If you want to expand the Foxtrot basic modules CP-10x4, 10x5-CP and CP-1000 with several binary inputs, or possibly also outputs, and at the same time the CH2 is not used, then you can use the PX-7811 and 7812 submodules.
N.B.: The PX-7811 and PX-7812 submodules cannot be used in the CP-10x6 and the CP-10x8 basic modules.
The PX-7811 submodule fitted in the CH2 position of the Foxtrot basic module makes it possible to capture up to seven 24 VDC binary signals with a common negative terminal, type 3 (the DI5 input is not used - it is not terminated on the terminal block). The submodule contains intelligent input circuits, which require 24 VDC external supply voltage. It is connected to the connector terminals of the basic module.
Fig. 1 The wiring diagram of the PX-7811 submodule inputs
The PX-7812 submodule fitted in the CH2 position of the Foxtrot basic module makes it possible to capture up to four 24 VDC binary signals with a common negative terminal, type 3 and switching up to three 24 VDC digital outputs with a common terminal +24 V (the DO1 output is not used - it is not terminated on the terminal block). The submodule contains intelligent input and output circuits, which require 24 VDC external supply voltage. It is connected to the connector terminals of the basic module.
There are semi-conductor outputs, with a maximum switching-current of 0.5 A for each output.
Fig. 2 The wiring diagram of the PX-7812 submodule inputs and outputs