Electrostatic discharge can damage controller components. Use proper electrostatic discharge
precautions during installation, setup, and servicing to avoid damaging the controller.
For detailed information on configuring and wiring an MS/TP Bus, FC bus, and SA bus, refer to
the
FX-PC Series Controllers MS/TP Communications Bus Technical Bulletin (LIT-12011670)
or
MS/TP
Communications Bus for BCPro System Technical Bulletin (LIT-12011908)
.
Terminal blocks and bus ports
See Figure 3 for terminal block and bus port locations on the controller. Observe the following
guidelines when wiring a controller.
Input and Output terminal blocks
All of the input terminal blocks are mounted on the bottom of the controller and the output
terminal blocks are mounted on the top of the controller. See Table 3 for more information about I/
O terminal functions, requirements, and ratings.
SA/FC bus terminal block
An FX-PCX can be connected to a Sensor/Actuator (SA) bus or a Field Controller (FC) bus, but not to
both buses simultaneously. The SA/FC bus terminal block is a removable, 4-terminal plug that fits
into a board-mounted jack.
When connecting the FX-PCX to an FC bus, wire the bus terminal block plugs on the controller and
the other controllers in a daisy-chain configuration using 3-wire twisted, shielded cable as shown in
the FC Bus Terminal Block wiring figure below. See Table 5 for more information.
Figure 4: FC bus terminal block wiring
When connecting the FX-PCX to an SA bus, wire the bus terminal block plugs on the controller and
other SA bus devices in a daisy-chain configuration using 4-wire twisted, shielded cable as shown in
Input and Output wiring guidelines
for more information.
7
FX-PCX17 and FX-PCX27 Expansion Input/Output Module Installation Instructions
