Allen-Bradley 1746 Series User Manual

Discrete I/O Modules 27
Publication 1746-IN005A-US-P
Relay Contact Ratings
Table 18:Relay Contact Rating Table for Output Modules 1746-OW4, -OW8,
and -OW16
Voltages:
Amperes
(1)
Amperes
(2)
Continuous
Volt-Amperes
Make Break Make Break
Maximum Volts (ac)
120 15 1.5
2.5 1800 180
240 7.5 0.75
Maximum Volts
(dc)
125
0.22
(3)
1.0 28
24
1.2
(3)
2.0 28
Table 19:Relay Contact Rating Table for Output Module 1746-OX8
Voltages:
Amperes
(1)
(1)Recommended surge suppression: For relay contact outputs, refer to the SLC 500
Installation and Operation Manual
, publication 1747-6.2. Connecting surge suppresors
across your external inductive load will extend the life of SLC 500 relay contacts.
Amperes
Continuous
(2)
(2)The continuous current per module must be limited so the module power does not
exceed 1440 VA.
Volt-Amperes
Make Break Make Break
Maximum Volts
(ac)
120 30 3.0
5.0 3600 360
240 15 1.5
Maximum Volts
(dc)
125
0.22
(3)
(3)For dc voltage applications, the make/break ampere rating for relay contacts can be
determined by dividing 28 VA by the applied dc voltage. For example, 28 VA/48V dc =
0.58A. For dc voltage applications less than 14V, the make/break ratings for relay
contacts cannot exceed 2A.
1.0 28
24
1.2
(3)
2.0 28
Allen-Bradley Spares

Allen-Bradley 1746 Series Specifications

General

Category	I/O Systems
Shock Resistance	30G
Backplane Current	Varies by module. Refer to individual module specifications.
Operating Temperature	0°C to 60°C (32°F to 140°F)
Storage Temperature	-40°C to 85°C (-40°F to 185°F)
Relative Humidity	5% to 95% (non-condensing)
Voltage Range	Varies by module. Refer to individual module specifications.
Series	Allen-Bradley 1746
Module Type	Digital/Analog I/O Modules