Rockwell Automation 1771-OW16/B Electro Mechanical Relay Contact Output Module - Manual (Page 5)

Publication 1771-IN069B-EN-P - November 2005
Electromechanical Relay Contact Output Module 5
Preinstallation
Considerations This module must be used with a 1771-A1B through 1771-A4B or later
chassis. It may also be used in a 1771-AM1 or 1771-AM2 chassis. This module
does not contain surge limiting circuitry. With properly chosen surge limiting
devices, this module can be used to control resistive, capacitive, and inductive
loads.
The module’s outputs are arranged in two groups of eight, each output is
independently isolated. The first group of outputs are arranged as
normally-open contacts, and the second group of outputs are arranged as
selectable normally-open or normally-closed contacts.
Refer to Specifications on page 12 for complete output specifications.Relay
Reliability
Varying load conditions can drastically shorten relay life. Operation at the
same load conditions, preferably at low loads, delivers long relay life. Do not
operate relays at low current or voltage after operating them at high power
conditions. Operations at low power first, followed by high power, is
acceptable.
Relay Environment
Relays in this module are not hermetically sealed. Do not use this module in
environments with contaminants such as acid, ammonia, nitrogen, and
chlorine.
Module Loading
Both minimum current and minimum voltage specifications are given to assure
there is always a good conduction surface between the relay’s contacts. The
relays will function at less than minimum specified voltages and currents, but
module reliability is not guaranteed.
Exceeding the module’s maximum power ratings wil shorten the life of the
relay contacts. Do not operate this module with voltage, current, or power
levels higher than the maximum specifications, as given in the Specifications
section of this installation instruction.