LEDs
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COM-C | Communication Module
DOC021001DG12EN | Revision 12 | English | 2011-06 | Released | Public
© Hilscher, 2002-2011
4 LEDs
To get a fast overview about the status of the Module and the Communication two duo color LEDs
are placed on the Module respectively can be connected.
SYS defines the general status of the Module, means self test passed, firmware and configuration
loaded. On the Module we are using the colors yellow for hardware and basic function oriented in-
formation like self test passed, firmware loaded. Green is used for application oriented functions
like valid configuration loaded for that LED.
2nd Status LED shows communication errors or status and communication activities. If there is no
definition in the fieldbus standard we use red for error and yellow for status. If there is a definition
we use these for the functions and colors of that LED. For the Modules described in that revision of
the manual it is only for DeviceNet the case.
The outputs can drive max. 4 mA. If this is too less an external driver should be placed before the
LEDs.
The following schematic shows how to connect the LEDs.
In some cases the brightness of the LEDs of the duo color LEDs are so different that it makes
sense to use different resistors to make it equal. This is shown as an example for the LED COM.
The following figure shows the example how to connect the LED for COM-CN-ASM, COM-CN-
COM, COM-CN-COS, COM-CN-DNM, COM-CN-DNS, COM-CN-DPM, COM-CN-DPS and COM-
CN-CCS.
Figure 9: Example how to connect the LEDs COM-CN
This design is possible for all current COM modules except COM-CN-RE.
