External Attenuator Control Wiring; 4-Wire System Connection - Toa SV-200M Instruction Manual

19. EXTERNAL ATTENUATOR CONTROL WIRING

19.1. 4-Wire System Connection

VM amplifier
ATTENUATOR
CONTROL*
EXTERNAL SP INPUT
DIRECT OUT
* This figure shows the relay operation status when the VM amplifier's power is switched off, when it is making
All-zone or emergency broadcast or when its broadcast is cut off due to control from external equipment in
emergency broadcast mode.
34
ATTENUATOR CONTROL relay contact capacity
Withstand voltage: 30 V DC, 125 V AC
Contact current:
N1 (NC)
C
N2 (NO)
H
C
H
H
ZONE 1
C
H
ZONE 2
C
H
ZONE 3
C
H
ZONE 4
C
H
ZONE 5
C
Under 7 A (DC), under 7 A (AC)
+
External DC power supply
to activate attenuators
–
External attenuators
H
C
ZONE 1
Relay control
H
C
ZONE 2
Relay control
H
C
ZONE 3
Relay control
H
C
ZONE 4
Relay control
H
C
ZONE 5
Relay control