DCM-4
Dual Contact Module
Features
• Single module with dual contact monitoring inputs
• Two (2) Class B or one (1) Class A monitoring inputs
• SLC Class A (Style 6,7) & Class B (Style4)
• Mounts in a standard 4” or double gang box
• Wiring terminals accessible when mounted in box
• All wiring terminals accept 22 to 14 AWG
• Product includes a 5 year warranty
NOTE: This addressable module does not support 2-wire smoke
detectors.
Stock Number: 1430822
S2930
Technical Specifications
Application
The DCM-4 is compatible with Potter’s PFC-6000 series and PFC8500 addressable fire alarm control panels. The DCM-4 is an interface
module used to monitor dry contact devices such as sprinkler water
flow, valve tamper switches, or conventional pull stations. The module
is capable of monitoring two separate Class B or one Class A circuits.
Operating Voltage
22.0-24.0V
Max SLC Standby Current
325 µA
Aux Power Required
1mA
Max Wiring Resistance of IDC
100 Ω
Max Wiring Cpacitance of IDC
1µF
EOL Resistor
Description
The DCM-4 uses two (2) consecutive SLC loop addresses when
monitoring two (2) Class B circuits or one (1) address when monitoring
a single class A (Style D) circuit. The module mounts on either a 4”
square or double gang box. The module is capable of monitoring two
(2) separate class B circuits making it ideal for monitoring sprinkler
waterflow and valve tamper switches when they are located in the same
proximity. The DCM-4 includes one red LED to indicate the modules
status. In normal condition, the LED flashes when the device is being
polled by the control panel. When a contact is activated, the LED will
light continuously and in case of an open circuit, the LED will turn off.
Potter Electric Signal Company, LLC • St. Louis, MO •
7165-0328:0196
Operating Tempurature Range
Operating Humidity Range
5.1K Ω
32 to 120ºF (0 to 49ºC)
0 to 93% (non-condensing)
Max no. of Module Per Loop
127 units (Class A) or 63 units
(Class B)
Dimensions
4.17” (106mm)L × 4.17”
(106mm)W × 1.14” (29mm)D
Mounting Options
Standard 4” Square or
Double Gang Box
Shipping Weight
Tech Support: 866-956-0988 / Customer Service: 866-572-3005
8830008 - REV B
• 7/14
0.6 lbs
• www.pottersignal.com
PAGE 1 OF 2
DCM-4
Dual Contact Module
Setting the Address
Each addressable module, smoke sensor, heat detector and combination sensor/detector must be assigned an address prior to installing the device. The
address is set using either the hand held device programmer or the addressing feature on the PFC 6000 /PFC 8500 Series control panels. When the DCM4 is used to monitor two individual Class B circuits a single device address is assigned, with the second address number assigned automatically by the
module assuming the next consecutive address. For example, if the first address number is assigned as “2”, the second address number will automatically
be assigned as SLC device address “3”.
Before connecting a device to the SLC loop, take the following precautions to prevent potential damage to the panel or device verify the following:
1. Power to the device is removed
2. Field wiring is correctly installed.
3. Field wiring has no open or short circuits.
Installation Using Compatible Electrical Box
Wiring Diagrams
DCM-4 With One Class A Circuit
NO1
C1
FROM FACP OR
PREVIOUS MODULE
FROM FACP OR
TO PREVIOUS
THE NEXT MODULE
S+
NO1
Z1
S-
C1
NO2
Z1
C2
S+
JP1
S-
TO THE NEXT MODULE
SELECT STYLE D
JP1
LED
NO2
Z2
LED
Z2
C2
NOTE: END-OF-LINE RESISTOR IS NOT REQUIRED
SELECT STYLE D
NOTE: END-OF-LINE RESISTOR IS NOT REQUIRED
DCM-4 With Two Class B Circuits
NO1
C1
FROM FACP OR
PREVIOUS MODULE
FROM FACP OR
TO PREVIOUS
THE NEXT MODULE
TO THE NEXT MODULE
SELECT STYLE B
S+
NO1
Z1
S-
C1
NO2
S+
JP1
Z1
C2
S-
LED
NO2
Z2
LED
Z2
JP1
END-OF-LINE RESISTOR
5.1K OHM 1/2W
END-OF-LINE RESISTOR
5.1K OHM 1/2W
C2
SELECT STYLE B
END-OF-LINE RESISTOR
5.1K OHM 1/2W
END-OF-LINE RESISTOR
5.1K OHM 1/2W
Potter Electric Signal Company, LLC
•
St. Louis, MO
• Tech Support: 866-956-0988 / Customer Service: 866-572-3005
8830008 - REV B
NO1
• 7/14
ONLY ONE NORMALLY CLOSED CONTACT
NOTE: END-OF-LINE RESISTOR IS NOT REQUIRED
•
www.pottersignal.com
PAGE 2 OF 2