background image

Mount the controller on a hard, even surface
whenever possible in wall-mount applications.

Use shims or washers to mount the controller securely
and evenly on the mounting surface.

Mount the controller in an area free of corrosive
vapors and observe the Ambient Conditions
requirements in

Table 8

.

Provide for sufficient space around the controller for
cable and wire connections for easy cover removal
and good ventilation through the controller (50 mm
[2 in.] minimum on the top, bottom, and front of the
controller).

Do not mount the controller on surfaces prone to
vibration, such as duct work.

Do not mount the controller in areas where
electromagnetic emissions from other devices or
wiring can interfere with controller communication.

Observe these additional guidelines when mounting a
field controller in a panel or enclosure:

Mount the controller so that the enclosure walls do
not obstruct cover removal or ventilation through the
controller.

Mount the controller so that the power transformer
and other devices do not radiate excessive heat to
the controller.

Do not install the controller in an airtight enclosure.

Figure 1: Field Controller Mounting Positions

DIN Rail Mount Applications

Mounting the field controller horizontal on 35 mm DIN rail
is the preferred mounting method.

To mount a field controller on 35 mm DIN rail:

1. Securely mount a 20 cm (8 in.) or longer section of

35 mm DIN rail horizontal and centered in the desired
space so that the controller mounts in the horizontal
position shown in

Figure 1

.

2. Pull the two bottom mounting clips outward from the

controller to the extended position (

Figure 2

).

3. Hang the controller on the DIN rail by the hooks at

the top of the (DIN rail) channel on the back of the
controller (

Figure 2

), and position the controller snugly

against the DIN rail.

4. Push the bottom mounting clips inward (up) to secure

the controller on the DIN rail.

To remove the controller from the DIN rail, pull the
bottom mounting clips out to the extended position
and carefully lift the controller off the DIN rail.

Wall Mount Applications

To mount a field controller directly on a wall or other flat
vertical surface:

1. Pull the two bottom mounting clips outward and

ensure they are locked in the extended position as
shown in

Figure 2

.

2. Mark the mounting hole locations on the wall using

the dimensions in

Figure 2

and one of the mount

positions shown in

Figure 1

. Or hold the controller up

to the wall/surface in a proper mount position and
mark the hole locations through the mounting clips.

3. Drill holes in the wall/surface at the marked locations,

and insert appropriate wall anchors in the holes (if
necessary).

4. Hold the field controller in place, and insert the screws

through the mounting clips and into the holes (or
anchors). Carefully tighten all of the screws.

Important:

Do not overtighten the mounting screws.
Overtightening the screws may damage
the mounting clips.

Figure 2: Back of Controller Showing Extended

Mounting Clips, DIN Rail Channel, and Mounting

Dimensions, mm (in.)

2

IOM3721 Input/Output Module Installation Instructions

Summary of Contents for IOM3721

Page 1: ...ing Equipment Regulations Cet appareil numérique de la Classe A respecte toutes les exigences du Règlement sur le matériel brouilleur du Canada 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 i...

Page 2: ...sired space so that the controller mounts in the horizontal position shown in Figure 1 2 Pull the two bottom mounting clips outward from the controller to the extended position Figure 2 3 Hang the controller on the DIN rail by the hooks at the top of the DIN rail channel on the back of the controller Figure 2 and position the controller snugly against the DIN rail 4 Push the bottom mounting clips ...

Page 3: ...b See Removing the Controller Cover 3 Sensor Actuator SA Bus or Field Controller FC Bus Terminal Block See SA FC Bus Terminal Block 4 End of Line EOL Termination Switch See Setting the End of Line EOL Switch 5 Binary Input BI Terminal Block Dry Contact Maintained or Pulse Counter Accumulator Mode See Table 2 6 LED Status Indicators See Table 6 7 Sensor Actuator SA Bus or Field Controller FC Bus Po...

