ABB Module DSQC227 YB560103-CE ABB DSQC227 YB560103CE Robotics Axis Board New Sealed

ABB Module DSQC227 YB560103-CE ABB DSQC227 YB560103CE Robotics Axis Board New Sealed

Product Description:

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). For configuration, both inputs must be configured for the desired operating mode, see configuration table Fig. The measured value is calculated by subtraction. The value of the channel with the lower address is subtracted

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Product's Character:

The input impedance is ca. 330 Ω. The current input has a self-protecting mechanism. If the input current gets too high, the shunt is switched off and the value for range overflow is generated. About every second, the unit tries to switch on the shunt again. In this way the correct measurement
will succeed after the current has reached a normal value again. The trigger of the self-protecting mechanism is displayed by the red LED Ovl as long as the overload is present. Inthe PLC system an error message is then stored (FK4, error number 4). The following figure shows the connection of a 3-wire sensor powered by 24 V DC and of a 2-pole sensor powered electrically isolated. Both sensors work as active current sources 0...20 mA.

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