OPERATION
FIELD I/O
The 7I76 has a 32 input, 16 output isolated field I/O system to support a wide range
of input and output devices. The isolated I/O is intended for low voltage DC control
systems (commonly 24VDC). Inputs are sinking type. That is they sense positive input
voltages relative to field ground. Outputs are sourcing (7I76) or sinking (7I76D) type.
Sourcing outputs supply field power to field ground referred loads. Sinking outputs ground
field voltage referred loads when on.