ADPRO VM22A, Issue 6
9
5.5
VM22A Connections
Figure 2 shows the location of controls and connectors on the front and rear panel
of the VM22A Audio Switcher. The following tables show the connection details for
the Expansion I/O ports and Auxiliary I/O respectively.
FUNCTION
PIN
EXPANSION I/O PORT
EXPANSION I/O LOOP PORT
1
Audio input
Audio input
2
Audio output
Audio output
3
Do not connect
Do not connect
4
General alarm relay - common
Do not connect
5
Transmitter: Access/Secure input or
Receiver: PTZ input
Do not connect
6
Delayed Connect input
Do not connect
7
Binary output 1* or Serial Data
Binary output 1* or Serial Data
8
Binary output 3 (MSB)*
Binary output 3 (MSB)*
9
Ground
Ground
10
Ground
Ground
11
General alarm relay - normally closed
Do not connect
12
General alarm relay - normally open
Do not connect
13
Receiver: Press to Talk (PTT) input
Do not connect
14
Binary output 0 (LSB)* or Serial Clock
Binary output 0 (LSB)* or Serial Clock
15
Binary output 2* or Serial Strobe
Binary output 2* or Serial Strobe
(*) VM22 mode only
Table 1 - Expansion I/O and Expansion I/O Loop ports – 25-pin D connectors
PIN
FUNCTION – AUXILIARY I/O INTERFACE
1
General alarm relay - normally closed
2
General alarm relay - normally open
3
General alarm relay - common
4
Receiver: Press to Talk (PTT) input
5
Transmitter Delayed Connect input
6
Transmitter: Access/Secure input or Receiver: PTZ
input
7
Ground
Table 2 Auxilliary I/O Interface –7-way connector
NOTE
The Auxiliary I/O Interface is only available when the VM22A
chassis address switch is set to ‘0’.
