AMAT 0100-00389 Relay card

AMAT 0100-00389 Relay card

If AMAT 0100-00389 short–circuit or an overload has occurred on an output channel, the involved channel will be switched off as a reaction on a high temperature of the switching transistor. In certain intervals, the module then tries to switch on the channel again. Before every switching–on trial, the signal at all channels will be interrupted for a period of ca. 20 µs. This is also valid for those channels which are not involved in the overload or short–circuit event. After the short–circuit or overload has been eliminated, the involved channel can operate immediately again. The red LED ”Overload” goes out. 

Error message to the master: In case of a short–circuit or an overload, an error message is sent to the master, along with the error code No. 4. In each case, the channel No. 0 is given as faulty, independent of the really involved channel. The error message is kept up for a period of at least 5 seconds, even if the short–circuit or overload has been remedied in a shorter time. Fur further information concerning diagnosis, see the descriptions of the central units and couplers used as bus masters.

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