TOA Electronics VM-2120 External Attenuator Control Wiring, Wire System Connection

19. EXTERNAL ATTENUATOR CONTROL WIRING

19.1. 4-Wire System Connection

ATTENUATOR CONTROL relay contact capacity

Withstand voltage: 30 V DC, 125 V AC

Contact current: Under 7 A (DC), under 7 A (AC)

VM amplifier

		N1 (NC)
ATTENUATOR
			C
CONTROL*
	N2 (NO)
EXTERNAL SP INPUT			H
			C
DIRECT OUT
			H
ZONE 1			H
			C

H

ZONE 2

C

H

ZONE 3

C

H

ZONE 4

C

H

ZONE 5

C

+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

*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.

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