Bulletin PC-CPS-1
DWYER INSTRUMENTS, INC.
Phone: 219/879-8000 www.dwyer-inst.com
Specifications - Installation and Operating Instructions
Series CPS Cable Pull Switch
The Series CPS Cable Pull Switch is designed to provide a
switching system to isolate the power to the conveyor system or
other similar process equipment in event of a shut-down condi-
tion. A steel wire is placed along the side of the conveyor and at-
tached to the cable pull switch. When the cable is pulled at any
point along the conveyor it will trip the cable pull switch causing
the conveyor to shut down. To restart the conveyor the CPS
must be manually reset. The series CPS has a universal design
for bi-directional activation and utilizes a highly visible red flag to
indicate the switch status. The compact design makes it ideal for
easy installation.
APPLICATIONS
• Conventional Belt Conveyors
• Ship Loading/Unloading Systems
• Stacker/Reclaim Conveyors
• Apron Feeder Conveyors
• Tripper or Shuttle Conveyors
• Bucket Elevators
• Horizontal Feed Systems
SPECIFICATIONS
Temperature Limits: -4 to 140°F (-20 to 60°C).
Enclosure: Die cast aluminum.
Enclosure Rating: NEMA 6 (IP 67).
Switch Type: 2 SPDT.
Electrical Rating: 10 amp @ 125/250 VAC; 1/2 amp @ 125
VDC.
Electrical Connection: 3 screw type, common, normally open,
normally closed.
Electrical Conduit: Two 3/4˝ female NPT.
Activation Angles: 30 degrees.
Activation Force: 11 +/- 2.25 pounds.
Control Type: Manual reset.
Weight: 6.4 pounds.
OPERATION-INDICATING
PLATE
INSIDE VIEW
CAMS
INSULATORS
MICROSWITCHES
5-1/8
[130.18]
3-7/16
[87.31]
2-9/16
[65.09]
1-1/8
[28.58]
19/32
[15.03]
COVER BOLTS
4X M10
RESETTING
LEVER
63/64
[25]
CASE
COVER
61/64
[24.21]
3-23/64
[85.33]
1-31/32
[50]
29/32
[23.02]
1-31/32
[50]
51/64
[20.24]
6-1/16
[153.99]
1/8
[3.18]
LEVER
2-21/64
[59.13]
3-15/16
[100.01]
2X 3/4˝
NPT
SHAFT
3-15/16
[100.01]
8-7/16
[214.31]
2-15/64
[5.95]
PULLING DIRECTION
1/4
[6.35]
30°
LOCK POSITION
31/64
[12.3]
2-49/64
[70.25]
2X 2-11/64
[55.17]
2-9/16
[65.09]
2X 1-1/2
[38.1]
5-1/8
[130.18]
1-37/64
[40.08]
9/32
[7.14]
ø13/32 [10.32]
MOUNTING HOLES
SHACKLES
OPERATING DIRECTION
PC-CPS-1:TEMPLATE 7/10/09 10:11 AM Page 1
Operation Principle
The CPS is designed to provide a switching system to isolate the
power to conveyor system and other equivalent process
equipment in a shutdown condition. The cable pull switch is
actuated by a steel wire, which is placed along-side the
conveyor. By pulling on the cable at any point, the CPS will
activate when the operating lever rotates 30 degrees clockwise,
automatically locking the switches. The CPS can be reset by
pressing down on the reset lever.
OPERATING LEVER
3/4˝ FNPT CONDUIT CONNECTION
SPRING
CAM
MICROSWITCH
RESETTING LEVER
INSULATING PAPER
CASING
PACKING
PC-CPS-1:TEMPLATE 7/10/09 10:11 AM Page 2
WIRE CUP
CABLE
MOUNTING
BASE
FRAME OF BELT
CONVEYOR
6˝
8.25˝
4.5˝
Installation
Eye bolts should be prepared before installation, and should be
spaced according to the cable length (Figure 2). A single pull
cord up to 50 feet should have an eye bolt mounted every 10
feet. When using a single pull cord up to 75 feet there should be
an eyebolt every 3 feet. The maximum length of cable between
CPS is 75 feet (Note: Variations in temperature will cause cable
to expand and contract). The ideal cord is a steel cable 0.25
inches in diameter. Figure 3 is a typical installation of a CPS.
CONVEYOR BELT FRAME
EYE BOLTS
CABLE
Fig. 2 Installation of Eye Bolts
Fig. 3 Typical Installation of CPS
PC-CPS-1:TEMPLATE 7/10/09 10:11 AM Page 3
Wiring
The Cable Pull Switch has 2 SPDT relays that can be accessed
by removing the cover. The independent relays can be used to
control two separate circuits such as a motor starter and a signal
light.
Adjustment
The cams are set at the factory to trip the microswitches when
the operating arm is rotated 30 degrees clockwise. Cams can be
adjusted by loosening the set screw.
MAINTENANCE
Clean excessive amount of dust when it accumulates on the
operating lever. Occasionally check to see if the CPS is working
normally by pulling the cable. After the CPS is installed check the
housing cover to ensure it is tight, water and dust can enter
between the cover and casing if it not tightened correctly causing
the switch to malfunction. The CPS is not field serviceable and
should be returned if any repair is needed (field repair should not
be attempted and may void warranty). Be sure to include a brief
description of the problem plus any relevant application notes.
Contact customer service to receive a returns good authorization
number before shipping.
DWYER INSTRUMENTS, INC.
Phone: 219/879-8000 www.dwyer-inst.com
©Copyright 2009 Dwyer Instruments, Inc. Printed in U.S.A. 7/09 FR# R4-443727-50
DEACTIVATEDACTIVATED
ROLLER LEVEL
TERMINAL SCREW
COM-1, 4
NO- 3, 6
NC- 2, 5
PC-CPS-1:TEMPLATE 7/10/09 10:11 AM Page 4
-
1
-
2
-
3
-
4
Ask a question and I''ll find the answer in the document
Finding information in a document is now easier with AI
Related papers
-
Dwyer Wireless Temperature/Humidity User manual
-
-
-
-
-
-
-
-
-
