Title: +038=360.000-OU045T_04-PCD2.m4160 PLS SBC - IO Manual.pdf
For reasons of safety it is not permissible to connect low voltages (up to 50 V) and higher voltages (50 … 250 V) to the same module.If a Saia PCD® module is connected to a higher voltage (50 … 250 V), approved components for this voltage must be used for all elements that are electrically con- nected to the system.Using higher voltage (50 … 250 V), all connections to the relay contacts must be connected on the same circuit, i.e. in such a way that they are all protected against one AC phase by one common fuse. Each load circuit may also be protected individually.I/O modules and I/O terminal blocks may only be plugged in and removed when the Saia PCD® and the external +24 V are disconnected from the power supply.In the appendix, Chapter A.4 relay contacts, are calculation data and wiring sug- gestions for the relay contacts. These data should be absolutely considered for safe switching and a long life span of the relays.5-33PCD2.A2005.5.1