CAUTION
Risk of Property Damage:
Do not apply power to the system before checking
all wiring connections. Short circuited or improperly
connected wires may result in permanent damage to
the equipment.
ATTENTION
Mise En Garde: Risque de dégâts matériels:
Ne pas mettre le système sous tension avant
d'avoir vérifié tous les raccords de câblage. Des
fils formant un court-circuit ou connectés de façon
incorrecte risquent d'endommager irrémédiablement
l'équipement.
Important:
Do not exceed the expansion module
electrical ratings. Exceeding expansion module
electrical ratings can result in permanent damage to
the expansion modules and void any warranty.
Important:
Use copper conductors only. Make
all wiring in accordance with local, national, and
regional regulations.
Important:
Electrostatic discharge can damage
expansion module components. Use proper
electrostatic discharge precautions during
installation, setup, and servicing to avoid damaging
the expansion module.
For detailed information on configuring and wiring
an MS/TP bus, FC bus, and SA bus, refer to the
MS/TP
Communications Bus Technical Bulletin (LIT-12011034)
.
Terminal blocks and bus ports
See
for terminal block and bus port
locations on the expansion module. Observe the following
guidelines when wiring an expansion module.
Input and output terminal blocks
The input terminal blocks are mounted on the bottom of
the expansion module and the output terminal blocks are
mounted on the top of the expansion module.
SA/FC bus terminal block
An IOM 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 IOM to an FC bus, wire the bus
terminal block plugs on the expansion module, and the
other controllers and expansion modules in a daisy-chain
configuration using 3-wire twisted, shielded cable as
shown in Figure 4.
Figure 4: FC bus terminal block wiring
When connecting the IOM to an SA bus, wire the bus
terminal block plugs on the expansion module and other
SA bus devices in a daisy-chain configuration using 4-wire
twisted, shielded cable as shown in Figure 5.
Figure 5: SA bus terminal block wiring
Note:
The SA PWR/SHLD terminal does not supply 15
VDC. The SA PWR/SHLD terminal is isolated and can
be used to connect (daisy chain) the 15 VDC power
leads on the SA bus (Figure 5) or the cable shields on
the FC bus (Figure 4). The SA bus supervisor supplies
15 VDC to devices on the SA bus requiring power.
SA/FC bus port
The SA/FC bus port on the front of the expansion
module is an RJ-12, 6-position modular jack that provides
a connection for devices on the SA bus, a Wireless
Commissioning Converter, or ZFR/ZFR Pro Wireless
Router (depending on which wireless system the IOM is
operating on).
The SA/FC bus port is connected internally to the SA/FC
bus terminal block. See Table 4 for more information. The
SA/FC bus Port pin assignment is shown in Figure 6.
IOM2721 Input/Output Module Installation Guide
4