AFP-400 Installation
PN
50253
:
A2 03/12/96
2-57
SLC Wiring with CMX Control Modules
CMX Module Overview
CMX Connections
CMX
Style D NAC ()
Style D NAC (+)
Loop ()
Style B NAC ()
Style B NAC (+)
Loop (+)
24 VDC Power ()
24 VDC Power (+)
CMX Control Module (configured for NAC operation)
The CMX Control Module is an addressable module that supervises and
switches power to a Notification Appliance Circuit. CMX-1 and CMX-2
modules are identical, but a CMX-2 has a higher voltage rating (70.7) at full
current. You can wire a CMX as an NFPA Style Y or Style Z Notification
Appliance Circuit or use a CMX module as a Form-C control relay.
The following table contains instructions for connecting a CMX module.
For the following...
Connect...
Communications (SLC) Loop
Connections
The communications loop to CMX terminals 1()
and 2 (+). The CMX takes one module address
on the loop. Set the rotary switches on the CMX
to the requiered loop address.
NFPA Style Y Notification
Appliance Circuit
Polarized alarm notification appliances to a
two-wire circuit. Do not T-tap or branch a Style Y
circuit and terminate the circuit across the last
device using a 47K, 1/2-watt ELR (P/N ELR-47K).
Connect the two-wire circuit to CMX terminals 6
(+) and 7 ().
NFPA Style Z Notification
Appliance Circuit
Polarized alarm notification appliances to a single
two-wire circuit. Do not T-tap or branch a Style Z
circuit. No external ELR is required for Style Z
wiring. Connect the four-wire circuit to CMX
terminals 6 (+) and 9 (+), then 7 () and 8 ().
Notification Appliance Power Notification appliance power to CMX terminal 3
(common) and terminal 4 (+24 VDC). This
power must be supervised by a compatible listed
Power Supervision Relay.
Alternate power arrangement Power the module
(terminals 3 and 4) from one of the NACs on the
MPS and supervise this current with a 2.2K 1/2W
resistor (P/N ELR-2.2K). Program the NAC to
activate on a general alarm (map to zone F0).
CMX Module Connections
The CMX module contains a magnetic test switch located on the front of the
module. Activate the test switch by placing a magnet over the CMX plastic
cover. Test switch activation causes a short circuit indication on a Style B or
Style D loop.
CMX Module Test Switch
