GPIO External Timer Control Logic
Name
INPUTS
START Command
STOP Command
RESET Command
FREEZE Command
FREEZE Lamp
OUTPUTS
START Pulse
STOP Pulse
RESET Pulse
FREEZE Pulse
Not used.
POWER & COMMON
Source Common
Logic Common
Logic + 5 Volt supply
Source Supply
NOT CONNECTED
Pin
11
12
13
14
15
1
2
3
4
5
7
8
9
10
6
OUTPUT
COMMON
OUT
RETURN
N/C
ØV (GND)
SOURCE
8
7
6
15
14
13
IN
IN
IN
5
4
3
©2016 Axia Audio- Rev 1.8.1
Type
Active Low Input
Active Low Input
Active Low Input
Active Low Input
Active Low Input
Open Collector to Logic Com-
mon Return
Open Collector to Logic Com-
mon Return
Open Collector to Logic Com-
mon Return
Open Collector to Logic Com-
mon Return
Open Collector to Logic Com-
mon Return
Logic Common
Internal 5 Volt return
Logic Supply, Individually
Fused
Common for all 5 inputs
OUT
OUT
OUT
OUT
5
4
3
2
1
5
4
3
2
1
12
11
10
9
IN
IN
IN
+5 V
2
1
COM
POWER
+
SOURCE
Notes
Starts timer.
Stops timer.
Resets timer.
Holds timer display while
active
Illuminates while timer is
frozen
A 100 mS PULSE sent when
Timer is started.
A 100 mS PULSE sent when
Timer is stopped.
A 100 mS PULSE sent when
Timer is reset.
A 100 mS PULSE sent when
Timer is frozen.
Connect to ground of source
device or to Pin 8
Can be connected to Pin 7 if
source is not providing com-
mon
Can be connected to Pin 10
if source is not providing
voltage; active only when
source has been assigned to
channel.
Connect to power supply of
source device or to Pin 9
GPIO v."ZA" 4/2009
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