Title: +038=360.000-OU045T_03-PCD2.m4160 PLS SBC - Hardware Manual.pdf
If the combined I/Os are used as outputs, the following should be noted: The LEDs of combined outputs I/O2...I/O5 only light up when the output is high and a supply voltage of 24 V is connected to Uext.Mixing the combined inputs/outputsIf combined I/Os are used as inputs in source operation, i.e. with sending devices which either apply +24 V to the input or are open, the low status of an open input can be overwritten as high if the corresponding output at the same address is set in error. However, if the input is shifted to 0 V with a changeover contact and the corresponding output is set in error, the MOS-FET can be destroyed, as it is not short circuit protected. For this reason, only positive-switching contacts should be used.Hardware Manual for the PCD2.M5 Series│Document 26/856; Version EN 09│2012-01-256-42Saia-Burgess Controls Ltd.Input/output (I/O) modulesPCD2.B100Input/output circuits and terminal designationA7A6A5E5A4E4s u B D C P6A3E3 E3A2E2E1E0A7A6