UT268SM-ST2

RS-232/485 Serial to Fiber Converter Single mode dual fiber ST 20km 1310nm

(FC/SC/ST Connector optional )

1. Overview

Model UT268 series is a sort of more function and economy RS-485/422 interface optic fiber MODEM. It is the best choice to connect RTU to HOST or SCADA controller. It used Optic fiber as transfer medium, increase the transfer function of system. Communication equipment abstain menace effective to lightning strike, surge, electromagnetism disturb under the secure environment.

2. Function and Characteristic

a) Support RS-485/RS-422 interface

b) Asynchronous, point to point, rate up to 120Kbps

c) Support 5V DC power input

d) 1500W surge protection, 15KV static protection

e) RS-485/422 port support 32 node (can choice hand-tailor 128 Node)

f) Working wavelength: 1310nm

g) Auto test signal rate, zero delay auto transmit

3. Performance guideline

Interface: support EIA RS-485, RS-422 standard

Rate: 0-120Kbps

Transmit distance: RS-485/422 port 1200m, optical port multi-mode 2KM, single-mode 20KM~80KM

Working environment: -15℃ to 60℃

4. Appearance guideline

Interface type: 5 bit terminal block (RS-485/422), multi-mode choice ST/SC/FC interface, single-mode choice FC/SC/ST interface

L*W*H: 100mm*69mm*22mm

Shell: Iron

Color: White

Weight: 230g

5. Pin define

Optical fiber interface

IN --------- Optical fiber input

OUT --------- Optical fiber output

RS-422 port

T+ --------- RS-422 Send +

T- --------- RS-422 Send -

R+ --------- RS-422 Received +

R- -------- RS-422 Received –

GND --------- Ground

RS-485 port

D+ --------- RS-485+

D- --------- RS-485-

GND --------- Ground

6. Indicator light explain

Power: Power indication

RxD: Optical fiber interface receive indication

TxD: Optical fiber interface send indication

• Order Information

(Remark: ST/SC/FC Fiber connector Optional; optical distance:20/40/60/80km optional)