Allen-Bradley 1769-OF8C Bedienungsanleitung

Publication 1769-IN065B-EN-P - September 2005

Installation Instructions

Compact 1769-OF8C Analog Output Module

Inside

Module Description ..................................................................................2

Module Installation...................................................................................3

System Assembly......................................................................................4

Mounting Expansion I/O ...........................................................................5

Replacing a Single Module within a System ...........................................7

Module Spare/Replacement Parts ...........................................................8

Field Wiring Connections..........................................................................8

I/O Memory Mapping .............................................................................12

Specifications .........................................................................................23

Hazardous Location Considerations .......................................................26

Environnements dangereux ....................................................................27

For More Information..............................................................................28

2Compact 1769-OF8C Analog Output Module

Publication 1769-IN065B-EN-P - September 2005

Module Description

Item Description

1bus lever

(with locking function)

2a upper panel mounting tab

2b lower panel mounting tab

3module status LED

4module door with terminal

identification label

5a movable bus connector

with female pins

5b stationary bus connector

with male pins

6nameplate label

7a upper

tongue-and-groove slots

7b lower

tongue-and-groove slots

8a upper DIN rail latch

8b lower DIN rail latch

9write-on label (user ID tag)

10 removable terminal block (RTB)

with finger-safe cover

10a RTB upper retaining screw

10b RTB lower retaining screw

10a

10b 4

1769-OF8C

DANGER

Do Not Remove RTB Under Power

Unless Area is Non-Hazardous

Ensure Adjacent

Bus Lever is Unlatched/Latched

Before/After

Removing/Inserting Module

NEUT

I out 2 +

I out 3 +

I out 4 +

I out 5 +

I out 6 +

I out 7 +

+24V dc

I out 1 +

I out 0 +

ANGL

Com

ANLG

Com

ANLG

Com

ANLG

Com

ANLG

Com

ANLG

Com

ANLG

Com

ANLG

Com

Analog

Compact 1769-OF8C Analog Output Module 3

Publication 1769-IN065B-EN-P - September 2005

Module Installation

Compact 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)

Prevent Electrostatic Discharge

Remove Power

(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.

ATTENTION Electrostatic discharge can damage integrated circuits or

semiconductors if you touch bus connector pins or the terminal

block. 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 inserting this module. When

you remove or insert 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

Electrical arcing causes excessive wear to contacts on both the

module and its mating connector. Worn contacts may create

electrical resistance.

4Compact 1769-OF8C Analog Output Module

Publication 1769-IN065B-EN-P - September 2005

System Assembly

The module can be attached to the controller or an adjacent I/O module before or

after mounting. For mounting instructions, see “Panel Mounting” on page 6, or

“DIN Rail Mounting” on page 7. To work with a system that is already mounted, see

“Replacing a Single Module within a System” on page 7.

The following procedure shows you how to assemble the Compact I/O system.

1. Disconnect power.

2. Check that the bus lever of the module to be installed is in the unlocked

(fully right) position.

3. Use the upper and lower tongue-and-groove slots (1) to secure the modules

together (or to a controller).

4. Move the module back along the tongue-and-groove slots until the bus

connectors (2) line up with each other.

5. Push the bus lever back slightly to clear the positioning tab (3). Use your

fingers or a small screwdriver.

Compact 1769-OF8C Analog Output Module 5

Publication 1769-IN065B-EN-P - September 2005

6. To allow communication between the controller and module, move the bus

lever fully to the left (4) until it clicks. Ensure it is locked firmly in place.

7. Attach an end cap terminator (5) to the last module in the system by using

the tongue-and-groove slots as before.

8. Lock the end cap bus terminator (6).

Mounting Expansion I/O

Minimum Spacing

Maintain spacing from

enclosure walls,

wireways, adjacent

equipment, etc. Allow 50

mm (2 in.) of space on all

sides for adequate

ventilation, as shown:

ATTENTION When attaching I/O modules, it is very important that the bus

connectors are securely locked together to ensure proper

electrical connection.

IMPORTANT A 1769-ECR or 1769-ECL right or left end cap must be used to

terminate the end of the serial communication bus.

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 on

power up.

Top

Bottom

Side Side

Host Controller

Compact I/O

End Cap

6Compact 1769-OF8C Analog Output Module

Publication 1769-IN065B-EN-P - September 2005

Panel Mounting

Mount the module to a panel using two screws per module. Use M4 or #8 panhead

screws. Mounting screws are required on every module.

Panel Mounting Using the Dimensional Template

Panel Mounting Procedure Using Modules as a Template

The following procedure allows you to use the assembled modules as a template

for drilling holes in the panel. If you have sophisticated panel mounting equipment,

you can use the dimensional template provided on page 6. Due to module

mounting hole tolerance, it is important to follow these procedures:

1. On a clean work surface, assemble no more than three modules.

2. Using the assembled modules as a template, carefully mark the center of all

module-mounting holes on the panel.

3. Return the assembled modules to the clean work surface, including any

previously mounted modules.

