WEIHONG PM53B, Руководство производителя

Страница: 16 / 42

Specialized Concentrated Focused
「
6
」
Wiring
3 Wiring
3.1 Signal Types
3.1.1 Binary Input Signal
Binary input signal is active low; it supports NO (Normally Open) and NC (Normally Closed) input
signals (by modifying the polarity of input ports in the software). When using a NO switch, the signal is
available as connecting with COM; when using a NC switch, the signal is available as disconnecting
with COM.
When the mechanical switch connects with binary input signal, one end of the mechanical switch
connects to the binary input port and the other end to GND, as shown in Fig. 3-1:
GND
IN
24V
I/O Board Card
Fig. 3-1 Connection between Mechanical Switch and Binary Input Signal
The binary input signal can also be connected with a photoelectric switch or proximity switch of NPN
(NO) or NPN (NC) type. The connection diagram is shown below in Fig. 3-2:
24V
COM
IN
24V
I/O Board Card
External Input
Recommended
10K
Fig. 3-2 Connection between Binary Input Signal and Photoelectric Switch (or Proximity Switch)
3.1.2 Relay Output Signal
The relay output contact points on the terminal board have load capacity: 10A/250VAC and