Electrical Installation
‑164‑
Wiring DO1
When the DO needs to drive a relay, connect a snubber diode on both sides of the
relay coil. Otherwise, the 24 VDC power supply may be damaged. Ensure that the
driving capacity does not exceed 50 mA.
Figure 8‑42 Wiring for the DO to connect to the relay
Note
● Connect the snubber diode with the polarity placed correctly. Otherwise, the 24
VDC power supply will be damaged upon the DO output.
● The digital output ground CME and digital input ground COM are internally
insulated, but are shorted externally by jumper as the factory settings. In this case,
DO1 is driven by +24V by default. To drive DO1 by external power supply, remove
the jumper between CME and COM.
DO1: Photocoupler isolation and bipolar open collector output
Output voltage range: 0 V to 24 V
Output current range: 0 mA to 50mA
DO1 supports bipolar output. The following wiring methods are available.
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