Physical features
The following figure displays the physical features
of the IOM, and the accompanying table provides a
description of the physical features and a reference
to further information where required.
Figure 1: IOM3731-0A physical features
Table 1: IOM3731-0A feature callouts and
descriptions
Callo
ut
Physical feature: description and references
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 )
5
)
6
Sensor Actuator (SA) Bus/Field Controller (FC) Bus
Terminal Block (see )
7
Binary Inputs (BIs) Terminal Block (see Table 2)
8
)
9
Sensor Actuator (SA) Bus or Field Controller (FC) Bus Port
(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.
• 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.
IOM3731-0A Expansion Input/Output Installation Guide
2