ABB 7320 Series Instruction Manual page 11

3 ELECTRICAL CONNECTIONS...
For AC applications the value of the resistor/capacitor network depends on the load current and inductance that is switched.
Initially, fit a 100R/0.022 µF RC suppressor unit (part no. B9303) as shown in Fig. 3.2A. If the instrument malfunctions (incorrect
readings) or resets (display shows 88888) the value of the RC network is too low for suppression – an alternative value must be
used. If the correct value cannot be obtained, contact the manufacturer of the switched device for details on the RC unit required.
For DC applications fit a diode as shown in Fig. 3.2B. For general applications use an IN5406 type ( 600V peak inverse voltage
at 3A – part no. B7363).
✶
Note. For reliable switching the minimum voltage must be greater than 12V and the minimum current greater than
100 mA.
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