Industrial
Electronic Devices
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User Manual
Modbus TCP Slave / Modbus Master
Document code: MN67507_ENG Revision 2.400 Page 20 of 45
RS232:
The connection from 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.
The HD67507-A1/B2 is provided with a D-sub connector type DE-9 Male (also called DB-9). The cable must use a DE-9 Female connector.
The serial port is used for programming the device and for Modbus communication.
The HD67507-Slim-232 and HD67507-WiFi-B2-232 is provided with a 3way 5mm removable screw terminal.
The serial port is used for Modbus communication.
