Test Serial Communication Port Rp1; Figure 169: Rp1 Physical Connection - GE P642 Technical Manual

Chapter 19 - Commissioning Instructions
applying an appropriate signal to the input to which it has been assigned with the CLO Parameter setting, you will
get an appropriate DC signal if the output is enabled.
1. Enable the current loop input to be tested.
2. Note the CLIx minimum and maximum settings and the CLIx Input type for the application.
3. Apply a DC current to the current loop input at 50% of the CLI input maximum range, 0.5 mA (0 to 1 mA CLI),
5 mA (0 to 10 mA CLI) or 10 mA (0 to 20, 4 to 20 mA CLI).
4. Check the accuracy of the current loop input using the CLIO Input 1/2/3/4 cells in the MEASUREMENTS 3
column. The display should show (CLIx maximum + CLIx minimum)/2 +/-1% full scale accuracy.
5.2.13

TEST SERIAL COMMUNICATION PORT RP1

You need only perform this test if the IED is to be accessed from a remote location with a permanent serial
connection to the communications port. The scope of this test does not extend to verifying operation with
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.
5.2.13.1 CHECK PHYSICAL CONNECTIVITY
The rear communication port RP1 is presented on terminals 16, 17 and 18 of the power supply terminal block.
Screened twisted pair cable is used to make a connection to the port. The cable screen should be connected to pin
16 and pins 17 and 18 are for the communication signal:

Figure 169: RP1 physical connection

For K-Bus applications, pins 17 and 18 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 18 is positive, pin 17 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
422
P64x
P64x-TM-EN-1.3