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©2016 Axia Audio- Rev 1.8.1
GPIO Recording Device Logic
Name
Pin
Type
Notes
OUTPUTS
Rec ON Lamp
1
Open Collector to Logic Com-
mon Return
Active whenever Record Mode
is engaged.
Rec OFF Lamp
2
Open Collector to Logic Com-
mon Return
Active whenever Record Mode
is NOT engaged.
Not used
3
Open Collector to Logic Com-
mon Return
n/a
START Pulse
4
Open Collector to Logic Com-
mon Return
A 100 mS PULSE sent when
Record Mode is engaged.
STOP Pulse
5
Open Collector to Logic Com-
mon Return
A 100 mS PULSE sent when
Record Mode is disengaged.
POWER & COMMON
Source Common
7
Logic Common
Connect to ground of source
device or to Pin 8
Logic Common
8
Internal 5 Volt return
Can be connected to Pin 7 if
source is not providing com-
mon
Logic + 5 Volt supply
9
Logic Supply, Individually
Fused
Can be connected to Pin 10
if source is not providing
voltage; active only when
source has been assigned to
channel.
Source Supply
10
Common for all 5 inputs
Connect to power supply of
source device or to Pin 9
NOT CONNECTED
6
8 7 6 5 4 3 2 1
15 14 13 12 11 10 9
ØV (GND)
SOURCE
OUTPUT
COMMON
RETURN
OUT
5
OUT
2
OUT
3
OUT
4
OUT
1
N/C
IN
5
IN
4
IN
3
IN
2
IN
1
IN
COM
+
+5 V
POWER
SOURCE
GPIO v. 1/2012
