Wrong AC supply wiring can destroy PCD7.L79x

FAQ #101241

Thanks to the analysis of returned modules we have found that several PCD7.L79x devices were damaged due to inconsistent polarity of the connected AC power supply. This can be the case if no attention is paid to the terminal indications "24V" and "GND".



A damaged communication port.

If GND and 24V are mixed on several units connected to the same S-Bus network, one or more serial communication interfaces of the module(s) are destroyed. Please make sure that all PCD7.L60x are connected the same way to the AC power supply as shown below:



PCD7 / Lxxx

Last update: 19.04.2015 15:22

First release: 22.06.2009 10:03

Views: 1795

The requested software / document is no longer marketed by Saia-Burgess Controls AG and without technical support. It is an older software version which can be operated only on certain now no longer commercially available products.