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®
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INPUT/OUTPUT POINT OPTION (-IO)
SMART-Sensor
™
models with the -IO option feature two TRIAC outputs (except SS-DUCT models have
solid-state relays that switch AC or DC), and two onboard dry-contact/10k thermistor inputs. These
inputs and outputs may be used to connect ancillary space-related field devices without consuming
inputs and outputs on the host controller.
FIGURE 63: INTERNAL VIEW OF A SS-S-IO AND SS-DUCT-IO
INPUTS
The SS-IO inputs may be used to connect either dry-contacts or 10 k thermistors. The field
devices wire directly to the input terminal block on the SS-IO. A variable (VAR) must be
created in the host controller to store the value of each input used. The variables that
represent the inputs are then referenced using row 7 and row 8 of the SMART-Sensor
worksheet. To permit the SS-IO to define the values of these variables, the User Edit
column must be configured for Can Change.
When the SS-IO inputs are configured for temperature, they have a maximum range of
-40 to 120 °C (-40 to 248 °F).
TRIAC 1 & 2
Input 1 & 2
* SSR 1 & 2
Input 1 & 2
SS-DUCT-IO
* SS-DUCT models use solid-state relays
(SSR) to switch AC or DC.
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