User`s manual

NPort S8000 Series Getting Started
2-6
SW 1 2 3 4 3&4
Pull High Pull Low Terminator Terminator Terminator
ON 1 KΩ 1 KΩ 120 Ω 100 Ω 55 Ω
Default OFF 150 KΩ 150 KΩ – – –
ATTENTION
Do
not set the resistors to 1 KΩ. When using RS-232. Doing so will degrade the RS-232 signals
and reduce the
effecti
ve communication distance.
Wiring the Relay Contact
The NPort 8455I-MM-SChas two sets of relay output—relay 1 and relay 2. Each relay contact consists of two
contacts of the terminal block on the NPort 8455I-MM-SC’s top panel. Refer to the next section for detailed
instructions on how to connect the wires to the terminal block connector, and how to attach the terminal block
connector to the terminal block receptor. The meaning of the two contacts used to connect the relay contacts
is illustrated below.
The fault circuit will open if
1. A relay warning event is triggered,
OR
2. The S8000 is the Master of this Turbo Ring,
and the Turbo Ring
is broken,
OR
3. Start-up failure.
If none of these three conditions
is met, the fault circuit will
remain
closed.
Wiring the Digital Inputs
The NPort 8455I-MM-SC unit has two sets of digital inputs, DI 1 and DI 2. Each DI consists of two contacts of
the 6-pin terminal block connector on the NPort 8455I-MM-SC’s top panel. The remaining contacts are used for
the NPort 8455I-MM-SC’s two DC inputs. Top and front views of one of the terminal block connectors are shown
below.