Rockwell Automation Publication 1794-IN104C-EN-P - July 2018
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FLEX I/O 220V AC Digital Input and Output Modules
Specifications – 220V AC Output Module 1794-OM8
Attribute
Value
Number of outputs
8, nonisolated
Recommended terminal base unit
1794-TBN, 1794-TBNF, 1794-TBNK, 1794-TBNFK
Module mounting
See
Derating Curve for 1794-OM8
Output voltage, min
159V AC
Output voltage, nom
240V AC
Output voltage, max
264V AC
Output current rating
4.0 A (8 outputs @ 500 mA)
On-state current, min
50 mA per output
On-state current, max
500 mA per output @ 55 °C
On-state voltage drop, max
1.5V AC @ 0.5 A
Surge current
7 A for 40 ms each, repeatable every 8 seconds
Off-state leakage, max
2.5 mA
Isolation voltage
250V (continuous), Basic Insulation Type, field side to backplane
Type tested @ 1530V AC for 60 s
No isolation between individual channels
Output signal delay
(1)
Off to On
On to Off
1/2 cycle max
1/2 cycle max
Flexbus current
60 mA @ 5V DC
Power dissipation, max
5.0 W @ 0.5 A
Thermal dissipation, max
17.1 BTU/hr @ 0.5 A
Fusing (when using the 1794-TBNF)
(2)
0.8 A, 250 slow-blow fuse (5 X 20 mm SAN-O MQ4-800 mA)
(1)
Delay time is the time from the receipt of an output on or off command to the output actually turning on or off.
(2)
Module outputs are not fused. We recommend that outputs be fused. If not using the 1794-TBNF, and fusing is desired, it
must be provided externally.
