Legrand Arp Installation guide

Legrand
Brand
Legrand
Model
Arp
Type
Installation guide

Legrand Arp is a modular device that provides distributed control of lighting and electrical loads in a building. Its primary purpose is to give occupants convenient control of these loads while automatically saving energy.

Arp can be mounted close to the electrical load it controls, eliminating costly wiring. The low voltage (Class 2) inputs to the Arp may use any switch or device contact as a signal to operate the relay outputs.

Users can implement the Arp with various devices, including:

  • ACP-Net Panels
  • Other Arp Automatic Relay Packs
  • SC-100 System Clock
  • Occupancy sensors
  • Photocells

Legrand Arp is a modular device that provides distributed control of lighting and electrical loads in a building. Its primary purpose is to give occupants convenient control of these loads while automatically saving energy.

Arp can be mounted close to the electrical load it controls, eliminating costly wiring. The low voltage (Class 2) inputs to the Arp may use any switch or device contact as a signal to operate the relay outputs.

Users can implement the Arp with various devices, including:

  • ACP-Net Panels
  • Other Arp Automatic Relay Packs
  • SC-100 System Clock
  • Occupancy sensors
  • Photocells
Santa Clara, CA 95050
800.879.8585
Automatic
Relay Pack
Model # ARP
ARP-Net
User Guide
Copyright © 2000 The Watt Stopper, Inc., All rights reserved.
INTRODUCTION. . . . . . . . . . . . . . . . 3-4
Welcome to the Automatic Relay Pack
(ARP). . . . . . . . . . . . . . . . . . . . . . . . 3
Model Numbers. . . . . . . . . . . . . . . 4
Box Contents . . . . . . . . . . . . . . . . 4
Description . . . . . . . . . . . . . . . . . . . . 4
INSTALLING THE ARP. . . . . . . . . . 5-10
General Installation Information. . . . . 5
Mounting the ARP. . . . . . . . . . . . . . . 6
Connecting the ARP to the
electrical system. . . . . . . . . . . . . . . . 6
Installing the ARP low voltage and
network communication wiring . . . . . 7
Why Use Networking?. . . . . . . . . . 7
Low Voltage and Network Wiring. . 8
Configuring for Network Use. . . 9-10
ARP OVERVIEW. . . . . . . . . . . . . . 11-20
Standard Features . . . . . . . . . . . . . 11
Inputs. . . . . . . . . . . . . . . . . . . 11-14
Configuration Switches. . . . . . 15-16
Outputs . . . . . . . . . . . . . . . . . 16-17
Power Supply . . . . . . . . . . . . . . . 17
Power Failure Features . . . . . . . . 18
Modes of Operation . . . . . . . . . . . . 18
Troubleshooting. . . . . . . . . . . . . 18-20
Non-working switch . . . . . . . . . . . 18
Lights fail to shut off . . . . . . . . . . 19
Technical Support . . . . . . . . . . . . . . 21
Ordering Information . . . . . . . . . . . . 21
Warranty Information . . . . . . . . . . . . 21
CONTENTS
Call (800) 879-8585 for Technical Support
This chapter covers the following topics:
• Welcome to the Automatic Relay Pack (ARP)
• Description: What the ARP does. What devices it
works with.
Welcome to the Automatic Relay Pack (ARP)
The Automatic Relay Pack (ARP) is a modular device that provides dis-
tributed control of lighting and electrical loads in a building. Its primary
purpose is to give occupants convenient control of these loads while auto-
matically saving energy.
INTRODUCTION
3
4
INTRODUCTION
Box Contents:
Description:
• ARP or ARP-Net
• User Guide
Model Numbers:
ARP-120/277
ARP-Net-120/277
The ARP uses inputs from manual switches, time switches, building con-
trols or other devices to control lighting, air conditioning, fans, etc., via
two relay outputs. It can function in either a hardwired or, with an ARP-
Net, a networked wire control system.
It can be mounted close to the electrical load it controls, eliminating costly
wiring. The low voltage (Class 2) inputs to the ARP may use any switch or
device contact as a signal to operate the relay outputs.
Users can implement the ARP with a wide variety of devices including:
• ACP-Net Panels
• Other ARP Automatic Relay Packs
• SC-100 System Clock
• Occupancy sensors
• Photocells
• Time switches
Call (800) 879-8585 for Technical Support
This chapter covers the following topics:
• General installation information
• Mounting the ARP
