07KT97 GJR5253000R0270 ABB Central Processing Unit PLC Systems

07KT97 GJR5253000R0270 ABB Central Processing Unit PLC Systems

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Description:

The basic unit 07 KT 97 R200 is the standard device for all applications. In addition, there are basic units with reduced performance (e.g. 07 KT 95 or 07 KT 96) as well as ones with extended performance (e.g. 07 KT 97 R260 with ARCNET connection, 07 KT 97 R0220 with PROFIBUS connection and 07 KT 97 R0262 with both ARCNET and PROFIBUS connection). A comparison table is given on page 3. This document describes the basic unit 07 KT 97 R200 and then adds the data sheets of the other devices which only show the differences.

Differential inputs are very useful, if analog sensors are used which are remotely non-isolated (e.g. the minus terminal is remotely earthed). Since the earthing potential is not exactly the same as AGND1, it has to be measured bipolar in order to compensate measuring errors. Additionally, in case of singlepole configuration, AGND1 would be connected directly to the remote earth potential. This would cause inadmissable (and possibly dangerous) earthing loops.

In all configurations using differential inputs two adjacent analog inputs belong together (e.g. EW 6,00 and EW 6,01).The measured value is calculated by subtraction. The value of the channel with the lower address is subtracted from the value of the channel with the higher address.

If the terminals are used as digital outputs, the output signals "1" are individually monitored by the re-readable input. If the output status is wrong, an overall error message is generated for the involved output group. The error is displayed by the red LED Ovl. and by error flags of the PLC then. The error could have been caused by overload, short-circuit or missing supply voltage UP5/ZP5. The technical specifications of the outputs are the same as with the other digital outputs.

Datasheet Link:

ABB 07KT97 GJR5253000R0270.pdf