TOA Electronics VM-2120 instruction manual Surveillance I/O Connector Functions

22. SURVEILLANCE I/O CONNECTOR FUNCTIONS

The rear panel Surveillance I/O connector* permits "Speaker Line Reference Impedance Measurement (Initial Setting)" and "Speaker Line Check" to be enabled and monitored by connected external equipment. Referring to the pin arrangement and functions, prepare the matching D-sub male connector (screw-lock type) for connection to the external equipment. (See p. 11 No. 41 SURVEILLANCE I/O connector.)

* Requires installation of the optional SV-200M Surveillance Board.

SV-200M's D-sub female connector

13 SURVEILLANCE I/O 1

Locking nut: 4-40 UNC

2514

SURVEILLANCE I/O connector pin function table

Pin		Signal name	IN	Signal/logic	Function/status
No.			/OUT
1	Zone 1 short		OUT	Active Low	Zone 1 speaker line is shorted.
2	Zone 1 Disconnection		OUT	Active Low	Zone 1 speaker line is disconnected.
3	Zone 2 short		OUT	Active Low	Zone 2 speaker line is shorted.
4	Zone 2 Disconnection		OUT	Active Low	Zone 2 speaker line is disconnected.
5	Zone 3 short		OUT	Active Low	Zone 3 speaker line is shorted.
6	Zone 3 Disconnection		OUT	Active Low	Zone 3 speaker line is disconnected.
7	Zone 4 short		OUT	Active Low	Zone 4 speaker line is shorted.
8	Zone 4 Disconnection		OUT	Active Low	Zone 4 speaker line is disconnected.
9	Zone 5 short		OUT	Active Low	Zone 5 speaker line is shorted.
10	Zone 5 Disconnection		OUT	Active Low	Zone 5 speaker line is disconnected.
11	Ground fault		OUT	Active Low	Some of speaker lines are grounded.
12	Power amplifier failure		OUT	Active Low	Power amplifier is faulty.
13	Setting/checking busy		OUT	Active Low	During measurement of the speaker line
					reference impedance (Initial setting) or during
					check of the speaker lines.
14	Initial setting error		OUT	Active Low	The speaker line reference impedance
					couldn't be measured successfully.
					(The measured impedance exceeds the
					expected range or is unstable.)
15					Not used.
I
22
23	Speaker line check		IN	One-shot make	Check of the speaker line impedance starts.
	activation
24	Speaker line initial		IN	One-shot make	Measurement of the speaker line reference
	setting activation				impedance (Initial setting) starts.
25					Not used.

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