Johnson Controls MS-IOU4710-0U Installation Instructions Manual page 6

Figure 7: 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 8. The middle terminal on the supply
power terminal block is not used. See
information about the supply terminal block.
IOU4710 Input/Output Module Installation Instructions
Figure 8: 24 VAC Supply Power Terminal Block Wiring
Important: Connect 24 VAC supply power to the
Table 4 for more
Wireless Network Applications
Important: Wireless operation is not approved for
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.
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