4-18
AFP-400 Installation
PN 50253:A2 03/12/96
Setting the VCM-4 to Speaker or Telephone Mode
The VCM-4 comes with a factory-installed jumper plug on JP3. Use the
jumper to select the operating mode of the entire module (VCM-4 plus
optional VCE-4). Select Speaker or Telephone mode as follows:
Do not mix speaker and
telephone circuits on the
same module.
Selecting Telephone and Speaker Mode
Overview
JP3
Speaker mode
JP4
Telephone Mode
Selecting VCM-4 Mode
The following diagram shows typical wiring connections for a CMX-2 module
when installed with speaker circuits. All wiring shown is supervised and
powr limited. When making connections, note the following:
Audio Branch Circuit
Do not loop wire on terminals 3 and 4. Break the
wire run to provide supervised connections. Audio circuits require twisted
pair wire as a minimum.
Speaker Switching Circuit
Only use speakers listed for fire protection.
Maximum speaker load: 43.75 watts, up to 70.7 Vrms (.35 power factor).
Audio Branch
Circuit
SLC loop to
next device
To next control module
(last device returns to
amplifier for
supervision).
Speaker Switching
Circuit
SLC loop from
AFP-400 or
previous device
47K ELR
A2143-00
Typical CMX-2 Wiring Connections to Speaker Circuits
NC
Connecting a CMX-2
Module to Speaker
Circuits
Use shielded twisted pair
wire on SLC wiring.
Do not use terminal 5 on the
CMX-2 module.
Select...
Do this...
Speaker mode (factory setting) Leave the jumper in JP3.
Telephone mode
1) Remove jumber from JP3.
2) Install jumper in JP4.