Page 4: ...T 12011034 IOM Terminal Blocks and Bus Ports See Figure 3 for terminal block and bus port locations on the controller Observe the following guidelines when wiring a controller Input and Output Terminal Blocks On most field controller models all of the input terminal blocks are mounted on the bottom of the controller and the output terminal blocks are mounted on the top of the controller See Table ...

Page 5: ... about the Supply Terminal Block Figure 7 24 VAC Supply Power Terminal Block Wiring Note The supply power wire colors may be different on transformers from other manufacturers Refer to the transformer manufacturer s instructions and the project installation drawings for wiring details Important Connect 24 VAC supply power to the field controller and all other network devices so that transformer ph...

Page 6: ...Inputs outputs with cables less than 30 m 100 ft typically do not require an offset in the software setup Cable runs over 30 m 100 ft may require an offset in the input output software setup Table 2 IOM3721 Terminal Blocks Functions Ratings Requirements and Cables Determine Wire Size and Maximum Cable Length 1 Function Ratings Requirements Terminal Label Terminal Block Label See Guideline A in Tab...

Page 7: ...ded copper 100 mV maximum voltage drop Depending on cable and the connected input or output device you may have to define an offset in the setup software for the input or output point 229 m 750 ft twisted wire 1 5 mm 2 18 AWG stranded copper B 137 m 450 ft twisted wire 0 8 mm 20 AWG stranded copper 91 m 300 ft twisted wire 0 6 mm 22 AWG stranded copper 61 m 200 ft twisted wire N A 24 AWG stranded ...

Page 8: ...irs shielded cable recommended Note On the SA Bus the and wire are one twisted pair and the COM and SA PWR are the second twisted pair of wires FC or SA Bus Communications FCBUS 2 or SABUS 2 Signal Reference Common for FC or SA Bus communications COM SHLD on FC Bus Isolated terminal optional shield drain connection SAP WR on SA Bus 15 VDC power lead connection Note The SA PWR terminal on an IOM co...

Page 9: ...l equals the intended address For example if the intended device address is 21 set switch 16 to ON first then set switch 4 ON followed by switch 1 16 4 1 21 3 Set switch 128 to ON only for controllers on a ZFR1800 Series Wireless Field Bus application For all hard wired SA and FC bus applications ensure that switch 128 is set to Off Note Do not connect a field controller with switch 128 set to ON ...

Page 10: ...ower two latches 3 Replace the cover by placing it squarely over the base and then gently and evenly push the cover on to the latches until they snap into the latched position Setting the End of Line EOL Switch Each field controller has an EOL switch which when set to ON sets the field controller as a terminating device on the bus See Figure 3 for the EOL switch location The default EOL switch pos...

Page 11: ... Information Description Product Code Number Wireless Commissioning Converter with Bluetooth Technology MS BTCVT 1 Wireless Field Bus Router for wireless Field Controller applications MS ZFR1811 0 Transformer 120 VAC Primary to 24 VAC secondary 20 VA Wall Plug TP 2420 Transformer 120 208 240 VAC Primary to 24 VAC Secondary 40 VA Foot Mount 8 in Primary Leads and Secondary Screw Terminals Class 2 N...

Page 12: ...Supply Power 4 Wire and 3 Wire Pluggable Screw Terminal Blocks SA FC Bus Port RJ 12 6 Pin Modular Jacks Terminations Horizontal on single 35 mm DIN rail mount preferred or screw mount on flat surface with three integral mounting clips on controller Mounting Enclosure material ABS and polycarbonate UL94 5VB Self extinguishing Plenum Rated Protection Class IP20 IEC529 Housing 150 x 164 x 53 mm 5 7 8...

Page 13: ...l not be liable for damages resulting from misapplication or misuse of its products Building Efficiency 507 E Michigan Street Milwaukee WI 53202 Metasys and Johnson Controls are registered trademarks of Johnson Controls Inc All other marks herein are the marks of their respective owners 2013 Johnson Controls Inc www johnsoncontrols com Published in U S A 13 IOM3721 Input Output Module Installation...

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