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![](https://files.manualsfile.com/87314326-s3m50k-60k6t/bg4a.png)
74
6. Communications
6.4 RS-232 Communication Port Denition
Notes:
• The USB, RS-232 and RS-485 interfaces cannot be used simultaneously. Only one interface (USB, RS-232, or RS-485) may be
used at a time. Using any of these interfaces does not interfere with the use of the WEBCARDLXMINI.
• These three communication ports use a MODBUS protocol. Refer to the S3M10-20kVA 3-Phase MODBUS Owner’s Manual.
The RS-232 port is a female connector.
Connection Between the Connected Computer’s RS-232 Port and UPS System’s RS-232 Port
Computer RS-232 Port UPS RS-232 Port
Pin 2 Pin 2 UPS send, PC receive
Pin 3 Pin 3 PC send, UPS receive
Pin 5 Pin 5 Ground
Available Functions of the RS-232 Port
• Monitor UPS power status
• Monitor UPS alarm data
• Monitor UPS run parameters
• Timing o/on setting
• One-to-one communication, UPS to computer, at a distance less than 5 m
RS-232 communication data format
• Baud rate: 9600 bps
• Byte length: 8 bit
• End bit: 1 bit
• Parity check: None
6.5 RS-485 Communication Port Denition
Notes:
• The USB, RS-232 and RS-485 interfaces cannot be used simultaneously. Only one interface can be used at a time.
• These three communication ports use a MODBUS protocol. Refer to the S3M25-100kVA 3-Phase MODBUS Owner’s Manual.
• This port may also be used with an external battery thermostat. Refer to section 6.6 BAT_T Communication Port Denition.
The RS-485 Port is a female connector.
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