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Industrial RS-422/485 Repeater with Isolation


The ISC-1212-I is a RS-422/485 repeater which boosts the RS-422/485 signals to extend the reach distance up to 4000 ft (1200m) and increase the maximum number of connection up to 128 nodes. With a special circuitry, ISC-1212-I is able to automatically detect the data flow and switch the direction of the data lines accordingly. “Auto baud rate detector” enables ISC-1212-I to automatically configure RS-422/485 signals to any baud rate without external switch setting. Build in opto-isolations on ISC-1212-I provides 3000VDC of isolation to protect the host computer from destructive voltage spikes on the RS- 422/485 data lines. ISC-1212-I also offers internal surge-protection on the data lines. The internal high-speed transient suppressors on each data line protect the module from dangerous voltages levels or spikes. Therefore, the ISC-1212-I is a reliable RS-422/485 repeater and can satisfy most demand of operating environment.



•Automatic internal RS-422/485 bus supervision
•No external flow control signals required for RS-485
•Serial type support auto detect and switch
•Supported baud rate up to 115.2Kbps
•Reach distance up to 4000 feet (1200m)
•Support multiple baud rate and multiple data format
•Reserved space for termination resistors (R8,R9)
•Power and data flow indicator for troubleshooting
•Power requirement : +9 ~ 30VDC
•DIN-Rail and wall mounting enabled

ORing Media Converter Model ISC-1212-I
Physical Ports  
RS-422/485 Connector 10-pin terminal block
RS-422/485 Signals RS-422 : TX+, TX-, RX+
RX-RS-485 : Data+, Data-
Baud Rate 300 ~ 115.2 Kbps
Data bit 5, 6, 7, 8
Stop bit 1, 1.5, 2
Parity None, Even, Odd, Space, Mark
Flow Control XON/XOFF(software)
Auto Hardware Direction Control for RS-485
LED Indicators  
Power Indicator Green : Power LED x 1
TxD Indicator Green LED x 1
RxD Indicator Red LED x 1
Input Power +9 ~ 30 VDC power inputs on 10-pin terminal block
Power Consumption (Typ.) 0.7 Watts.
Physical Characteristics  
Enclosure IP-30
Dimensions (W x D x H) 71.2(W) x 25.3(D) x 100.6(H) mm (2.8x1x3.96 inch.)
Weight (g) 130g
Storage Temperature -25 to 85°C (-13 to 185°F)
Operating Temperature -10 to 70°C (14 to 158°F)
Operating Humidity 5% to 95% Non-condensin
Regulatory Approvals  
EMI FCC Part 15, CISPR (EN55022) class A,
EMS EN61000-4-2 (ESD), EN61000-4-3 (RS), EN61000-4-4 (EFT), EN61000-4-5 (Surge), EN61000-4-6 (CS), EN61000-4-8, EN61000-4-11
Shock IEC60068-2-27
Free Fall IEC60068-2-32
Vibration IEC60068-2-6
Warranty 2 years

Available Model
Model No. Description
ISC-1212-I Industrial RS-422/485 repeater with 3KV isolation