Trip output (only for MTL4075 and MTLx575)

The trip output value function allows a ”true/false” interpretation directly through the converter.  The input signal is compared with a preset value (the trip value) and the result drives a transistor output as a binary signal.  In the case of ”true = higher as trip value”, the transistor will close (switch on) and correspondingly in the case of ”false = lower as trip value” the transistor will open (switch off).  In the case of a disturbance of the converter, the connection is interrupted and therefore a ”false” signal is also transmitted.  To avoid an unstable binary signal with small input value variation, hysteresis of the switching levels is implemented.

The trip point value and the hysteresis can be programmed as a percent of the measuring span configured under output data.

The permissible settings must fulfil the following conditions:

- trip output value 5.0 to 95.0[%] of the measuring range

- hysteresis 0.5 to 5.0[%] of the measuring range

The open collector transistor output can alternatively be configured for the thermocouple aging alarm function (Early Burnout Detection).

The PCS45 application prevents illogical trip output configuration.