Tripp Lite S3M20K-20K4T Owner's Manual

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7. Communications

Connection Between the Connected Device’s RS-485 Port and UPS System’s RS-485 Port

Device (RJ-45) UPS (RJ-45) Description

Pin 1/5 Pin 1/5 485+ “A”

Pin 2/4 Pin 2/4 485 - “B”

Pin 7 Pin 7 +12Vdc

Pin 8 Pin 8 GND

Available Functions of the RS-485 Port

• Monitor UPS power status.

• Monitor UPS alarm info.

• Monitor UPS running parameters.

• Timing o/on setting.

• Battery environment temperature monitoring.

• Charging voltage modulation depending on batteries temperature

RS-485 Communication Data Format

• Baud rate: 9600 bps

• Byte length: 8 bit

• End bit: 1 bit

• Parity check: None

7.6 BAT_T Communication Port Denition

Note: The USB, RS-232 and RS-485 interfaces cannot be used simultaneously. Only one interface can be used at a time.

The BAT_T Port is a female connector. The external battery cabinet thermostat used for temperature charging

compensation may be connected to this port.

Connection Between the Temperature Sensor RJ45 Port and UPS RJ45 Port

Temperature Sensor (RJ45) UPS BAT_T (RJ45) Description

Pin 1/5 Pin 1/5 TX

Pin 2/4 Pin 2/4 RX

Pin 7 Pin 7 12V

Pin 8 Pin 8 GND

Available Functions of the BAT_T Port

• Battery environment temperature monitoring

• Charging voltage modulation depending on batteries’ temperature

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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