FC-RM
Remote Microphone Module
Product Installation Document
PN 51247:C 4/07/2008 07-873
The FC-RM Remote Microphone Module, which is installed in a CAB-RMRF cabinet as illustrated in Figure 1, provides
paging capabilities for compatible audio systems such as the ACC-25/50, ACC-25/50ZS, ACC-25/50ZST, ACC-25/
50DA, FC-25/50X and FC-25/50DA.
Following is a list of FC-RM features:
• Automatic gain control circuit
• All wiring is power-limited
• Supervised microphone
• All external wiring is supervised
• Power On LED
• Trouble LED
• Pluggable terminal blocks
• Remote location for paging
Power Specifications:
• 6 mA non-fire alarm current
• 30 mA when microphone is activated
• 24 VDC Nominal Operating Voltage
Figure 1: FC-RM in a CAB-RMRF
FC-MIM Microphone Interface Module Installation
The supplied FC-MIM Microphone Interface Module must be installed on the main circuit board of the host audio panel
(ACC-25/50, ACC-25/50ZS, ACC-25/50DA, FC-25/50X or FC-25/50DA).
CAUTION: CIRCUITS CONTAIN STATIC-SENSITIVE COMPONENTS
!
ALWAYS GROUND YOURSELF WITH A PROPER WRIST STRAP BEFORE HANDLING ANY CIRCUITS SO
THAT STATIC CHARGES ARE REMOVED FROM THE BODY. USE STATIC SUPPRESSIVE PACKAGING TO
PROTECT ELECTRONIC ASSEMBLIES.
To install the FC-MIM:
1. Be sure all power (AC and DC) is removed from the panel before installing the FC-MIM
2. Position the connector on the FC-MIM module over the audio panel main circuit board Remote Mic connector and
gently press down until the module is properly seated. Be careful not to bend or break any pins on the connector
3. Secure the FC-MIM module to the metal standoff on the main circuit board with the supplied screw
Power
Ground
+ Audio
- Audio
Earth
to Remote Microphone Cabinet
Standoff Mounting Hole
Metal Standoff
FC-MIM Microphone Interface Module
Remote Microphone Trouble LED
To Remote Mic Connector
Audio Panel Main Circuit Board
Figure 2: Installing an FC-MIM Module
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Installation With ACC-FFT Fire Fighter Telephone Module (ACC-25/50ZST Only)
The FC-RM Remote Microphone module is installed on the ACC-25/50ZST via wiring connections directly to the ACCFFT Fire Fighter Telephone Module. Note that the supplied FC-MIM module is not used.
CAUTION: CIRCUITS CONTAIN STATIC-SENSITIVE COMPONENTS
!
ALWAYS GROUND YOURSELF WITH A PROPER WRIST STRAP BEFORE HANDLING ANY CIRCUITS SO
THAT STATIC CHARGES ARE REMOVED FROM THE BODY. USE STATIC SUPPRESSIVE PACKAGING TO
PROTECT ELECTRONIC ASSEMBLIES.
To install the FC-RM:
1. Be sure all power (AC and DC) is removed from the panel before connecting the FC-RM to the ACC-FFT
2. Attach wiring to the pluggable terminal blocks and plug onto the ACC-FFT board
Remote Microphone Module
FC-RM
ACC-FFT
Figure 3: Installing an FC-RM Module
FC-RM Remote Microphone Installation Document — P/N 51247:C 4/07/2008 3
FC-RM Installation
Slide-in Label
A slide-in label (part number 51146) is provided with each
FC-RM assembly. Enter the location of the microphone
speakers on this label along with any instructions for speaker
activation, then slide the label into the label slot at the bottom
of the assembly. (See Figure 4).
FC-RM Installation to the CAB-RMRF Cabinet
CAUTION: CIRCUITS CONTAIN STATIC-SENSITIVE COMPONENTS
!
ALWAYS GROUND YOURSELF WITH A PROPER WRIST STRAP BEFORE HANDLING ANY CIRCUITS SO
THAT STATIC CHARGES ARE REMOVED FROM THE BODY. USE STATIC SUPPRESSIVE PACKAGING TO
PROTECT ELECTRONIC ASSEMBLIES.
1. Be sure all power (AC and DC) is removed before
installing the FC-RM .
2. Pull the required wiring into the CAB-RMRF cabinet
through the knockouts provided.
3. Attach wiring to the pluggable terminal blocks and plug
onto the FC-RM board
4. Carefully slide the board into the cabinet until it rests in the
slots on the back wall of the box.
5. Secure the FC-RM in the cabinet with the two self-tapping
screws provided.
Figure 4: Slide-In Label
RMRlbl.cdr
Knockouts
rmrknock.cdr
CABRMOPN.cdr
Slots
CABRM1SA.cdr
Screw Holes
Figure 5: Installing the FC-RM
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Wiring the FC-RM and FC-MIM
Microphone Connector
Power ON
LED
Trouble
LED
Shield 3
To FC-MIM (TB1)
From FC-MIM (TB1)
4
3
5
2
1
Figure 6: FC-RM Wiring
TB1: FC-RM OUTPUT
The FC-RM audio output terminals [TB1 Terminals 1 (+) and 2 (-)] provide an audio level when activated by the
microphone PTT (Push-To-Talk) switch. When the PTT is not activated, a +2 VDC voltage is present at the output of the
FC-RM . The output of the FC-RM connects to the Microphone Interface Module located in the host audio panel as
illustrated in Figure 6.
- Audio 2
+ Audio 1
Earth 3
Gnd 2
Power 1
TB2: INPUT POWER SUPPLY
The FC-RM is powered by the host audio panel via the FC-MIM. The FC-MIM supplies +24 VDC to the FC-RM via the
PWR (1) and GND (2) terminals. The FC-MIM also supplies Earth and analog grounds to the FC-RM . Refer to Figure 7.
LED 1 - This yellow LED will light when the FC-RM microphone is disconnected.
LED 2 - This green LED will light when the FC-RM is powered.
The FC-RM can be remotely connected to the host audio panel with the FC-MIM. Refer to the following table for wiring
distance limitations. It can be connected with a negligible amount of noise and distortion when the distances shown in the
table are not exceeded. The wiring configuration is shown in Figure 7.
Wire Gauge Max. Distance
12
14
16
18
6,000 ft (1,825 m)
3,840 ft (1,170 m)
2,400 ft (731 m)
1,500 ft (450 m)
FC-RM
Microphone
(connected to a host audio panel)
FC-MIM
Figure 7: FC-MIM Wiring
FC-RM Remote Microphone Installation Document — P/N 51247:C 4/07/2008 5
PSM - Push-to-Talk Switch Monitor
AGC - Automatic Gain Control
PSC - Power Save Circuit
Audio OUT
Power
Microphone
PSM
PSC
Output
Driver
AGC
Voltage
Regulator
Mic
Suprvsn
Power ON
LED
Trouble
LED
Figure 8: FC-RM Block Diagram
6 FC-RM Remote Microphone Installation Document — P/N 51247:C 4/07/2008
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