English
The serial interface of the basic CH1 module of basic modules (except for the CP-1003) is firmly fitted with the RS-232 interface without galvanic isolation (i.e. the interface signals have galvanic connection with the module power supply by the CIB interface, the TCL2 and the analogue inputs in the basic CP-10xx module). A view of the terminal block (in standard operating position of PLC on the control panel) is shown in Fig. 1.
Fig. 1 Terminal block A – connection of the interface CH1, RS-232.
Notes:
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Signal ground GND of the interface is a common terminal for the module power supply, the CIB bus and the TCL2 (it is also common with the negative common terminal of DI/AI inputs).
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The basic CP-1000 module has the GND terminal also available at A6 terminal.
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RTS is a control signal (output), which is used by some devices (interface converters, etc.). Using the signal is described in the manual Serial communication of TXV 001 06 programmable control units.