2
Introductions
Features
TRP-C28 provides 4 optical isolated digital input channels that allow you to input the logic signal from 0
to 30V DC and 4 power relays output . All channel features screw terminals for the convenience
connection of field signals as well as LED to indicate channel status. Each output power relay equips with
high surge current suppressors varistor to entirely protect your module and devices without damage when
irregularly high power voltage input. TRP-C28 can be configured and conduct self-test by outside dip-
switch without complicated setting and connection. Build-in a full set of command, watch-dog, auto reset
function the module can be bi-directionally remote controlled by RS485 protocol.
¾Wide range power input from +18V to +30V DC.
¾All communication's command are perform in ASCII.
¾Programmable in virtually any high-level language.
¾4-CH isolated digital input (with common power) and 4- CH power relay output.
¾Baud Rate can be set from 1200 to 115.2K bps.
¾High surge current suppressors varistor for relay.
¾LED display to indicate input and relay output channels and PWR/watchdog/RS485 status.
¾Dual Watchdog for hardware reset circuit and host operating status .
¾External switch for hardware self-test and module’s configuration.
¾Digital Input Isolation with power source (2500 Vrms).
¾Support screw terminal and standard external DC power adaptor.
Specification
¾Output Channel: 4 Channel Power Relay.
¾Relay type : 2 Form A (RL1,RL2) , 2 Form C (RL3,RL4).
¾Contact rating : 5A/30V DC , 5A/120V AC , 4A/250V AC.
¾Relay surge strength : 4000V.
¾Relay Operate time : 3mS.
¾Relay Min Life : 2*10(7) ops.
¾Input channel : 4 isolated input channels and counter.
¾Input isolation voltage : 2500Vrms.
¾Digital input level 0 : +1V Max.
¾Digital input level 1 : +4V ~ +30V.
¾Input impedance : 3KΩ.
¾Distance : RS485 up to 4000ft. (1250meters) .
¾Baud-Rate: 1200, 2400, 4800, 9600, 19.2K, 38.4K, 57.6K, 115.2K (bps).
¾Communication protocol : RS485 differential 2 half-duplex wires.
¾Format : Asynchronous data with any combination of bits, parity, stop.
¾RS-485 and input/output connector : Industrial plug-in screw terminal.
¾Power input : DC +18~30V.
¾Power consumption :2.7W (max).
¾Operating Temperature：-20 ℃to 65℃.
¾Storage temperature : -20 ℃to 65℃
¾Weight: 375g
¾Humidity : 5-95% non-condensing.
