CM24W
SELECT-A-CHIME HORN
Potter Electric Signal Company • 2081 Craig Road, St. Louis, MO, 63146-4161 • Phone: 800-325-3936/Canada 888-882-1833 • www.pottersignal.com
MKT. #8850024 - REV A
5/06 PAGE 1 OF 2
PRINTED IN USA
A Brand
• Meets or exceeds NFPA/ANSI Standards
• UL Listed for wall mounting
• Screw terminal capacity up to AWG #12
• Universal mounting plate included
• Horn fi eld selectable tones:
2700 Hz or 2400 Hz
Temporal or Non-temporal
High or low dBA output
• Mounts to 4” square, single gang, double gang, or octagonal back box
• Synchronization requires Sync Module (SMD10-3A)
• Available in red or white housing
Amseco’s Select-A-Chime Series is designed to provide audible (private mode) for fi re alarm protection systems. It meets or exceeds NFPA/
ANSI audible emergency evacuation signal and UL 464 (private mode).
The CM24W provides a continuous tone or temporal pattern (code 3) tone when constant voltage from a FACP is applied. Each tone has two
dBA level settings (high or low) that can be achieved with the use of mini-jumpers located on the back of the unit. The CM24W Series can be
connected either independently or in unison. These appliances are polarized for connecting to supervised fi re alarm circuits.
The CM24W can by synchronized by using the SMD10-3A Sync Module.
Model Number Housing
Color Input Voltage Operating
Voltage
Range
Horn Sound
Output Wiring
Type Mounting
Type Sync
Module
Operating
Temperature
Range
CM24WR Red Regulated
24C DC/FWR 16-33V DC
16-33V FWR Selectable Terminals Wall SMD10-3A 32°F - 120°F
(0°C - 49°C)
CM24WW White
Engineering Specifi cations
The audible alarm indicating appliance shall be Amseco Model CM24W or equivalent device. The chime shall be listed under UL 464 standard
for audible signaling appliance and shall be approved for fi re protective service. The sound output shall be fi eld selectable. The chime shall
provide two different fi eld selectable temporal or steady tones, and a high and low fi eld selectable sound output setting. The signaling chime
shall operate on 24V DC from a non-coded, regulated DC supply or full-wave rectifi ed, unfi ltered supply. The chime shall have a universal
back mounting plate, capable of wall mounting to a back box. When strobe synchronization is required, the chime shall be compatible with
the Amseco SMD10-3A (daisy chain) or other source of Amseco sync protocol. Signaling devices shall be installed in accordance with current
NFPA guidelines.
Ordering Information
Chime Only Current
Draw Table PC3: Pattern
PC2: Tone PC1: Volume Maximum RMS Operating Current (mA) Minimum Sound Output
(dBA at 10 ft per UL 464)
Non-Temporal
PC3 PC2 PC1 Regulated 24V DC Regulated 24V FWR Regulated 24V DC
2700 Hz HIGH 1 1 1 45 58 66
LOW 1 1 0 40 52 61
2400 Hz HIGH 1 0 1 44 57 54
LOW 1 0 0 40 52 50
Temporal
2700 Hz HIGH 0 1 1 45 58 65
LOW 0 1 0 40 52 60
2400 Hz HIGH 0 0 1 44 57 53
LOW 0 0 0 40 52 48
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CM24W
Single Gang Box
Universal Mounting Plate
CM24W CM24W CM24W 4SP-M
4BX-1
4” Square Back Box Double Gang Box
MKT. #8850024 - REV A
5/06 PAGE 2 OF 2PRINTED IN USA
A Brand
Dimensions: inches (mm)
Wiring Diagram
Installation Options
CM24W
SELECT-A-CHIME HORN
Front View Side View Back View
5 (127)
5 (127)
1-17/32(39)
1-13/16(46)
3-3/8(85.7)
3-9/32(83.5)
3-9/32
(83.5)
3-3/8 (85.7)
Tone Selection PC3
Pattern PC2
Tone PC1
Volume
Jumper
Non-
Temporal 2700 Hz High
Temporal 2400 Hz Low
Control
Panel To Next
Device or
End-of-Line
Resistor
SYNC MODULE SMD10-3A
INPUT
HH
OUTPUT
SYNC MODULE SMD10-3A
INPUT
HH
OUTPUT
IN
IN
OUT
OUT
CHIME
Fig. 1
Wiring 1
Wiring 3
Wiring Diagram for Audible Strobe Class “B” Circuit with Audible Silence Feature (CM24W)
Wiring 2
Wiring Diagram for Audible Strobe Class “B” Circuit without Audible Silence Feature
Refer to Fig. 1
Refer to Fig. 1
F.A.C.P.
Horn Signal
Circuit
F.A.C.P.
Strobe Signal
Circuit
F.A.C.P.
Signal Circuit
To Next
Device or
End-of-Line
Resistor
To Next
Device or
End-of-Line
Resistor
PC1PC2PC3
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