TOA Electronics VM-2120 instruction manual Attenuator C CONTROL*1

19.2. 3-Wire System Connection

Note: 3-wire system cannot be used with the SV-200M board.

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*1

N2 (NO)
EXTERNAL SP INPUT	H
	C	*2
DIRECT OUT	H
ZONE 1	H
	C

H

ZONE 2

C

H

ZONE 3

C

H

ZONE 4

C

H

ZONE 5

C

External attenuators

H (100 V)	ZONE 1
C (0 V)
EMERGENCY
H (100 V)	ZONE 2
C (0 V)
EMERGENCY
H (100 V)	ZONE 3
C (0 V)
EMERGENCY
H (100 V)	ZONE 4
C (0 V)
EMERGENCY
H (100 V)	ZONE 5
C (0 V)
EMERGENCY

*1 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.

*2 May be connected to any C terminal. (This C terminal is located closest to N1 terminal.)

43