Industrial
Electronic Devices
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User Manual
Modbus TCP Slave / Modbus Master
Document code: MN67508_ENG Revision 1.100 Page 12 of 28
ETHERNET:
The Modbus TCP connection must be made using Connector3 and/or Connector4 of HD67508-A1-xxx with at least a Category 5E cable. The
maximum length of the cable should not exceed 100m. The cable has to conform to the T568 norms relative to connections in cat.5 up to
100 Mbps. To connect the device to a Hub/Switch the use of a straight cable is recommended. To connect the device to a PC/PLC/other the
use of a cross cable is recommended.
RS232:
The connection from a RS232 socket to a serial port (example one from a
personal computer) must be made with a NULL MODEM cable (a serial cable
where the pins 2 and 3 are crossed).
It is recommended that the RS232 cable not exceed 15 meters.