4. Drill and tap the mounting holes for the recommended M4 or #8 screw.

5. Place the modules back on the panel, and check for proper hole alignment.

6. Attach the modules to the panel using the mounting screws.

7. Repeat steps 1 to 6 for any remaining modules.

TIP If mounting more modules, mount only the last one of this

group and put the others aside. This reduces remounting time

during drilling and tapping of the next group.

Host Controller

Compact I/O

End Cap

132 (5.197)

122.6±0.2

(4.826±0.008)

(1.38)

28.5

(1.12)

Refer to host controller documentation for this dimension.

For more than 2 modules: (number of modules-1) X 35mm (1.38 in.)

NOTE: All dimensions are in mm (inches).

Hole spacing tolerance: ±0.4 mm (0.016 in.)

Compact 1769-OF8C Analog Output Module 7

Publication 1769-IN065B-EN-P - September 2005

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 latches. Press the DIN

rail mounting area of the module against the DIN rail. The latches will momentarily

open and lock into place.

Replacing a Single Module within a System

The module can be replaced while the system is mounted to a panel (or DIN rail).

Follow the steps below in order:

1. Remove power. See important note on page 3.

2. On the module to be removed, remove the upper and lower mounting

screws from the module (or open the DIN latches using a flat-blade or

phillips-style screwdriver).

3. Move the bus lever to the right to disconnect (unlock) the bus.

4. On the right-side adjacent module, move its bus lever to the right (unlock)

to disconnect it from the module to be removed.

5. Gently slide the disconnected module forward. If you feel excessive

resistance, check that the module has been disconnected from the bus, and

that both mounting screws have been removed (or DIN latches opened).

6. Before installing the replacement module, be sure that the bus lever on the

module to be installed, and on the right-side adjacent module are in the

unlocked (fully right) position.

7. Slide the replacement module into the open slot.

8. Connect the modules together by locking (fully left) the bus levers on the

replacement module and the right-side adjacent module.

9. Replace the mounting screws (or snap the module onto the DIN rail).

TIP It may be necessary to rock the module slightly from front to

back to remove it, or, in a panel-mounted system, to loosen

the screws of adjacent modules.

8Compact 1769-OF8C Analog Output Module

Publication 1769-IN065B-EN-P - September 2005

Module Spare/Replacement Parts

•Terminal block, catalog number 1769-RTBN12 (1 per kit)

(A-B part number A22112-319-01)

•Door, catalog number 1769-RD (2 per kit)

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.

System Wiring Guidelines

Consider the following when wiring your system:

•All module commons (ANLG COM) are connected in the analog module.

The analog common (ANLG COM) is not connected to earth ground inside

the module.

•Channels are not isolated from each other.

•Use Belden 8761, or equivalent, shielded wire.

•Under normal conditions, the drain wire and shield junction must be

connected to earth ground, via a panel or DIN rail mounting screw at the

analog I/O module end. Keep the shield connection to ground as short as

possible.(1)

•To ensure optimum accuracy, limit overall cable impedance by keeping your

cable as short as possible. Locate the I/O system as close to your sensors or

actuators as your application will permit.

•Current outputs (Iout 0+ to Iout 7+) of the 1769-OF8C module source

current that returns to ANLG COM. Load resistance for a current output

channel must remain between 0 and 500 Ω.

(1) In environments where high frequency noise may be present, it may be necessary to ground the shield via a 0.1µF capacitor

at the load end and also ground the module end without a capacitor.

Compact 1769-OF8C Analog Output Module 9

Publication 1769-IN065B-EN-P - September 2005

External Power Switch

The 1769-OF8C has an external 24V dc power switch which gives you the option of

using an external power supply. The switch is located in on the lower left portion

of the module’s circuit board, as shown below. With this switch pressed on the top

(default), 24V dc power is drawn from the 1769 system power supply via the 1769

I/O bus. Pressed on the bottom, 24V dc power is drawn from the external power

supply.

Wire the external power supply to the module via the module’s terminal block. The

external power supply must be rated Class 2, with a 24V dc range of 20.4 to 26.4V

dc and 160 mA minimum.

BUS EXT

External Power Switch

Pressed on the Top

Bus Power (default)

Pressed on the Bottom

External Power

10 Compact 1769-OF8C Analog Output Module

Publication 1769-IN065B-EN-P - September 2005

Wiring Output Devices

Basic wiring of output devices is shown below.

Labeling the Terminals

A removable, write-on label is provided with the module. Remove the label from

the door, mark the identification of each terminal with permanent ink, and slide the

label back into the door. Your markings (ID tag) will be visible when the module

door is closed.

ATTENTION •Miswiring of the module to an AC/DC source will damage the

module.

•Be careful when stripping wires. Wire fragments that fall into

a module could cause damage at power up. Once wiring is

complete, ensure the module is free of all metal fragments.

ANLG Com

dc NEUT

+24V dc

I out 7+

I out 6+

I out 5+

I out 4+

I out 3+

I out 2+

I out 1+

I out 0+

Current Load

earth ground

External 24V dc Power

Supply (optional)

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