Supply Power Terminal Block; Wireless Network Applications - Johnson Controls IOM4711 Installation Instructions Manual

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
shields on the FC bus
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 controller is an
RJ-12, 6-position modular jack that provides a connection
for devices on the SA bus.
The SA/FC bus port is connected internally to the SA/FC
bus terminal block. See
The SA/FC bus port pin assignment is shown in
6.
Figure 6: Pin Number Assignments for Sensor, SA
Bus and FC Bus Ports on Controllers

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.
Wire the 24 VAC supply power wires from the transformer
to the HOT and COM terminals on the terminal plug as
shown in Figure 7. The middle terminal on the supply
power terminal block is not used. See
information about the supply terminal block.
IOM4711 Input/Output Module Installation Instructions
(Figure 5) or the cable
(Figure 4).
Table 5 for more information.
Table 5 for more
Figure 7: 24 VAC Supply Power Terminal Block Wiring
Figure
Important: Connect 24 VAC supply power to the
controller and all other network devices so
that transformer phasing is uniform across
the network devices. Powering network
devices with uniform 24 VAC supply power
phasing reduces noise, interference, and
ground loop problems. The controller does
not require an earth ground connection.

Wireless Network Applications

Important: Wireless operation is not approved for
smoke control applications. Refer to the
Metasys® System UL 864 10th Edition
UUKL/ORD-C100-13 UUKLC Smoke
Control System Technical Bulletin
(LIT-12012487) for detailed requirements
and procedures for installing,
commissioning, and operating UL 864
UUKL/UUKLC Listed Metasys system
devices.
6