Allen-Bradley MicroLogix 1200 User manual

Publication 1762-IN016A-EN-P - July 2003
Installation Instructions
MicroLogix™ 1200 Analog Output Module
(Catalog Number 1762-OF4)
Inside…
For More Information................................................................................2
Description................................................................................................3
Installation ................................................................................................3
Mounting...................................................................................................5
System Assembly......................................................................................7
Field Wiring Connections..........................................................................7
Output Type Selection...............................................................................8
Wiring .......................................................................................................8
I/O Memory Mapping .............................................................................11
Specifications .........................................................................................16
Hazardous Location Considerations .......................................................18
Environnements dangereux ....................................................................19
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2MicroLogix™ 1200 Analog Output Module
Publication 1762-IN016A-EN-P - July 2003
For More Information
If you would like a manual, you can:
•download a free electronic version from the internet:
www.ab.com/micrologix or www.theautomationbookstore.com
•purchase a printed manual by:
–contacting your local distributor or Rockwell Automation representative
–visiting www.theautomationbookstore.com and placing your order
–calling 1.800.963.9548 (USA/Canada)
or 001.330.725.1574 (Outside USA/Canada)
For Refer to this Document Pub. No.
Information on installing, wiring, and operating a
MicroLogix 1200 Programmable Controller
MicroLogix 1200 Programmable
Controllers User Manual
1762-UM001
Installation guide for the MicroLogix 1200
Programmable Controller.
MicroLogix 1200 Programmable
Controllers Installation Instructions
1762-IN006
Installation guide for the MicroLogix 1200 Memory
Module and Real Time clock.
MicroLogix 1200 Memory Module and/or
Real Time Clock Installation Instructions
1762-IN001
More information on proper wiring and grounding
techniques.
Industrial Automation Wiring and
Grounding Guidelines
1770-4.1

MicroLogix™ 1200 Analog Output Module 3
Publication 1762-IN016A-EN-P - July 2003
Description
Installation
1762 I/O is suitable for use in an industrial environment when installed in accordance with
these instructions. Specifically, this equipment is intended for use in clean, dry environments
(Pollution degree 2(1)) and to circuits not exceeding Over Voltage Category II(2) (IEC
60664-1).(3)
Item Description Item Description
1a upper panel mounting tab 5 bus connector cover
1b lower panel mounting tab 6 flat ribbon cable with bus connector (female)
2 power diagnostic LED 7 terminal block
3 module door with terminal identification label 8 DIN rail latch
4 bus connector
with male pins
9 pull loop
(1) Pollution Degree 2 is an environment where, normally, only non-conductive pollution occurs except that occasionally a
temporary conductivity caused by condensation shall be expected.
(2) Over Voltage Category II is the load level section of the electrical distribution system. At this level transient voltages are
controlled and do not exceed the impulse voltage capability of the product’s insulation.
(3) Pollution Degree 2 and Over Voltage Category II are International Electrotechnical Commission (IEC) designations.
1a
1b
5
2
3
9
4
6
7
1a
1b
2
6
8
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4MicroLogix™ 1200 Analog Output Module
Publication 1762-IN016A-EN-P - July 2003
Prevent Electrostatic Discharge
Remove Power
ATTENTION
!
Electrostatic discharge can damage integrated circuits or
semiconductors if you touch bus connector pins. Follow these
guidelines when you handle the module:
•Touch a grounded object to discharge static potential.
•Wear an approved wrist-strap grounding device.
•Do not touch the bus connector or connector pins.
•Do not touch circuit components inside the module.
•If available, use a static-safe work station.
•When not in use, keep the module in its static-shield box.
ATTENTION
!
Remove power before removing or installing this module. When you
remove or install a module with power applied, an electrical arc may
occur. An electrical arc can cause personal injury or property damage
by:
•sending an erroneous signal to your system’s field devices, causing
unintended machine motion
•causing an explosion in a hazardous environment
•causing permanent damage to the module’s circuitry
Electrical arcing causes excessive wear to contacts on both the module
and its mating connector. Worn contacts may create electrical
resistance.

