InteliATS
NT
PWR, SW version 2.5, ©ComAp – May 2015 90
IA-NT- PWR-2.5-Reference Guide.pdf
NOTE:
Use a cross-wired serial communication cable with DB9 female connectors and signals Rx, Tx, GND
for a RS232 connection.
HINT:
Make sure the grounding system on controller and PC – COM port (negative of the PC DC supply) are
identical – before the first direct connection. There must not be any voltage between these two points
otherwise the internal reversible fuse in controller burns out. The simple solution is to assure, that the
PC supply 240/20V is ground free (GND terminal is not connected).
Modem connection
A PC can be connected to the controller also remotely via modems. Either an analog, GSM or ISDN
modem must be connected to the RS232 interface and the setpoint COM1 Mode must be set to
MODEM.
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