Allen-Bradley 1756-IH16I, 1756-OB16D, 1756-OA8D, 1756-IN16, 1756-IC16 Installation Instructions Manual

Installation Instructions

ControlLogix
DC (19.2-30V) Diagnostic Output Module

(Catalog Number 1756-OB16D)

To: See page:

Obtain a User Manual 1

Identify the Module Components 2

Prevent Electrostatic Discharge 3

See Removal and Insertion Under Power (RIUP) 3

Understand Compliance to European Union Directive 4

Note the Power Requirements 5

Install the Module 5

Key the Removable Terminal Block/Interface Module 6

Wire the Module 7

Assemble the Removable Terminal Block and the Housing 8

Install the Removable Terminal Block onto the Module 8

Check the Indicators 10

Remove the Removable Terminal Block from the Module 11

Remove the Module 12

See 1756-OB16D Specifications 12

Hazardous Location information 14

Obtain a User Manual

This product also has a user manual (pub. no. 1756-6.5.8). To view it,
visit www.ab.com/manuals
You can also purchase a printed manual by:

• contacting your local distributor or Rockwell Automation

representative

or www.theautomationbookstore.com

• visiting www.theautomationbookstore.com and placing

an order

Publication 1756-IN058D-EN-P - October 2000

2 ControlLogix DC (19.2-30V) Diagnostic Output Module

• calling 800.963.9548 (USA/Canada) or 001.320.725.1574

(outside USA/Canada)

Identify the Module Components

You received the following components with your order:

• 1756-OB16D module

• Removable Terminal Block (RTB) door label

If you did not receive these components, contact your Rockwell
Automation sales office.

This module mounts in a ControlLogix chassis and uses a

separately-ordered RTB or a Bulletin 1492 Interface Module (IFM) to
connect all field-side wiring.

This module uses one of the following RTBs:

• 1756-TBCH 36 position Cage clamp RTB

• 1756-TBS6H 36 position Spring clamp RTB

Use an extended-depth cover (1756-TBE) for applications with heavy
gauge wiring or requiring additional routing space. When using an
IFM, consult the documentation that came with it to connect
all wiring.

IMPORTANT

Before you install your module, you should
have already:

• installed and grounded a 1756 chassis and

power supply.

• ordered and received an RTB or IFM and its

components for your application.

Publication 1756-IN058D-EN-P - October 2000

ControlLogix DC (19.2-30V) Diagnostic Output Module 3

Prevent Electrostatic Discharge

Electrostatic discharge can damage integrated circuits or

ATTENTION

semiconductors if you touch backplane 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 backplane 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.

Removal and Insertion Under Power (RIUP)

This module is designed so you can remove and insert it

WARNING

!

under backplane power and field-side power. When you
remove or insert a module while field-side power is
applied, you may cause an electrical arc. An electrical
arc can cause personal injury or property damage
because it may:

• send an erroneous signal to your system’s field

devices, causing unintended machine motion or loss
of process control.

• cause an explosion in a hazardous environment.

Repeated electrical arcing causes excessive wear to
contacts on both the module and its mating connector.
Worn contacts may create electrical resistance.

When you insert or remove the module while backplane
power is on, or you connect or disconnect the RTB with
field-side power applied, an electrical arc can occur. This
could cause an explosion in hazardous location
installations. Be sure that power is removed or the area is
non-hazardous before proceeding.

Publication 1756-IN058D-EN-P - October 2000

4 ControlLogix DC (19.2-30V) Diagnostic Output Module

Understand Compliance to European Union Directive

If this product bears the CE marking, it is approved for installation
within the European Union and EEA regions. It has been designed
and tested to meet the following directives.

EMC Directive

This product is tested to meet Council Directive 89/336/EEC
Electromagnetic Compatibility (EMC) and the following standards, in
whole or in part, documented in a technical construction file:

• EN 50081-2 EMC - Generic Emission Standard, Part 2 -

Industrial Environment

• EN 50082-2 EMC - Generic Immunity Standard, Part 2 -

Industrial Environment

This product is intended for use in an industrial environment.

Low Voltage Directive

This product is tested to meet Council Directive 73/23/EEC Low
Voltage, by applying the safety requirements of EN 61131-2
Programmable Controllers, Part 2 - Equipment Requirements and
Tests.

For specific information required by EN 61131-2, see the appropriate
sections in this publication, as well as the following Allen-Bradley
publications:

• Industrial Automation Wiring and Grounding Guidelines,

publication 1770-4.1

• Automation Systems Catalog, publication B111

This equipment is classified as open equipment and must be installed
(mounted) in an enclosure during operation as a means of providing
safety protection.

Publication 1756-IN058D-EN-P - October 2000

ControlLogix DC (19.2-30V) Diagnostic Output Module 5

Note the Power Requirements

This module receives power from the 1756 chasis power supply and
requires 2 sources of power from the backplane:

• 250mA at 5.1V dc

• 140mA at 24V dc

Add this current/power value (4.64W) to the requirements of all other
modules in the chassis to prevent overloading the power supply.

Install the Module

You can install or remove the module while chassis power is applied.

ATTENTION

Insertion Under Power (RIUP). However, when
you remove or insert an RTB with field-side power
applied, unintended machine motion or loss of

The module is designed to support Removal and

!

process control can occur. Exercise extreme
caution when using this feature.

1. Align circuit board with top and

bottom chassis guides.

2. Slide module into chassis until

module locking tabs ‘click’.

Locking tab

Printed
Circuit
Board

20861–M 20862–M

Publication 1756-IN058D-EN-P - October 2000