MicroLogix™ 1200 Analog Output Module 5
Publication 1762-IN016A-EN-P - July 2003
Mounting
Minimum Spacing
Maintain spacing from enclosure
walls, wireways, adjacent
equipment, etc. Allow 50.8 mm
(2 in.) of space on all sides for
adequate ventilation, as shown:
.
DIN Rail Mounting
The module can be mounted using the following DIN rails: 35 x 7.5 mm
(EN 50 022 - 35 x 7.5) or 35 x 15 mm (EN 50 022 - 35 x 15).
Before mounting the module on a DIN rail, close the DIN rail latch. Press the DIN rail
mounting area of the module against the DIN rail. The latch will momentarily open and lock
into place.
ATTENTION
!
Do not remove protective debris strip until after the module and all
other equipment near the module is mounted and wiring is complete.
Once wiring is complete and the module is free of debris, carefully
remove protective debris strip. Failure to remove strip before operating
can cause overheating.
TIP 1762 expansion I/O may be mounted horizontally only.
ATTENTION
!
During panel or DIN rail mounting of all devices, be sure that all
debris (metal chips, wire strands, etc.) is kept from falling into the
module. Debris that falls into the module could cause damage when
power is applied to the module.
Side Side
Top
Bottom
MicroLogix
1200
1762 I/O 1762 I/O 1762 I/O
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6MicroLogix™ 1200 Analog Output Module
Publication 1762-IN016A-EN-P - July 2003
Use DIN rail end anchors (Allen-Bradley part number 1492-EA35 or 1492-EAH35) for
environments with vibration or shock concerns.
Panel Mounting
Use the dimensional template shown below to mount the module. The preferred mounting
method is to use two M4 or #8 panhead screws per module. M3.5 or #6 panhead screws may
also be used, but a washer may be needed to ensure a good ground contact. Mounting screws
are required on every module.
TIP For environments with extreme vibration and shock concerns, use
the panel mounting method described below, instead of DIN rail
mounting.
End Anchor
End Anchor
90
(3.54)
100
(3.94)
40.4
(1.59)
40.4
(1.59)
14.5
(0.57)
For more than 2 modules: (number of modules - 1) x 40.4 mm (1.59 in.)
NOTE:
Hole spacing tolerance:
±0.4 mm (0.016 in.).
MicroLogix 1200
Expansion I/O
MicroLogix 1200
Expansion I/O
MicroLogix 1200
Expansion I/O
MicroLogix 1200

MicroLogix™ 1200 Analog Output Module 7
Publication 1762-IN016A-EN-P - July 2003
System Assembly
The expansion I/O module is attached to the controller or another I/O module by means of
a ribbon cable after mounting as shown below.
Field Wiring Connections
Grounding the Module
This product is intended to be mounted to a well-grounded mounting surface such as a metal
panel. Additional grounding connections from the module’s mounting tabs or DIN rail (if
used) are not required unless the mounting surface cannot be grounded. Refer to Industrial
Automation Wiring and Grounding Guidelines, Allen-Bradley publication 1770-4.1, for additional
information.
TIP Use the pull loop on the connector to disconnect modules. Do not
pull on the ribbon cable.
!
WARNING EXPLOSION HAZARD
•In Class I, Division 2 applications, the bus connector must be
fully seated and the bus connector cover must be snapped in
place.
•In Class I, Division 2 applications, all modules must be mounted
in direct contact with each other as shown on page 5. If DIN rail
mounting is used, an end stop must be installed ahead of the
controller and after the last 1762 I/O module.
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8MicroLogix™ 1200 Analog Output Module
Publication 1762-IN016A-EN-P - July 2003
Output Type Selection
The output type selection, current or voltage, is made by wiring to the appropriate terminals,
Iout or Vout, and by the type/range selection bits in the Configuration Data File (see
page 14).
Wiring
System Wiring Guidelines
Consider the following when wiring your system:
•The analog common (COM) is not connected to earth ground inside the module. All
terminals are electrically isolated from the system.
•Channels are not isolated from each other.
•Use Belden™ 8761, or equivalent, shielded wire.
•Under normal conditions, the drain wire (shield) should be connected to the metal
mounting panel (earth ground). Keep shield connection to earth ground as short as
possible.
•To ensure optimum accuracy for voltage type outputs, limit overall cable impedance
by keeping all analog cables as short as possible. Locate the I/O system as close to
your voltage type sensors or actuators as possible.
ATTENTION
!
Analog outputs may fluctuate for less than a second when power is
applied or removed. This characteristic is common to most analog
outputs. While the majority of loads will not recognize this short
signal, it is recommended that preventive measures be taken to
ensure that connected equipment is not affected.

MicroLogix™ 1200 Analog Output Module 9
Publication 1762-IN016A-EN-P - July 2003
Terminal Block Layout
Differential Sensor Transmitter Types
Labeling the Terminals
A write-on label is provided with the module. Mark the identification of each terminal with
permanent ink, and slide the label back into the door.
TIP Grounding the cable shield at the module end only usually provides
sufficient noise immunity. However, for best cable shield
performance, earth ground the shield at both ends, using a 0.01 µF
capacitor at one end to block AC power ground currents, if
necessary.
V out 3
V out 2
V out 1
V out 0
I out 3
I out 2
I out 1
I out 0
COM
COM
Commons connected
internally.
I out 0
I out 1
V out 2
V out 3
V out 0
V out 1
COM
I out 3
I out 2
COM
Current Load
Voltage Load
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10 MicroLogix™ 1200 Analog Output Module
Publication 1762-IN016A-EN-P - July 2003
Wiring the Finger-Safe Terminal Block
When wiring the terminal block, keep the finger-safe cover in place.
1. Route the wire under the terminal pressure plate. You can use the stripped end of the
wire or a spade lug. The terminals will accept a 6.35 mm (0.25 in.) spade lug.
2. Tighten the terminal screw making sure the pressure plate secures the wire.
Recommended torque when tightening terminal screws is 0.904 Nm (8 in-lbs).
3. After wiring is complete, remove the debris shield.
ATTENTION
!
Be careful when stripping wires. Wire fragments that fall into a
module could cause damage when power is applied. Once wiring is
complete, ensure the module is free of all metal fragments.
TIP If you need to remove the finger-safe cover, insert a screw driver
into one of the square wiring holes and gently pry the cover off. If
you wire the terminal block with the finger-safe cover removed, you
will not be able to put it back on the terminal block because the
wires will be in the way.