4-16
AFP-400 Installation
PN 50253:A2 03/12/96
Connecting VCM-4 Speaker Circuits
Typical Speaker Circuits
Overview
Follow these guidelines when connecting VCM-4 speaker circuits:
1) Speaker circuits are supervised and power-limited.
2) Use twisted-pair cable for wiring speaker circuits.
3) Maximum speaker circuit wire resistance depends on wattage required
for each speaker.
4) Use only UL Listed speakers rated for 25 Vrms.
5) For systems with AA-100 amplifiers, you can use 70.7 Vrms speakers. Use
4.7K, 2W ELRs with 70.7 Vrms speakers.
6) Install End of Line resistors according to the table below:
VCM-4
NFPA Style Z
End each unused
circuit with a 4.7K ELR
part no. 71245
Resistor Requirements
For ELR connection to devices...
Use resistor part number...
with terminals
71252
with flying leads
71245
installed in Canada
N-ELR
Speakers
VCM-4 or VCE-4
Speaker Circuits
Wiring Diagram
Speakers
Speaker Power
Polarity
Optional Voice Control Expander Speaker
Circuits (provides positions E, F, G, and H
VCM-4 Speaker Circuits
positions A, B, C, and D
NFPA Style Y
4.7K, 1/2 watt ELR
part no. 71252