• Connecting the ARP to the electrical system
(high voltage connections)
• Installing the ARP low-voltage and, for the ARP-Net, network
communication wiring
General Installation Information
• All power must be turned off prior to installation
or service.
• Operation of more than one disconnect may be
required to de-energize power to the ARP.
• External circuit protection to the ARP is required.
• Installation shall be in accordance with all applicable
regulations, wiring practices and codes.
• Care should be taken to separate high-voltage
power from low-voltage (Class 2) control wiring.
INSTALLING THE ARP
5
WARNING
Improper installation or connection of the
ARP may result in serious injury and/or damage to
the ARP and other devices.
CAUTION
Risk of Electric Shock
Mounting the ARP
The ARP should be placed in an accessible ceiling space or accessible
location close to the load. It should be installed directly above the con-
trolling switches.
Mount the ARP to a standard J–box using the 1/2" nipple and locknut
provided with the ARP.
Connecting the ARP to the electrical system
All ARP line voltage wiring extends through the 1/2" chase nipple into an
installer supplied J–box. Connection to these wires should be made
using wire nuts or a similar approved method. The ARP control power is
dual voltage. Connect line voltage power to the brown wire for 277V or
the black wire for 120V. Cap off the unused power wire with a wire
nut. The control power for the ARP may or may not be shared with the
power switched to the load. Relay outputs and ARP power may be dif-
ferent voltages.
Output wires from the ARP, red wires (output #1), and orange wires (out-
put #2) are not sensitive to which is line and which is load.
INSTALLING THE ARP continued
6
Figure 2.1. Connecting the ARP to the building’s electrical system.
Power
Neutral
Gnd
Output 1
Load & Line
Output 2
Load & Line
BLK/BRN
WHT
GRN
RED
RED
ORG
ORG
ARP
Enclosure
WARNING
Do not drill into the ARP enclosure.
Call (800) 879-8585 for Technical Support
INSTALLING THE ARP continued
7
Why Use Networking? (ARP-Net only)
The benefits of implementing a networked lighting control system using
the ARP-Net are numerous. This enables communication with any other
control device being used in the system, such as multiple ARPs, system
clocks, occupancy sensors, or time switches. Furthermore, the use of net-
working reduces installation and wiring costs, since the need for home run
wiring is eliminated. System administration can be much more flexible,
with remote or onsite programming and maintenance possible.
Low Voltage & Networking Wiring
General Wiring Notes
Remove the ARP’s cover to access the connectors and configuration
switches in the low voltage section. All input/output wiring in this section
must be low voltage, Class 2 wiring. Refer to local codes regarding Class
2 wiring practices. Do not run low voltage wiring with line voltage or
power wiring.
Use the concentric 1/2" or 3/4" knockout openings to bring wiring into the
low voltage section. If the low voltage wiring must be run in conduit, con-
nect the ARP to the low voltage wiring through a junction box. Do not
directly connect conduit runs to the low voltage section of the ARP. Do not
use the ARP low voltage wiring compartment as a raceway or junction
box for low voltage wiring.
Properly strip and crimp wiring using 0.25" quick connect lugs to termi-
nate wiring to the ARP connectors. These lugs must be UL listed.
Use lug part no.:
• Panduit #DNF14-250(blue) 18–14 AWG or
equal T&B #RB2573
• Panduit #DNF18-250(red) 22–18 AWG or
equal T&B #RA2573
INSTALLING THE ARP continued
8
Low Voltage Input Wiring
Low voltage wiring to switches, occupancy sensors, etc. should be
stranded 18 or 22 gauge wire. This wire is not required to be either
twisted or shielded. Wiring distances to switches may be up to 5,000 feet.
Network Wiring (ARP-Net only)
Network wiring should be twisted pair, unshielded and stranded. Installers
should use wire insulation rated as required by local building codes.
Selection of wire type depends on distances and the network design
being implemented (see Table 2.1). Installers should make connections to
terminal marked "Network A and B." Network wiring is not polarity sensi-
