2
Selectable Contact Output Module Cat. No. 1771-OWN
Publication 17715.37 - October 1995
Low Voltage Directive
This apparatus is also designed 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 that the above norm requires, see the
appropriate sections in this manual, as well as the following
Allen-Bradley publications:
•
Industrial Automation Wiring and Grounding Guidelines,
publication 1770-4.1
•
Guidelines for Handling Lithium Batteries, publication AG-5.4
•
Automation Systems Catalog, publication B111
The controller or I/O chassis power supply, connected through the
backplane of the I/O chassis, powers the logic circuitry of the contact
output modules. This supply also provides the necessary power to
energize the coils of the module relays. The maximum current drawn
from this supply when all coils are energized is 2.5A. Nominal
backplane current is 1.8A.
When handling the module, observe the following warning:
!
ATTENTION: Remove power from the 1771 I/O
chassis backplane and field wiring arm before
removing or installing an I/O module.
•
Failure to remove power from the backplane or wir-
ing arm could cause module damage, degradation of
performance, or injury.
•
Failure to remove power from the backplane could
cause injury or equipment damage due to possible
unexpected operation.
The contact output module contains components which can be
damaged by electrostatic discharge. The module is shipped in an
electrostatic shielded bag for protection. Follow the handling
procedures outlined below to guard against damage to your module.
•
Touch a grounded object to discharge yourself before handling
the module.
•
Do not touch the backplane connector or connector pins.
•
If you configure or replace internal components, do not touch
other circuit components inside the module. If available, use a
static-safe work station.
•
When not in use, keep the module in its static-free shield bag.
Power Supply
Requirements
Initial Handling Procedure