5.5 STCIS#A Simplex Contact Input
The Simplex Contact Input (STCI) terminal board is a compact contact input terminal board designed for DIN-rail or flat
mounting. The STCI board accepts 24 contact inputs that are supplied with a nominal 24/48 V dc excitation from an external
source. The contact inputs have noise suppression to protect against surge and high-frequency noise. The I/O pack plugs into
the D-type connector and communicates with the controller over Ethernet.
STCI Compatibility
Terminal Board Wetting Voltage
Euro Style Box-type
Terminals Blocks
Safety Rated
STCIS2A 24 V dc
Pluggable
IEC 61508 safety certified when used
with YDIA I/O pack
STCIS4A 48 V dc
5.5.1 Installation
The STCI plus a plastic insulator mounts on a sheet metal carrier that then mounts on a DIN-rail. Optionally, the STCI plus
insulator mounts on a sheet metal assembly that then bolts in a cabinet. The contact inputs are wired directly to the terminal
block, typically using #18 AWG wires. Shields should be terminated on a separate bracket. 52 terminals inputs are available.
Note E1 and E2 are chassis grounding screws for SCOM.
Caution
Do not replace a STCIH2A with STCIH8A unless you have ControlST V04.05 or
higher installed.
YDIA Discrete Input Modules GEH-6855_Vol_II System Guide 127
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