5
Publication 1794-IN129B-EN-P - April 2009
General (Output)
Attribute
Value
Number of outputs
4 isolated (1794-OF4IXT)
2 isolated (1794-IF2XOF2XT)
Resolution
Voltage
Current
15 bits plus sign
0.320 mV/cnt
0.656
μ
A
/
cnt
Update rate
2.5/5.0/7.5 ms all channels (see input update rate table)
2.5/5.0 ms all channels (see input update rate table) (1794-OF4IXT)
Output current terminal
0 mA output until module is configured
4…20 mA (user configurable
0…20 mA (user configurable
Output voltage terminal
0V output until module is configured
±10V user configurable)
0…10V user configurable)
±5V user configurable)
0…5V user configurable)
Current load on voltage
output
3 mA maximum
Resistive load on current
output
0…750
Ω
General
Attribute
Value
Module location
Cat. No. 1794-TB2, 1794-TB3, 1794-TB3S, 1794-TB3T, 1794-TB3TS,
and 1794-TBN
Data format
2’s complement
2’s complement %
binary
offset binary
Conversion type
Sigma Delta
Digital to analog converter (1794-OF4IXT)
Update rate
2.5/5.0/7.5 ms all channels (see input update rate table)
2.5/5.0 ms all channels (see input update rate table) (1794-OF4IXT)
Normal mode rejection ratio
- voltage or current Terminal
-3 dB @ 12 Hz (300 Hz conversion rate)
-80 dB @ 50 Hz (300 Hz conversion rate)
-3 dB @ 6 Hz (150 Hz conversion rate)
-80 dB @ 60 Hz (150 Hz conversion rate)
Common mode rejection
ratio
-120 dB @ 50/60 Hz
Step response to 63% -
voltage or current terminal
(1794-IF4IXT,
1794-IF2XOF2XT)
1200 Hz conversion rate = 0.6 ms
600 Hz conversion rate = 06.7 ms
300 Hz conversion rate = 13.4 ms
150 Hz conversion rate = 26.7 ms
Step response to 63% of full
scale (1794-OF4IXT,
1794-IF2XOF2XT)
< 25
μ
s
Absolute accuracy
(1)
voltage terminal
current terminal
0.1% Full Scale @ 25 °C
0.1% Full Scale @ 25 °C
Accuracy drift with
temperature
Voltage terminal
Current terminal
0.0028% Full Scale/°C (1794-IF4IXT, 1794-IF2XOF2XT)
0.0012% Full Scale/°C (1794-OF4IXT)
0.0038% Full Scale/°C (1794-IF4IXT, 1794-IF2XOF2XT)
0.0025% Full Scale/°C (1794-OF4IXT)
Calibration required
Factory calibrated. Can be calibrated in field when necessary
Maximum overload
30V continuous or 32 mA continuous, one channel at a time.
Indicators
1 red/green power/status indicator
Isolation voltage
120V (continuous), Basic Insulation Type, when used with 1794-TB2,
1794-TB3, 1794-TB3S, 1794-TB3T, or 1794-TB3TS
250V (continuous), Basic Insulation Type, when used with 1794-TBN
Type tested at 1500V AC for 60 s and Routine tested at 2550V DC for
1 s, between channel to power, channel to system, and power to
system, and channel to channel
Flexbus current
50 mA
Power dissipation
2.0 W maximum @ 31.2V DC
Thermal dissipation
Maximum 6.8 BTU/hr @ 31.2V DC
Keyswitch position
3 (1794-IF4IXT)
4 (1794-OF4IXT)
5 (1794-IF2XOF2XT)
External DC Power Supply
voltage
Voltage range
Supply current
24V DC nominal
19.2…31.2V DC (includes 5% AC ripple)
80 mA @ 24V DC (1794-IF4IXT)
210 mA @ 24V DC (1794-OF4IXT)
150 mA @ 24V DC (1794-IF2XOF2XT)
Dimensions
46 mm x 94 mm x 75 mm (1.8 in. x 3.7 in. x 2.95 in.) with module
installed in base
Wire size
Determined by installed terminal base
Wiring category
(2)
2 - on signal ports
2 - on power ports
Wire type
Shielded on signal ports
Enclosure
None (open-style)
Terminal screw torque
Determined by installed terminal base
North American temp code
T4
IEC temp code
T4
(1)
Includes offset, gain, nonlinearity and repeatability error terms.
(2)
Use this Conductor Category information for planning conductor routing. Refer to Industrial Automation Wiring and
Grounding Guidelines, publication
1770-4.1.
Environmental
Attribute
Value
Operating
temperature
IEC 60068-2-1 (Test Ad, Operating Cold),
IEC 60068-2-2 (Test Bd, Operating Dry Heat),
IEC 60068-2-14 (Test Nb, Operating Thermal Shock):
-20…70 °C (-4…158 °F)
Non-operating
temperature
IEC 60068-2-1 (Test Ab, Unpackaged Non-operating Cold),
IEC 60068-2-2 (Test Bb, Unpackaged Non-operating Dry Heat),
IEC 60068-2-14 (Test Na, Unpackaged Non-operating Thermal Shock):
-40…85 °C (-40…185 °F)
Relative
humidity
IEC 60068-2-30 (Test Db, Unpackaged Damp Heat):
5…95% noncondensing
Vibration
IEC 60068-2-6 (Test Fc, Operating):
5 g @ 10…500 Hz
Operating shock
IEC 60068-2-27 (Test Ea, Unpackaged Shock):
30 g
Non-operating
shock
IEC 60068-2-27 (Test Ea, Unpackaged Shock):
50 g
Emissions
CISPR 11:
Group 1, Class A (with appropriate enclosure)
ESD immunity
IEC 61000-4-2:
6 kV contact discharges
8 kV air discharges
General
Attribute
Value