tive; it does not matter which terminal is connected to which wire.
Table 2.1. Wire requirements for ARP-Net network wiring.
Figure 2.2. Low voltage wiring section of the ARP.
TO1
TO2
B/E
FAC
FBC
1MS
1PB
2MS
2PB
1+2A
1+2B
O
N
123456789101112
1
2
4
8
16
32
64
128
O
N
12345678
ON
OFF
ON
OFF
ADDRESS
CLASS 2 CIRCUIT WIRING ONLY
FEATURE INPUTS
INPUT / OUTPUT 1
NETWORK
AB
CONFIG.
POWER
N.C.
N.O.
COM
AUX-1
RELAY
RELAY
STATUS
COMMON
SERVICE
(OFF)
SW1B
(ON)
SW1A
SW1A-V OUT1-24VDC
INPUT / OUTPUT 2
N.C.
N.O.
COM
AUX-2
RELAY
RELAY
STATUS
(OFF)
SW2B
(ON)
SW2A
SW2A-VOUT2-24VDC
FC MODE +24VDC
FA FBFA-V
Network wiring from
other devices
Network wire connections
Max. Distance Wiring Topology Cable Size Belden #
1500 feet Free 22 Gauge 8442
8000 feet Linear 16 Gauge 8471
Call (800) 879-8585 for Technical Support
Configuring the ARP-Net for Network Use
To set up the ARP-Net after the line and low voltage connections and net-
work communications have been established, use the Lighting Control
Software (LCS), System Programmer (SP-1), or the System Clock (SC-
100).
NOTE: Lighting control systems with up to 199 individually addressed
devices may use the SP-1; systems containing more than 199 devices
should use the LCS.
Addressing the ARP-Net device is necessary so that the system adminis-
tration tool can identify it, and it can communicate with other devices in
the lighting control system. (The factory default address setting for the
ARP-Net module is zero (0).) When addressing the ARP-Net device, keep
the following guidelines in mind:
• Provide each ARP-Net with its own unique address.
• Address the ARP-Net using either the SP-1, LCS, or physically on the
ARP-Net device itself using the DIP switches.
• If using the DIP switches to address the ARP-Net, keep in mind that the
DIP switch settings override settings made from the LCS or SP-1; thus, if
addressing is done using the LCS or SP-1, all DIP switches must be set
to zero (0).
Figure 2.3. Port for connecting SP-1 to ARP-Net
INSTALLING THE ARP continued
9
TO1
TO2
B/E
FAC
FBC
1MS
1PB
2MS
2PB
1+2A
1+2B
O
N
123456789101112
1
2
4
8
16
32
64
128
O
N
12345678
ON
OFF
ON
OFF
ADDRESS
CLASS 2 CIRCUIT WIRING ONLY
FEATURE INPUTS
INPUT / OUTPUT 1
NETWORK
AB
CONFIG.
POWER
N.C.
N.O.
COM
AUX-1
RELAY
RELAY
STATUS
COMMON
SERVICE
(OFF)
SW1B
(ON)
SW1A
SW1A-V OUT1-24VDC
INPUT / OUTPUT 2
N.C.
N.O.
COM
AUX-2
RELAY
RELAY
STATUS
(OFF)
SW2B
(ON)
SW2A
SW2A-VOUT2-24VDC
FC MODE +24VDC
FA FBFA-V
• The number of available addresses for the ARP-Net module depends on
the addressing method being used. If one is using the DIP switches,
available addresses are from 1-256; if using the LCS software, addresses
are available up to 30,000.
Setting device addresses via the DIP switches requires use of the binary
format, where adding the value of each switch turned on equals the
device’s address (see Figure 2.4 for example).
Before selecting a device address for the ARP-Net, the installer or admin-
istrator must know what the remaining available addresses are system-
wide to avoid duplication of device addresses.
See also the User Guides for either the SP-1 or the LCS for detailed
instructions on addressing the ARP-Net device.
INSTALLING THE ARP continued
10
TO1
TO2
B/E
FAC
FBC
1MS
1PB
2MS
2PB
1+2A
1+2B
O
N
123456789101112
ON
OFF
1
2
4
8
16
32
64
128
O
N
12345678
ON
OFF
ADDRESS
CLASS 2 CIRCUIT WIRING ONLY
FEATURE INPUTS
INPUT / OUTPUT 1
NETWORK
AB
CONFIG.
POWER
N.C.
N.O.
COM
AUX-1
RELAY
RELAY
STATUS
COMMON
SERVICE
(OFF)
SW1B
(ON)
SW1A
SW1A-V OUT1-24VDC
INPUT / OUTPUT 2
N.C.
N.O.
COM
AUX-2
RELAY
RELAY
STATUS
(OFF)
SW2B
(ON)
SW2A
SW2A-VOUT2-24VDC
FC MODE +24VDC
FA FBFA-V
1
2
4
8
16
32
64
128
O
N
12345678
ON
OFF
ADDRESS
Figure 2.5. DIP switches in the low voltage wiring section of the ARP-Net
Call (800) 879-8585 for Technical Support
This chapter covers the following topics:
• Standard Features
• Modes of Operation
• Troubleshooting
NOTE: The settings described in this chapter are the default settings for
all inputs, outputs, and configuration switches. These settings can be
reconfigured in ARP-Net models using the Lighting Control Software
(LCS), the System Programmer (SP-1), or the System Clock (SC-100).
STANDARD FEATURES
Inputs
