Connector Pinouts . . . continued
Notes:
• All switch inputs are active low (ie. connect to 0V to trigger). Inputs are pulled up internally to +4V via a 3K9
resistor. Inputs are also diode clamped to 0V and +4V to protect the input circuitry.
• All tallies are open collector pull-down using a 47R series resistor.
• Red Light tally contacts are via DIL relay. Contact rating is 100Vdc, 125Vac, 100mA max.
Do not use the output contacts to directly switch capacitive or reactive loads; always use an external relay
with a suitable contact rating.
Pinouts not shown:
• Serial ports 1 and 2 are for specific SSL equipment and their pinouts are therefore not included.
• The VGA connector follows the standard VGA pinout.
Red Light / Talkback / GP IO
Location: Centre Section Top Rear Panel
Connector Type: 25-way D-type female
Pin Description Notes:
1 Red Light Relay contact ‘A’ Normally open – follows Red Light switch. See Note below.
14 Red Light Relay contact ‘B’ ““““
2 0V
15 GP Input 1 (not used)
3 GP Input 2 (not used)
16 Monitor Cut
4 Monitor Dim
17 Slate Switch
5 Listen Switch
18 Red Light Switch
6 TB All Switch
19 FB A Switch
7 FB B Switch
20 Ext TB Switch
8 +4V Max 200mA
21 Slate Tally
9 Listen Tally
22 Red Light Tally
10 TB All Tally
23 FB A Tally
11 FB B Tally
24 Ext TB Tally
12 -
25 -
13 -
Appendices Page A-6 AWS 924-948 Owner’s Manual
C: Connector Pinouts
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