14
NOTE 1
EOLR
NAC1
B+
A+
NAC2
B-
SHLD
4100-1259: 25V Constant Supervision NAC Adapter Card
4100-1260: 70V Constant Supervision NAC Adapter Card
SHIELD
SHLD
A-
SHLD
B+
A+
B-
SHLD
A-
SHLD
B+
A+
B-
A-
SHLD
NAC3
NOTE 1
EOLR
4081-9008 (25 V) EOL HARNESS 10K 1/2W
4081-9018 (70 V) EOL HARNESS 10K 1W
SPEAKER
SPEAKER
SPEAKER
EOLR
NOTE 1
EOLR
NAC1
B+
A+
NAC2
B-
SHLD
4100-1259: 25V Constant Supervision NAC Adapter Card
4100-1260: 70V Constant Supervision NAC Adapter Card
SHIELD
SHLD
A-
SHLD
B+
A+
B-
SHLD
A-
SHLD
B+
A+
B-
A-
SHLD
NAC3
NOTE 1
EOLR
SPEAKER
SPEAKER
SPEAKER
CLASS B WIRING
CLASS A WIRING
Figure 9. CSNAC Wiring
Amplifier Field Wiring,
Continued
Constant
Supervision NAC
(CSNAC) Wiring
1. Leave the 10 K resistors on the “B+” and “B-” terminals of unused circuits.
2. Remove the 10 K resistors from the “B+” and “B-” terminals on the card that hosts the CSNAC (amplifiers
and XSIG cards).
3. All wiring is between 18 AWG (0.8231 mm
2
) (minimum) to 12 AWG (3.309 mm
2
) (maximum).
4. Field wiring is power-limited.
5. Maximum speaker circuit current is 2 A per circuit.
6. Total available alarm power is 50 W (2 A @ 25 VRMS, 0.707 A @ 70.7 VRMS) or 35 W (1.4 A @ 25 VRMS,
0.5 A @ 70.7 VRMS) depending on the connected amplifier.
7. Shields, when required, are normally connected as shown. Alternate shield termination using earth ground
is provided on amplifier chassis.
8. Signal wiring must test free of grounds.
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