Specifications
Publication 1794-SG002D-EN-P - May 2012
28 Select FLEX I/O Modules
1794-OB16P Derating Curve
The area within the curve represents the safe operating range for the module
under various conditions of user supplied 24V DC supply voltages and ambient
temperatures.
= Normal mounting safe operating range included
= Other mounting positions (including inverted horizontal, vertical) safe
operating range
Current, on-state output,
max
500 mA per channel,
8 A per module
2.0 A per channel,
10 A per module
500 mA per channel,
14 A per module
(2)
500 mA per channel,
8 A per module
Leakage current, off-state
output, max
0.5 mA
Output surge current, max 1.5 A for 50 ms, repeatable
every 2 s
4 A for 50 ms, repeatable
every 3 s
2 A for 50 ms, repeatable every 2 s
Output delay time, OFF to
ON, max
0.5 ms 0.1 ms 0.5 ms
Output delay time, ON to
OFF, max
1.0 ms 0.1 ms 1.0 ms
External DC supply voltage
range
10…31.2V DC
(5% AC ripple)
19.2…31.2V DC
(5% AC ripple)
10…31.2V DC
(5% AC ripple)
External DC supply current
range
25…75 mA 20…35 mA 103…273 mA 20…65 mA
Power dissipation, max 5.0 W @ 31.2V DC 5.5 W @ 31.2V DC 5.3 W @ 31.2V DC 4.2 W @ 31.2V DC
Thermal dissipation, max 17.0 BTU/hr @ 31.2V DC 18.8 BTU/hr @ 31.2V DC 18.1 BTU/hr @ 31.2V DC 14.3 BTU/hr @ 31.2V 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), Basic
Insulation Type
Type tested at 2121V DC for 60
s, between field side and
system
No isolation between
individual channels
50V (continuous), Basic Insulation Type
Type tested at 850V DC for 60 s, between field side and
system
1794-OB8EPXT: Type tested at 1500V AC for 60 s, between
field side and system
No isolation between individual channels
50V (continuous), Basic
Insulation Type
Type tested at 1770V DC
for 60 s, between field side
and system
No isolation between
individual channels
(1) See 1794-OB16P Derating Curve.
(2) 6.0 A total for channels 0…15; 8.0 A total for channels 16…31.
Digital DC Protected Output Comparison
Specification 1794-OB16P, 1794-OB16PXT 1794-OB8EP,
1794-OB8EPXT
1794-OB32P 1794-OV16P
Ambient Temperature °C
V
in
On-State
Voltage
(V DC)