By: Crestron
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8 Relay and 4 Digital/Analog Input Module

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.


Available Configurations Include:

STI-IO Cresnet Module with 8 Relays and 4 Analog/Digital Inputs - International Version, 230V. Includes PWI-1215 Power Supply



  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)
  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
Power Requirements
  Power Pack 0.5 Amp @ 12 Volts DC;
120 Volts AC, 60 Hz power pack, model PW-1205, included
  Cresnet Power Usage 6 Watts (0.25 Amp @ 24 Volts DC) with no power pack connected
  Temperature 41° to 113°F (5° to 45°C)
  Humidity 10% to 90% RH (non-condensing)
  Chassis Metal, black finish
  Faceplate Extruded aluminum, black finish with polycarbonate label overlay
  Mounting Freestanding or 1U 1/2-width 19-inch rack-mountable (adhesive feet included, ST-RMK rack kit sold separately)
  Height 1.80 in (46 mm);
1.70 in (44 mm) without feet
  Width 7.07 in (180 mm)
  Depth 6.32 in (161 mm)
  1.96 lb (0.89 kg)
  All the features and specifications of the ST-IO except:
  Power Requirements
  Power Pack 0.5 Amp @ 12 Volts DC;
230 Volts AC, 50 Hz power pack, model PWI-1215, included
  Cresnet Power Usage 6 Watts (0.25 Amp @ 24 Volts DC) with no power pack connected

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Prices and specifications subject to change without notice.