Audio Input Card/remote mic interconnections
Figure 9: Audio Input Card with remote mic interconnections
Callout Description
A 637-063 Audio Option Card
B 4100-1244 Remote Mic Enclosure
Note:
• Tie shield to PTT on option card side.
• Input level adjust does not adjust microphone input level.
• Leave the 10 K, 1/2 W resistors (378-030; brown/black/orange) on the + to - terminals of unused remote microphone contacts.
• All wiring is 18 AWG (0.8321 mm
2
), twisted-shielded pair.
• Audio wiring is not to be mixed in the same jacket with other wiring (including other audio wiring).
• Supervisory current is 2.4 mA at 24 VDC (nominal).
• Maximum wire distance: 4,000 ft (1,219 m).
• Only option card inputs 3 and 4 support remote microphones.
• Set audio input card jumpers for desired input sources as shown in Configuring the ES Net Audio Controller Card.
• Wiring is supervised and power-limited.
• Terminate shield as shown. Do not connect the shield to Earth.
Note: See Fire Alarm System Audio Input Card Installation Instructions 579-160 for information on the audio input card.
page 12 579-1408 Rev. B
ES Net Digital Audio Controller Installation Instructions
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