Standard Switch Inputs
The ARP contains two independent dedicated switch inputs that allow
operation with four switch types each. These switch types are 1) stan-
dard maintained switch (figure 3.1); 2) momentary ON-momentary
OFF switch (figure 3.2); 3) momentary push button switch (figure 3.3);
and 4) DC voltage signal (figure 3.4).
ARP OVERVIEW
11
1MS
1PB
76
2MS
2PB
9
OFF
8
Input 1 Input 2
ONOFFON
COMMON
SW1A(2A)
ARP
Terminals
DIP switch
configuration
Figure 3.1. Standard
Switch Input Wiring for
maintained switch
NOTE: Use the DIP switch setting shown in each figure to configure
each input for the desired type of switch.
ON/OFF operation of a standard switch input directly operates the cor-
responding relay output ON/OFF. The ARP standard switch inputs are
configurable to operate with either a dry contact switch or a DC volt-
age. It cannot operate with both a dry contact and DC voltage simulta-
neously. Refer to the standard switch input wiring diagrams for terminal
connections and configuration switch settings.
The ARP will accept a positive DC voltage from 5 to 24V as an ON
signal and a transition from the 5 to 24V voltage to zero voltage as an
OFF signal. The voltage must be referenced to the ARP common (DC
minus).
ARP OVERVIEW continued
12
1MS
1PB
7
OFF
6
2MS
2PB
9
OFFOFFOFF
8
Input 1 Input 2
SW1B(2B)
COMMON
SW1A(2A)
ARP
Terminals
DIP switch
configurations
1MS
1PB
76
2MS
2PB
9
OFFOFF
8
Input 1 Input 2
COMMON
SW1A(2A)
ARP
Terminals
ON ON
Configuration
DIP switches
Figure 3.2. Standard
Switch Input Wiring for
momentary ON/momentary
OFF switch
Figure 3.3. Standard
Switch Input Wiring for
momentary push button
switch
gg
1MS
1PB
7
OFF
6
ON
2MS
2PB
9
OFF
8
ON
COMMON
SW1A(2A)-V
-VDC
(reference)
+5-24VDC (on)
0VDC (off)
ARP
Terminals
Input 1 Input 2
DIP switch
configuration
Figure 3.4. Wiring diagram
for DC voltage signal
Call (800) 879-8585 for Technical Support
ARP OVERVIEW continued
13
After-Mode Input
This input signals the ARP module to operate differently to shut off
lighting that is not in use.To access this mode, the ARP must be con-
nected to either a system clock or central panel that provides the sig-
nal at a pre-set time. (See Modes of Operation on page 3.8 for further
information.)
Feature Switch Inputs
The ARP contains three feature switch inputs that permit connection of
the module with a variety of control devices.
Feature Switch "A" Input
Feature Switch "A" Input (FA/FA-V) accepts a maintained contact clo-
sure, turning relay output #1 ON when closed, and OFF when opened.
Input FA-V responds exactly as input FA, except it requires a 0-24VDC
signal, sourced from the ARP, to operate relay output #1 ON/OFF.
Use input FA-V to connect the DC output of occupancy sensors, light
sensors, etc., to operate output #1.
COMMON
FA
Controls
Output 1 only.
FACFAC
CONFIG. SWITCH SETTINGS
4
OFF
Photocell,
Occ.
Sensor
or other
device.
+24VDC
FA-V
ARP
COMMON
Interlock Output 1
with Input closure.
4
ON
Figure 3.6. Wiring diagram
for feature switch “A” input
(maintained contact closure)
Figure 3.5. Connecting the
ARP with a system clock.
COMMON
MODE
ARP
Terminals
ARP OVERVIEW continued
14
Feature Switch "B" Input
This input accepts a maintained contact closure, turning relay output
#2 ON when closed, and OFF when open. This input could be used to
allow an alarm system, fire system, time switch or other control device
to turn ON/OFF the relay outputs independent of the standard switch
inputs.
Feature Switch "C" Input
This input accepts a momentary push-button contact closure, turning
relay outputs # 1 and # 2 ON and OFF in a four step sequence. In this
sequence, with the first push, relay output #1 is turned ON. The sec-
ond push turns relay output #1 OFF and #2 ON, the third push turns
both #1 and #2 relay outputs ON. The fourth push will turn all relay
outputs OFF. Feature switch C allows a single push button switch to
independently control a two level or two scene lighting application.
COMMON
FB
Controls
Output 2 only.
CONFIG.
SWITCH
5
OFF
ARP
Terminals
Maintained Input
Controls Output
1 and 2
simultaneously.
5
ON
Figure 3.7. Wiring diagram
for feature switch "B" input
(maintained contact clo-
sure).
COMMON
FC
ARP
Terminals
Each closure steps
relay outputs through
