Physical Features - Johnson Controls IOM3731-0A Installation Manual

Physical features

The following figure displays the physical features
of the IOM, and the accompanying table provides a
Figure 1: IOM3731-0A physical features
Table 1: IOM3731-0A feature callouts and
descriptions
Callo
Physical feature: description and references
ut
1 Binary Outputs (BOs) Terminal Block (see Table 2)
2 Mounting Clip (see Figure 1)
3 Device Address DIP Switch Block (see )
4 24 VAC, Class 2 Supply Power Terminal Block (see )
Cover Lift Tab (see Removing the expansion module
5
cover)
Sensor Actuator (SA) Bus/Field Controller (FC) Bus
6
Terminal Block (see )
7 Binary Inputs (BIs) Terminal Block (see Table 2)
8 LED Status Indicators (see Troubleshooting)
Sensor Actuator (SA) Bus or Field Controller (FC) Bus Port
9
(RJ-12 6-pin Modular Jack) (see
Mounting
Observe the following guidelines when mounting an
expansion module:
• Ensure the mounting surface can support the
expansion module, DIN rail, and any user-
supplied enclosure.
• Mount the expansion module horizontally on 35
mm (1.4 in.) DIN rail whenever possible.
2 IOM3731-0A Expansion Input/Output Installation Guide
SA/FC bus port)
description of the physical features and a reference
to further information where required.
• Mount the expansion module in the proper
mounting position (Figure 2).
• Mount the expansion module on a hard, even
surface whenever possible in wall-mount
applications.
• Use shims or washers to mount the expansion
module securely and evenly on the mounting
surface.
• Mount the expansion module in an area free
of corrosive vapors and observe the Ambient
Conditions requirements in Table .
• Provide for sufficient space around the expansion
module for cable and wire connections for easy
cover removal and good ventilation through
the expansion module (50 mm [2 in.] minimum
on the top, bottom, and front of the expansion
module).
• Do not mount the expansion module on surfaces
prone to vibration, such as duct work.
• Do not mount the expansion module in areas
where electromagnetic emissions from other
devices or wiring can interfere with expansion
module communication.