Chapter 4 Wiring of Servo System
(3) PNP (source) mode
The external controller is the PNP common emitter output, the wiring mode is as shown in Fig. 4-5.
Fig.4-5 DI terminal PNP connection mode
Note: The NPN and PNP modes of multiple DI terminals of the same drive cannot be mixed.
2. Digital output circuit
The DO terminal is a double-ended output, which can have various output modes. There is no internal power
supply, and an external power supply must be used. Taking DO1 as an example, the interface circuits of
DO1-DO3 are the same.
(1) The host device is relay input
When the external device is a relay input, the wiring mode is as shown in Fig.4-6.
Warning: The inductive load (such as relay) shall be anti-parallel with the fly-wheel diode!
Fig.4-6 DO terminal connection relay wiring mode
(2) Drain (NPN) output
When the controller input is a drain input, the wiring mode is as shown in Fig.4-7.
Fig.4-7 DO terminal drain (NPN) output wiring mode
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