Chapter 3 Mechanical and Electrical Installation
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DO Wiring
When the digital output terminal must drive the relay, it is necessary to install an absorption diode across the
relay coil. This diode prevents inductive switching transients causing damage to the DC 24V power supply. The
absorption diode must have a forward current rating of 50 mA.
Make sure to install the polarity of the absorption diode correctly, as shown in Figure 3-21. Otherwise, the 24 VDC powe
supply will be immediately burnt once the digital output terminal has output.
Note that CME and COM are internally insulated, but are shorted externally by a jumper. In this case, DO1 is driven by
+24 V by default. Remove the jumper if you need to apply external power to DO1.
Figure 3-21 DO wiring of the CS200
DO
CME
COM
Relay Diode
CS200
+24V
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