Electrical ratings:
24VDC, 61mA
5VDC, 29mA
Use unshielded twisted pair for high
level amplifier connections. Use
shielded twisted pair for terminals 1
and 2. Use single-conductor wire for
other connections.
Maximum wire length:
Refer to the decibel (dB) loss chart in
the tables below. The wire length
includes the length of the wire from
the amplifier to the ASC-2, from the
ASC-2 to the ZC series of audio cards,
and the wire length in the longest
audio zone served by the amplifier.
ASC-2 Connections and Ratings
4 - 7
High level outputs:
25.2V RMS, 4.0A, 100W max
70.7V RMS, 1.4A, 100W max
Backup amplifier input:
1V RMS max
All wiring must be in accordance with
Article 760 of NEC or the local building
codes.
Electrical connections:
Some signal is lost in the zone wires
due to line resistance. Refer to the
tables below to determine the decibel
loss for various wire gauges and
lengths. A reduction in load reduces
the loss. Use the largest wire size
possible for the smallest loss.
SPEAKER ZONE DECIBEL LOSS
for 25.2V RMS, 35W load
Length
Gauge
14 AWG 16 AWG 18 AWG
(feet) (loss in decibels)
200 0.2 0.3 0.6
400 0.5 0.7 1.1
600 0.7 1.1 1.6
800 0.9 1.5 2.2
1000 1.2 1.8 2.7
SPEAKER ZONE DECIBEL LOSS
for 70.7V RMS, 25W load
Length
Gauge
16 AWG 18 AWG
(feet) (loss in decibels)
200 0.04 0.06
400 0.07 0.11
600 0.11 0.17
800 0.14 0.22
1000 0.18 0.27
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