Johnson Controls IOM3721 Installation Manual

Application
The IOM3721 input/output expansion module is
a part of the Metasys
®
Controller family. Input/Output expansion modules
(IOMs) expand the number of input/output points
connected to a Network Automation Engine (NAE),
Network Control Engine (NCE), Advanced Application
Field Equipment Controller (FAC), Field Equipment
Controller (FEC), or Variable Air Volume Modular
Assembly (VMA) to monitor and control a wide
variety of HVAC equipment.
IOM expansion modules operate on an RS-485
BACnet MS/TP Bus and integrate into Johnson
®
Controls and third-party BACnet systems. IOMs
®
Note: With Release 10.1 of the Controller
Configuration Tool (CCT), VMAs, FECs, and
FACs can be configured to communicate using
either the BACnet MS/TP or the N2 field bus
networking protocol. The operation of the
IOM is not affected by the selection of the
BACnet MS/TP or the N2 protocol in the host
controller, when the IOM is connected to the
host controller using the SA bus.
North American emissions
compliance
United States
This equipment has been tested and found to
comply with the limits for a Class A digital device
pursuant to Part 15 of the FCC Rules. These limits
are designed to provide reasonable protection
against harmful interference when this equipment
is operated in a commercial environment. This
equipment generates, uses, and can radiate radio
frequency energy and, if not installed and used in
accordance with the instruction manual, may cause
harmful interference to radio communications.
Operation of this equipment in a residential area
may cause harmful interference, in which case the
users will be required to correct the interference at
their own expense.
IOM3721 Expansion Input/Output Module
system Field Equipment
Installation Guide
Canada
This Class (A) digital apparatus meets all the
requirements of the Canadian Interference-Causing
Equipment Regulations.
Cet appareil numérique de la Classe (A) respecte
toutes les exigences du Règlement sur le matériel
brouilleur du Canada.
Installation
Observe the following guidelines when installing an
expansion module:
• To minimize vibration and shock damage,
transport the expansion module in the original
container.
• Verify that all parts shipped with the expansion
module.
• Do not drop the expansion module or subject it to
physical shock.
Parts included
• One expansion module with removable terminal
blocks (Power and SA/FC bus are removable)
• One installation instructions sheet
Materials and special tools needed
• Three fasteners appropriate for the mounting
surface (M4 screws or #8 screws)
• One 20 cm (8 in.) or longer piece of 35 mm DIN
rail and appropriate hardware for DIN rail mount
• Small straight-blade screwdriver for securing
wires in the terminal blocks
Physical features
The following figure displays the physical features
of an IOM, and the accompanying table provides a
description of the physical features and a reference
to further information where required.
Part No. 24-10144-130 Rev. K
2019-10-18
*2410144130K*
(barcode for factory use only)
MS-IOM3721