Specifications

Publication 1794-SG002D-EN-P - May 2012
Select FLEX I/O Modules 55
1794-OF4I and 1794-OF4IXT Isolated Analog 4 Output Module
The 1794-OF4I modules provides 4 isolated outputs for 2-, 3-, and 4-wire output
devices that use voltage in the range of ±10V or 0…20 mA current.
1794-OF4IXT is the extended temperature version of the 1794-OF4I module.
Power dissipation, max 4.0 W @ 31.2V DC
4.3 W @ 24V DC
4.0 W @ 10.0V DC
Thermal dissipation, max 14.7 BTU/hr @ 24V DC
Wire size 0.34... 2.5 mm
2
(22...12 AWG) solid or stranded shielded copper
wire rated at 75 °C (167 °F) or greater 1.2 mm (3/64 in.)
insulation max
Wire category 2 – on signal ports
2 – on power ports
(1)
Dimensions (HxWxD), approx 46 x 94 x 53 mm (1.8 x 3.7 x 3.1 in.)
94 x 94 x 69 mm (3.7 x 3.7 x 2.7 in.) installed
(1) Use this Conductor Category information for planning conductor routing. Refer to Industrial Automation Wiring
and Grounding Guidelines, publication 1770-4.1
.
Isolated Analog 4 Output Module
Specification 1794-OF4I, 1794-OF4IXT
Output resolution 15 bit + sign
0.656 μA/cnt
0.320 mV/cnt
Data format 2’s complement
2’s complement percent
binary
offset binary
Output conversion type Digital to analog converter
Output conversion rate 2.5/5.0 ms
Step response to 63% of FS,
output
Current or voltage output: <25 μs
Current load on voltage output,
max
3 mA
Output current, resistive load 0…750 Ω
Accuracy Current input: 0.1% Full Scale @ 25 °C (77 °F)
Voltage input: 0.1% Full Scale @ 25 °C (77 °F)
(1)
Accuracy drift w/temp Current input: 0.0025% Full Scale /°C
Voltage input: 0.0012% Full Scale/°C
Calibration Factory calibrated
Isolation voltage 120V (continuous), when used with 1794-TB2, 1794-TB3,
1794-TB3S, 1794-TB3T, or 1794-TB3TS
250V (continuous), when used with 1794-TBN
Type tested at 1500V AC for 60 s, and 2550V DC for 1 s, channel
to channel, I/O to system
Analog 12 Output Module
Specification 1794-OE12