operational sequence.
Momentary Push Button Switch
Figure 3.8. Wiring diagram
for feature switch "C" input
(momentary push-button
closure).
Call (800) 879-8585 for Technical Support
ARP OVERVIEW continued
15
Configuration Switches
The ARP configuration switches are used to define the operation of the
ARP. The factory default settings for these switches are all OFF.
The ARP has a total of 12 configuration switches. Figure 3.9 illustrates
the configuration switch types.
Configuration switches #1 (TO1) and #2 (TO2) provide time override
settings for the after-hour mode (see Figure 3.10).
Switch #3 (B/D) can be set to enable or disable the blink warning for
the after-hour mode.
Switch #4 configures the operation of feature switch "A" input. When
switch #4 (FAC) is turned ON, input FA and FA-V locks out the control
of relay output #1. There must be a closure to common on input FA or
5-24VDC on input FA-V for relay output #1 to turn ON with the ON
Time Override #1
Time Override #2
Blink Enable(Off)/Disable(On)
Feature A Configuration
Feature B Configuration
Input #1 Maintained
Input #1 Push Button
Input #2 Maintained
Input #2 Push Button
Tie Input 1A+2A Together
Tie Input 1B+2B Together
TO1
TO2
B/E
FAC
FBC
1MS
1PB
2MS
2PB
1+2A
1+2B
1
2
3
4
5
6
7
8
9
10
11
TO1
TO2
B/E
FAC
FBC
1MS
1PB
2MS
2PB
1+2A
1+2B
O
N
123456789101112
Figure 3.9. Configuration
switches.
Figure 3.10. Time override
configuration switches.
CAUTION
Disable the blink warning for outputs
controlling loads such as HID lamps, air conditioning,
fans and other similar loads.
operation of either a standard switch input or a feature switch input.
When input FA (or FA-V) is closed, output relay #1 reverts back to its
last commanded state. This means that before a switch input can turn
relay output #1 ON, input FA must be closed or input FA-V must have
5-24VDC.
Switch #5 (FBC) configures the operation of feature switch "B" input.
When this switch is turned ON, input FB is then interlocked to control
both relay output #1 and 2 ON/OFF simultaneously.
Switch #6 (1MS) & #7 (1PB) configure standard input one to operate
with a maintained switch or a momentary push-button switch.
Switch #8 (2MS) & #9 (2PB) configure standard input two to operate
with a maintained switch or a momentary push-button switch.
Turn configuration switches #10 (1+2A) and 11 (1+2B) ON to oper-
ate outputs #1 and 2 ON/OFF together from a single standard switch
input.
Switch #12 is unused.
Outputs
The ARP contains two line voltage relay outputs that are rated 20 amp
tungsten at 120V, 20 amp ballast load at 277V and one HP at 250
VAC. Wiring for these relay outputs is shown in Figure 2.1.
Auxiliary Contact Outputs
The ARP has one auxiliary set of isolated relay contact outputs
(NO/NC) for each relay output. These contacts open and close with
the operation of the corresponding relay output. These contacts are
rated for 1 Amp at 24V.
ARP OVERVIEW continued
16
N.O.
(normally open)
N.C.
(normally closed)
Aux com
To External
Device
ARP
Terminals
ARP Auxilliary
relay contacts
Contacts rated at
1amp @ 24V AC/DC
Figure 3.11. Wiring diagram
for auxiliary contact output.
Call (800) 879-8585 for Technical Support
ARP OVERVIEW continued
17
Pilot Light/Voltage Output
The ARP contains two powered 24VDC outputs that turn ON and
OFF with the state of relay outputs #1 and 2 (Terminals "OUT1-
24VDC" and "OUT2-24VDC"). These outputs are for powering pilot
lights in switches or other similar devices. These outputs are refer-
enced to the ARP common and have a maximum combined output
current of 200mA.
NOTE: The maximum output current is reduced by the amount of
current used for "External Power." The 200mA maximum current is
shared between the pilot light voltage outputs and the external
power available.
Power Supply
Terminal "+24VDC" is a 24VDC power supply referenced to the ARP
common. This can be used to power other devices such as occu-
pancy or light sensors. It has a total current output of 200mA.
NOTE: The maximum current is reduced by the amount of current
used for pilot light voltage outputs. The 200mA maximum current is
shared between the pilot light voltage outputs and the external power
available.
Figure 3.12. Wiring diagram
