The ST-IO is a Cresnet® expansion module that provides eight low-voltage relay outputs and four digital/analog input ports. Typical applications include control of lighting, screens, drapes, and more. In "closure" mode, each input port will sense a contact closure signal from a door switch, motion sensor, etc., and can also accept analog 0-24 Volt DC signals when in "voltage" mode. The ST-IO may be used to provide a low-voltage control interface at a remote location, or may be rack mounted in the central equipment cabinet to expand the number of control system ports (ST-RMK rack mount kit sold separately). Communication with the control system is via a single Cresnet connection.

CONNECTORS

•  RELAY OUTPUT 1 – 8 (1) 16-pin 5mm detachable terminal block comprising (8) normally open, isolated relays; Rated 1 Amp, 30 Volts AC/DC maximum; 100µA, 100mV minimum
•  DIGITAL IN 1 – 4 (1) 5-pin 5mm detachable terminal block comprising (4) digital or analog input ports (referenced to GND); Digital Input (closure mode): Input threshold 2 Volts DC (±0.5VDC); input impedance 1k ohms to +5VDC; 5 Volt, 1k ohms pull-up resistor and protection diode per pin; Analog Input (voltage mode): Input threshold 2 Volts DC (±0.5VDC); voltage range 0-24 Volts DC; input impedance 44k ohms
•  NET (2) 6-pin RJ11 female, Cresnet slave ports, paralleled; Connect to Cresnet control network
•  12VDC (1) 2.5mm barrel DC power jack; 12 Volt DC power input (PW-1205 power pack included)

INDICATORS

•  PWR (1) green LED, indicates power supplied from Cresnet network or local power pack
•  NET (1) amber LED, indicates communication with Cresnet system
•  INPUT 1 – 4 (4) red LEDs, indicate a high signal at each corresponding digital input port
•  RELAY 1 – 8 (4) red LEDs, indicate a closure at each corresponding relay output port