Tripp Lite S3M20K-20K4T Owner's Manual

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7. Communications

7.4 RS-232 Communication Port Denition

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 S3M10-20kVA 3-Phase MODBUS Owner’s Manual. The

MODUBS manual may be downloaded from the specic S3M10-20K UPS model page at Tripplite.Eaton.com.

The RS-232 port is a male 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

7.5 RS-485 Communication Port Denition

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 S3M10-20kVA 3-Phase MODBUS Owner’s Manual. The

MODUBS manual may be downloaded from the specic S3M10-20K UPS model page at Tripplite.Eaton.com.

The RS-458 Port is a female connector.

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Tripp Lite S3M20K-20K4T 3-Phase 208V UPS + Input Isolation Transformer Kit - 480V Delta to 208V Wye, 20kVA/kW, 3 Internal Strings