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UR75 User Guide
101
PIN
RS232*1
RS485*1
DI*2
DO*2
Description
1
TXD
---
---
---
Transmit Data
2
RXD
---
---
---
Receive Data
3
---
A
---
---
Data +
4
---
B
---
---
Data -
5
GND
---
GND
---
Ground
6
---
---
IN1
---
Digital Input1
7
---
---
IN2
---
Digital Input2
8
---
---
---
OUT1
Digital Output1
9
---
---
---
OUT2
Digital Output2
10
---
---
---
COM
Common Ground
Table 4-4-1 Pinouts Definition
RS232 adopts full-duplex communication. It’s generally used for communication within 20m.
RS485 adopts half-duplex communication to achieve transmission of serial communication data with
distance up to 1200 m.
Digital input of I/O interface is a logical variable or switch variable with only two values of 0 and 1. “0”
refers to low level and “1” refers to high level .
4.4.1 I/O
4.4.1.1 DI
This section explains how to configure monitoring condition on digital input, and take certain actions once
the condition is reached.
Figure 4-4-1-1
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