Interface: Conforms to RS-232

Signals supported		Pin No.
TD	Transmit Data	2
RD	Request Data	3
RTS	Request to Send	4
GND	Ground	7

RS-485: Conforms to RS-485 specification.

Connectors: RS-232: DB25 pin male RS-485: 4 terminal block, 2 terminals for daisy chaining

Indicators: LCD indicating TD, RD, RTS, CTS, DSR, DCD and DTR

Switches: DTE/DCE selector switch: allows reversing Pins 2 and 3 of RS-232 connector. Four position dip switch: 2 switches set operating mode and 2 switches set cable termination value

Data Rate: 0 to 38.4 KBPS

Transmission: Differential voltage in compliance with EIA RS-485

Power: 110 Volts AC, 60 Hz 20 VA. 220 V, 50 Hz optional. May also be powered via pins 9 & 10 of RS-232 connector - +12 volts DC @ 50mA., -12 Volts DC @ 20mA

Size: 2" x 4.1"L x 0.8"H

Environment: 0° to 50° C, 0% to 95% RH