Figure 167: Rp1 Physical Connection - GE P24DM Technical Manual

Chapter 19 - Commissioning Instructions P24xM
connected equipment beyond any suppied protocol converter. It verifies operation of the rear communication port
(and if applicable the protocol converter) and varies according to the protocol fitted.
5.2.10.1 CHECK PHYSICAL CONNECTIVITY
The rear communication port RP1 is presented on terminals 54 and 56. Screened twisted pair cable is used to
make a connection to the port. The cable screen should be connected to the earth link just below pin 56:
E01402

Figure 167: RP1 physical connection

For K-Bus applications, pins 54 and 56 are not polarity sensitive and it does not matter which way round the wires
are connected. EIA(RS)485 is polarity sensitive, so you must ensure the wires are connected the correct way round
(pin 54 is positive, pin 56 is negative).
If K-Bus is being used, a Kitz protocol converter (KITZ101, KITZ102 OR KITZ201) will have been installed to convert
the K-Bus signals into RS232. Likewise, if RS485 is being used, an RS485-RS232 converter will have been installed.
In the case where a protocol converter is being used, a laptop PC running appropriate software (such as MiCOM S1
Agile) can be connected to the incoming side of the protocol converter. An example for K-bus to RS232 conversion
is shown below. RS485 to RS232 would follow the same principle, only using a RS485-RS232 converter. Most
modern laptops have USB ports, so it is likely you will also require a RS232 to USB converter too.
408 P24xM-TM-EN-2.1