Relay interface module
SIO-RM4 Sentera Thracia

The SIO-RM4 converts a 0-10 Vdc or 0-20 mA analogue input into a four relay output. It is intended to be used with most BMS controllers with 0-10 Vdc/0-20 mA output. In addition these modules can also be connected to a network with RS-485 interface (Modbus RTU).

The module can be configured in different operating modes: Binary, Staged, Sequenced and Raise/Lower. LED’s are used to indicate the relay status and On/Off/Auto switches can be used to override the functionality. The SIO-RM4 is designed to fit onto a DIN rail. It can be used as a slave control for our speed controller range with 0-10 Vdc/0-20 mA output or with room switches and duct sensors.

Analog input signal: 0-10 Vdc/0-20 mA, selectable by slide switch
Relay contacts and rating: 4 x SPCO/8 A at 230 Vac (resistive load)
RS-485 interface (Modbus-RTU)
DIN rail mounting
Power supply : 18-32 Vdc/12-18 Vac
Input impedance in voltage mode: 93 KOhm
Input impedance in current mode: 250 Ohm
Hysteresis:+/- 0.2 Vdc
Red LED indication for power supply status
Green LED indication for relay status (on/off)