SST Automation GT200-HT-RS, User Manual

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3.4 Interface
3.4.1 Power Interface
GND
NC
24V+
1
2
3
Pin Function
1 Power GND
2 NC(Not Connected)
3 24V+, DC Positive 24V
3.4.2 RS-485/RS-422 Interface
The RS-485 interface of GT200-HT-RS is a standard one, and the RS-485 characteristics of the product are
shown as follows:
1. The basic characteristics of RS-485 transmission technology
①
Network topology: Linear bus, there are active bus terminal resistors at both sides.
②
Transmission rate: 1200 bps~115.2Kbps.
③
Media: Shielded twisted-pair cable and also can cancel the shielding, depending on environmental
conditions (EMC).
④
Site number: 32 stations per subsection (without repeater), and can increase up to 127 stations (with
repeater).
⑤
Plug connection: 3/5-pin pluggable terminal.
2. The main points on the installation of RS-485 transmission equipment
①
All the equipment are connected with RS-485 bus;