18
FLEX I/O Digital DC Output Modules
Publication 1794-IN094C-EN-P - July 2015
Specifications
Specifications – 1794-OB8
Attribute
Value
Number of outputs
8, current, sourcing
Recommended terminal base unit
1794-TB2, 1794-TB3, 1794-TB3S,1794-TB3K, 1794-TB3SK
On-state voltage, output min
10V DC
On-state voltage, output nom
24V DC
On-state voltage, output max
31.2V DC
Output current rating
4 A (8 outputs @ 0.5 A)
On-state current, output, min
1.0 mA per channel
On-state current, output, max
500 mA per channel
On-state voltage drop, max
0.5V DC
Surge current
2 A for 50 ms, repeatable every 2 seconds
Off-state leakage current, max
0.5 mA
Isolation voltage
50V (continuous), Basic Insulation Type
Tested at 850V DC for 1 s, between user and system
No isolation between individual channels
Output signal delay
(1)
Off to On
On to Off
(1)
Delay time is the time from the receipt of an output on or off command to the output actually turning on or off.
0.5 ms
1.0 ms
FlexBus current
60 mA @ 5V DC
Power dissipation, max
3.3 W @ 31.2V DC
Thermal dissipation, max
11.2 BTU/hr @ 31.2V DC
Fusing
Module outputs are not fused. Fusing is recommended. If fusing
is desired, you must provide external fusing. Use SAN-O
MQ4-800mA fuses.
Specifications – 1794-OB8EP
Attribute
Value
Number of outputs
8, current, sourcing
Recommended terminal base unit
1794-TB2, 1794-TB3, 1794-TB3S, 1794-TBN, 1794-TB3K,
1794-TB3SK, 1794-TBNK
On-state voltage, output min
19.2V DC