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SS20 Electrical Specifications

General Specifications
Input Power 10-30VDC
Power Connector 4 position Removable Terminal Block
Input Current Max 2A fused
Quiescent Current (Q)
Vin = 24V
8.5mA
4.6mA (RS-485 disabled)
Typical operating Current *
Vin = 24V
6.8mA (RS-232 Output, RS-485 disabled)
10.6mA (RS-485 Output)
Operating Temp -40 to +70 °C
ESD Protection +/-15KV on all ports
Approvals CSA Class I Div 2 Group C, D T3C
Suitable for use in Class I Zone 2, IIB T3C
Relay Output 1-Form-C OptoMOS Solid State Relay
Relay Max Current 170mA
Relay Max Voltage 250V
* measured sending requests for full length responses from 2 hosts at 9600baud as fast as possible.
Serial Specifications
Configuration GUI Software via USB interface
Data Rate 1200 to 115200 bps
RS-232 Connections Tx, Rx, GND, RTS
RS-232 Connector 4 position Removable Terminal Block
RS-485 Type 2-wire Half Duplex
RS-485 Connections Data A(-), Data B(+), Isolated GND
RS-485 Connector 4 position Removable Terminal Block
RS-485 Isolation >2000V / port
RS-485 Bus Loading up to 256 devices (1/8 UL)
RS-485 Bias 560Ω x2 Internally switchable (default off)
RS-485 Termination 120Ω Internal, Software Selectable
USB Connector High retention force industrial USB-B
USB Driver VCP (FTDI) provided
LED Indication STATUS/ALARM, IN Rx, OUT Tx, OUT Rx
(all LEDs Red/Green/Amber)
GREEN = COM1 Data, RED = COM2 Data
Mechanical Specifications
Enclosure DIN Rail mount vertical vented plastic
Dimensions Height: 4.5in (114mm)
Width: 4.25in (108mm)
Thickness: 0.9in (23mm)
Terminal Blocks Type: 4 position pluggable/removable
Wire Size Accepted: 24AWG to 12AWG
Connection Method: Screw
electrical.txt · Last modified: 2017/07/23 21:38 by dmeier