LACROIX Sofrel S4W - RS232 Communication Module; RS232 Communication Function; RS232 Technical Specifications

RS232 communication module
RS232 communication module
This module allows the RTU to communicate via RS232 link (with or without control signals) at an adjustable speed
between 300 and 115,200 bits/s. The RS232 module is protected against short circuits, polarity inversion and accidental connection to
voltage less than 24 V.
• RTS: ’Request to Send’ output
•

: 0V or GND
• RX: ’Data reception’ input
• TX: ’Data transmission’ output
•
CTS: ’clear to send’ input
Example of connection:
Technical specifications
- Cable:
- Use a ‘1 pair’ cable , SYT+ AWG24 ∅ = 5/10
ths
(100Ω resistance per kilometre)
- Use the twisted pairs of a cable with screen or shielding per pair of conductors.
- Connect the cable shielding to the Ground on one side only.
- Maximum length = 15 metres.
Remote terminal unit
MODBUS device (PLC or SCADA Central Station)
RS232 link