Specifications – Rockwell Automation 1794-IF4ICFXT FLEX I/O Isolated Input Analog Module User Manual
Page 4
4
Publication 1794-IN130A-EN-P - December 2009
Set the Input Filters
Power/status Indicator
The OK status indicator is bicolor red and green. The indicator flashes
green for any of the following 3 reasons:
1. The module configuration word is zero (for example, powerup
reset condition).
2. The 24V DC user power is off.
3. The module is in configuration mode.
The indicator displays red to indicate the module did not pass the initial
hardware test. Recycle power.
After powerup, if the status indicator is not flashing green or solid green,
recycle module power to verify a proper reset of the bus interface.
Specifications
1
1
0
1
4…20 mA
7.5 ms
5.0 ms
1
1
1
0
±10V
2.5 ms
2.5 ms
1
1
1
1
±5V
2.5 ms
2.5 ms
(1)
When IT = 1, the channel update rate for all channels is determined by the slowest channel.
Input Channel Configuration
03
02
01
00
Set these bits for channel 0
07
06
05
04
Set these bits for channel 1
11
10
09
08
Set these bits for channel 2
15
14
13
12
Set these bits for channel 3
Bit Settings
A/D Conversion Rate
Low Pass Filter
0
0
0
0
1200 Hz
No low pass
0
0
0
1
1200 Hz
100 ms low pass
0
0
1
0
1200 Hz
500 ms low pass
0
0
1
1
1200 Hz
1000 ms low pass
0
1
0
0
600 Hz
No low pass
0
1
0
1
600 Hz
100 ms low pass
0
1
1
0
600 Hz
500 ms low pass
0
1
1
1
600 Hz
1000 ms low pass
1
0
0
0
300 Hz
No low pass
1
0
0
1
300 Hz
100 ms low pass
1
0
1
0
300 Hz
500 ms low pass
1
0
1
1
300 Hz
1000 ms low pass
1
1
0
0
150 Hz
No low pass
1
1
0
1
150 Hz
100 ms low pass
1
1
1
0
150 Hz
500 ms low pass
1
1
1
1
150 Hz
1000 ms low pass
General
Attribute
Value
Module location
Cat. No. 1794-TB2, 1794-TB3, 1794-TB3S, 1794-TB3T, 1794-TB3TS, and 1794-TBN
Number of inputs
4 isolated
Resolution
Voltage
Current
16 bits - unipolar; 15 bits plus sign - bipolar
0.156 mV/cnt unipolar; 0313 mV/cnt bipolar
0.320
μ
A
/
cnt unipolar;
0.640
μ
A
/
cnt bipolar
Update rate
2.5/5.0/7.5 ms all channels (see input update rate table)
Input current terminal
4…20 mA (user configurable)
0…20 mA (user configurable)
±20 mA (user configurable)
Input voltage terminal
±10V (user configurable)
0…10V (user configurable)
±5V (user configurable)
0…5V (user configurable)
Input Resistance
Voltage terminal
Current terminal
>10 M
Ω
<100
Ω
(3)
Data format
2’s complement
2’s complement %
binary
offset binary
Conversion type
Sigma Delta
Update rate
2.5/5.0/7.5 ms all channels (see input update rate table)
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
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
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
0.0038% Full Scale/°C
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
External DC Power
Supply voltage
Voltage range
Supply current
24V DC nominal
SUPPLY: 19.2-31.2V DC, 80 mA
FLEXBUS: 5V DC, 50 mA
Input: 0…20 mA, ±10V DC
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 type rating
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
(3)
If 24V DC is removed from the module, input resistance = 10 k
Ω
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
General
Attribute
Value