User Manual

I/O T ermination Assembly
4 Industrial Control Services
The unused pins of the connector are tracked to a screw terminal on
the PCB to allow the field cables and hoods to be grounded if required.
Module Operation
As shown below, pre - formed polarised I/O cables are connected
between the I/O backplanes and ITA connectors
J1/J2/J3/J4/J6/J7/J8/J9. Field cables are connected to J5 and
common feed/returns and spare pin grounds are applied to connector
J10 (screw terminals). With a Screw Terminal ITA, connector J5
would consist of a set of dual row screw terminals.
Pins 1 to 8 of the I/O Chassis 8 - way connectors are wired one - to - one
with pins 1 to 8 of the 8 - way connectors on the ITA. Each connector
on the ITA has pin identification shown on the l egend of the ITA.
Cross - mapping between the 8 - way connectors on the ITA and the
Varelco/Screw terminals is shown in the appendices. Where field
sensor power is provided on single ended ITAs, the tables in the
appendices show the field power connections and distribution.