ESPEC EHS-211M - Specifications; About RS-485 Communications; RS-485 Signal Assignment; About RS-485 Specifications

Chapter 5 Specifications
5.1 Specifications
About RS-485 Communications
■RS-485 signal assignment
Table 5.1 RS-485 signal assignment
Pin No. Signal code Signal Connection status
1 SD+ Transmission data (A) Connected
2 SD- Transmission data (B) Connected
3 RD+ Reception data (A) Connected
4 RD- Reception data (B) Connected
5 GND Ground Connected
6 GND Ground Connected
7 NC (Not connected) Not connected
8 NC (Not connected) Not connected
9 NC (Not connected) Not connected
■About RS-485 Specifications
•
Addresses
Settable from 1 to 16 (Max. 16)
•
Communication System
Synchronized modulation (Four-wire, half-duplexing)
•
Transmission Rate
Selectable between 4800, 9600 and 19200 bps. Can be selected from the
instrumentation panel. It is not necessary to restart the system after changing
the transmission rate.
•
Max. Cable Distance
Total extended length: 500 m
•
Data Bit
Data length 7/8
Stop bits 1/2
Parity check None/Even/Odd
Can be selected from the instrumentation panel. It is not necessary to restart
the system after changing the data bit.
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