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I/O Module LEDs
The ERR LED indicates an I/O module fault and errors. It will remain lit until all the errors
have been eliminated. Diagnostic and error messages can be retrieved from the module using
the ACE3600 STS Error Logger or SW Diagnostics. For more information, see the ACE3600
STS User Guide.
The I/O status LEDs in Digital Input (DI) and Digital Output (DO) modules indicate ON and
OFF (LED lit when the I/O is ON.) In Analog Input (AI) modules, each input has two LEDs,
indicating Overflow (OF) and Underflow (UF). In Analog Output (AO) modules, each output
has three LEDs, indicating voltage output (Vout), current output (Iout), and calibration (Cal).
In the 8 DO Select Before Operate (SBO) module, the Controlled DO LED (CDO) indicates
whether 12V is controlled or not.
Note: In the 8 DO SBO module, if the DO LED is blinking, this indicates that the two relays of
this output are not in the same state. This means that there is a malfunction.
I/O Module Test
The I/O modules can be tested using the STS Hardware Test utility. For more information, see
the ACE3600 STS User Guide.
The I/O module LEDs can be tested using the STS Hardware Test utility– all the LEDS are lit
for a number of seconds, and then turned back to their previous state.
ERR
1
UF
OF
2
UF
OF
3
UF
OF
4
UF
OF
5
UF
OF
6
UF
OF
7
UF
OF
8
UF
OF
24V
Figure 5-2 ACE3600 I/O Module – Front Panel (without TB Holder)
1
2
3 3
4
5
6
7
8
9
10
11
12
13
14
15
16
5-2
I/O Modules
ERR
1
UF
OF
2
UF
OF
3
UF
OF
4
UF
OF
5
UF
OF
6
UF
OF
7
UF
OF
8
UF
OF
24V
9
UF
OF
10
UF
OF
11
UF
OF
12
UF
OF
13
UF
OF
14
UF
OF
15
UF
OF
16
UF
OF
24V
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