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Table 2 for more information about I/O terminal
functions, requirements, and ratings.
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 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 4 for
more information.
Figure 4: FC bus terminal block wiring
When connecting the IOM 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 Figure 5.
See
Input and Output wiring guidelines
information.
Figure 5: SA bus terminal block wiring
6
IOM1711 and IOM2711 Input/Output Module Installation Guide
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 (FAC, FEC, or
VMA) 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 controller
is an RJ-12, 6-position modular jack that provides
a connection for devices on the SA bus, a Wireless
Commissioning Converter, a ZFR/ZFR Pro Wireless
Router (depending on which bus 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 the Pin Number Assignments figure below.
Figure 6: Pin number assignments for sensor, SA
bus and FC bus ports on controllers
for more
Supply power terminal block
The 24 VAC supply power terminal block is a gray,
removable, 3-terminal plug that fits into a board-
mounted jack on the top right of the controller.
Note: If CE compliance is required for the MS-
IOM1711-0 or MS-IOM2711-2 product and
application, the ferrite ring that is included in
the package must be used in the installation.
Use of the ferrite ring ensurescompliance to
the EMC Directive in all possible applications.
The ferrite ring does not affect UL864 Smoke
Control applications. It is not required for
applications in North America.
To install the ferrite ring, pass the two 24 VAC
supply powerwires through the opening of the
ring and then complete five wraps or turns of
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