Crestron ST-IO, Operation Manual

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Crestron ST-IO Input/Output Module
Input/Output Module: ST-IO
Introduction
Features and Functions
There are two Crestron
®
Input/Output Module configurations available: ST-IO and
STI-IO. Configuration differences depend on which power pack is used. The ST-IO
is supplied with a power pack for a 120V AC supply and the STI-IO is supplied with
a power pack for 220VAC. For purposes of this Operations Guide, the term ST-IO is
used for either configuration.
The ST-IO device has eight relays and four digital voltage/closure inputs. As part of
the Cresnet system, use of an external power pack is optional. This unit can operate
using the Cresnet
®
voltage or an external power supply.
NOTE: When connected to both the Cresnet power and the external power supply,
the Cresnet power is disconnected.
The ST-IO module incorporates eight relays that can be connected to controllable
devices. The eight normally open relays are isolated from one another.
The ST-IO also incorporates four digital inputs that can operate in one of two
modes: closure and voltage. The input mode is configured using internal jumpers.
The ST-IO is set to closure mode when shipped.
•
In closure mode, the ST-IO detects switch/relay closures to ground (closed
= logic 1 and open = logic 0). The inputs are connected to 5 VDC via a
1.0K ohm “pull-up” resistor and protection diode.
•
In voltage mode, the ST-IO detects active voltages (voltages > 2.5V = logic
1 and voltages < 1.5V = logic 0). The mode for these inputs is selectable via
internal jumpers.
Refer to “Digital Input Modes” on page 7 for a description to change digital input
mode.
Functional Summary
•
Eight isolated normally open relays
•
Four digital inputs operating in closure mode or voltage mode
•
Two network connectors for daisy-chaining units
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Rack mountable with optional ST-RMK (1 space height)
Operations Guide - DOC. 5675A Input/Output Module: ST-IO
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