ADT Unimode 400 Multi-Net Installation Manual page 122

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4-18
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 detailed in Table 4-13:
Select...
Speaker mode (factory setting)
Telephone mode
Table 4-13 Selecting Telephone and Speaker Mode
Figure 4-18 shows how to select Speaker or Telephone mode for a VCM-4 module:
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Figure 4-19 shows typical wiring connections for a M500CH module when installed
with speaker circuits. All wiring shown is supervised and power-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 UL-listed for fire protection.
Maximum speaker load: 43.75 watts, up to 70.7 Vrms (0.35 power factor).
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Do this...
Leave the jumper on JP3.
1. Remove the jumper from JP3
2. Install the jumper on JP4.
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Unimode 400 Installation PN 50710:A 10/22/97
Voice Alarm Modules
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