for pilot light/voltage output.
Figure 3.13. Wiring diagram
for power output.
Power Failure Features
When power is restored to the ARP following a power loss, the ARP
executes a power-up sequence. First, it checks all inputs for a closure
on the "ON" input. If there is a closure (to common), it turns that relay
output ON. If the relay output is not turned ON from a closure on the
input, it then reverts to the ON or OFF state it was in prior to the loss in
power.
Modes of Operation
There are essentially two modes of operation of the ARP. The first, reg-
ular mode, is defined by the user’s configuration of the module. It
allows the ARP to turn on/off through operation of switches, or other
devices that are used to control the ARP. The other mode is the after-
hour mode. Receiving a signal (i.e., contact closure) from a connected
system clock or central panel (or from a command across the network)
to the after-hour input on the ARP "selects" this mode. (See Figure
3.5.)
In the after-hour mode, the ARP‘s relay outputs that are on automati-
cally blink (assuming the blink warning feature has been enabled), wait
five minutes for switch operation, and then shut off if no switch opera-
tion is detected. In this mode, any time a switch turns the lights on, the
ARP allows the lighting to remain on until the override time expires
(see figure 3.10 for setting the override time option). The ARP
autonomously initiates shut off without any further signal from another
device other than the initiation of the after-hour mode signal.
Setting up the after-hour blink warning
To enable/disable the blink warning, place configuration switch #3 in
the desired position as illustrated by Figures 3.14 and 3.15.
ARP OVERVIEW continued
18
Blink warning
enabled.
B/D
OFF
3
Figure 3.14. Position of con-
figuration switch #3 with
blink warning enabled.
Troubleshooting
Non-working switch
If the ARP is fully installed and connected to the switch (es) it will
control, and the switch itself fails to operate in response to ARP sig-
nals, there are a number of steps you can follow to identify the
problem.
First, confirm that the ARP is correctly configured for the type of
switch you are trying to control (i.e., standard maintained switch,
momentary ON-momentary OFF switch, or momentary push button
switch).
If the configuration is correct, proceed to determine if the wiring
between the ARP and the switch is correct. One side must be con-
nected to common as illustrated in this chapter. Measuring the open
switch with a volt meter should produce readings of 4-5 VDC. If the
meter does not produce these readings, this means the switch is
not connected.
If the preceding aspects are all correct, the problem may be that the
output is locked or overridden from another switch. Clear the locked
or overriding device before it can operate the ARP output correctly.
ARP OVERVIEW continued
Call (800) 879-8585 for Technical Support
19
Blink warning
disabled.
B/D
3
ON
Figure 3.15. Position of con-
figuration switch #3 with
blink warning disabled.
ARP OVERVIEW continued
20
Lights fail to shut off in after-hour mode
First, verify that the ARP is connected to the system clock, and that
the clock is programmed to send a signal to the ARP (i.e., contact
closure). See page 13 for information on connecting the ARP to the
system clock. For more information about how to program the SC-
100 System Clock, refer to the SC-100 User Guide.
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Legrand Arp Installation guide

Legrand
Brand
Legrand
Model
Arp
Type
Installation guide

Legrand Arp is a modular device that provides distributed control of lighting and electrical loads in a building. Its primary purpose is to give occupants convenient control of these loads while automatically saving energy.

Arp can be mounted close to the electrical load it controls, eliminating costly wiring. The low voltage (Class 2) inputs to the Arp may use any switch or device contact as a signal to operate the relay outputs.

Users can implement the Arp with various devices, including:

  • ACP-Net Panels
  • Other Arp Automatic Relay Packs
  • SC-100 System Clock
  • Occupancy sensors
  • Photocells
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