Specifications

Publication 1794-SG002D-EN-P - May 2012
Select FLEX I/O Modules 27
FLEX I/O Digital DC Protected Output Modules
• 1794-OB16P provides 16 sourcing 1/2 Amp outputs self-protected
against shorts, overloads, and over temperature. The faulted output will
automatically return when the fault is removed. No feedback to the
processor is provided.
• 1794-OB16PXT is the extended temperature version of the 1794-OB16P
module. The module is conformal coated.
• 1794-OB8EP provides 8 sourcing 2 Amp outputs with electronic fuse type
of overload protection, which opens when overloaded. The fuse can be
'reset' several ways. Fault status is provided to the processor.
• 1794-OB8EPXT is the extended temperature version of the 1794-OB8EP
module. The module is conformal coated.
• 1794-OB32P provides 32 self-protected sourcing 1/2 Amp outputs in 2
groups of 16 outputs. Separate voltage sources can be used with
each group.
• 1794-OV16P is the sinking version of the 1794-OB16P.
Thermal dissipation, max 11.2 BTU/hr
@31.2V DC
18.1 BTU/hr
@31.2V DC
14.3 BTU/hr
@ 31.2V DC
8.53 BTU/hr @
31.2V DC
3.41 BTU/hr @
5.5V DC
12.6 BTU/hr
@ 60V DC
Dimensions (HxWxD),
approx
46 x 94 x 53 mm (1.8 x 3.7 x 2.1 in.)
94 x 94 x 69 mm (3.7 x 3.7 x 2.7 in.) installed
Isolation voltage 50V continuous, I/O to system
Tested to 850V DC for 1 s, I/O to system
No isolation between individual
channels
50V continuous
Tested 1770V DC
for 60 s, I/O to
system
No isolation
between
individual
channels
50V (continuous), Basic Insulation Type,
between field side and system
Type tested at 707V DC for 60 s,
between field side and system
No isolation between individual
channels
75V continuous, I/O
to system
Tested to 1900V DC
for 1 s, I/O to
system
(No isolation
between individual
channels)
(1) OFF to ON delay is the time from a valid output ON signal to output energization. ON to OFF delay is the time from a valid output OFF signal to output de-energization.
Digital DC Output Comparison
Specification 1794-OB8 1794-OB16 1794-OV16 1794-OV32 1794-OG16 1794-OC16
Digital DC Protected Output Comparison
Specification 1794-OB16P, 1794-OB16PXT 1794-OB8EP,
1794-OB8EPXT
1794-OB32P 1794-OV16P
Voltage, on-state output,
nom
24V DC, sourcing 24V DC, sinking
Voltage, on-state output,
min
10V DC 19V.2 DC 10V DC
Voltage, on-state output,
max
31.2V DC
(1)
31.2V DC
Voltage drop, on-state
output, max
0.5V DC 0.2V DC 0.5V DC 0.2V DC
Terminal base unit 1794-TB2, 1794-TB3,
1794-TB3S, 1794-TB3K,
1794-TB3SK
1794-TB2, 1794-TB3,
1794-TB3S, 1794-TBN,
1794-TB3K, 1794-TB3SK,
1794-TBNK
1794-TB32, 1794-TB32S 1794-TB3, 1794-TB3S,
1794-TB3K, 1794-TB3SK
Current on-state output,
min
1.0 mA per channel