Technical data

Publication 1794-2.1 - January 2000
144 24V dc 2 Input Pulse Counter Module Cat. No. 1794-ID2 FLEX I/O and FLEX Integra Product Data
Specifications - 1794-ID2
Input Specifications
Number of Counters 2
Number of Inputs
per Counter
4 inputs (A, B, Z, G)
Input Pulse Width (Minimum) Each signal condition must be stable for at least
2µs to be recognized
Counting Frequency 100KHz maximum
Input Range
Input ON
Input OFF
Maximum 26.4V dc (24V dc ±10%)
Minimum 6V dc
Maximum 3V dc
Minimum -26.4V dc
Input Current (Typical) 3mA @ 6V dc
9mA @ 12V dc
15mA @ 24V dc
General Specifications
Module Location Cat. No. 1794-TB3, -TB3S, -TBN, and -TBNF
Terminal Base Units
Isolation Voltage 500V dc
Flexbus Current 5mA @ 5V dc
Power Supply 12-24V dc (+
10%)
Current Consumption from
External Power Supply
150mA @ 12V dc
75mA @ 24V dc
Power Dissipation 5W maximum @ 26.4V dc
Thermal Dissipation Maximum 17.1 BTU/hr @ 26.4V dc
Indicators (field side driven,
logic side indication)
1 green/red power/status indicator
Input:
12 yellow status indicators - logic side
Keyswitch Position 1
Dimensions HxWxD 46mm x 94mm x 53mm (1.8in x 3.7in x 2.1in)
Environmental Conditions
Operational Temperature
Storage Temperature
Relative Humidity
Shock Operating
Nonoperating
Vibration
0 to 55
o
C (32 to 131
o
F) Note: Do not connect
maximum input voltage simultaneously to all
inputs if the module ambient temperature is
expected to exceed 40
o
C (104
o
F).
-40 to 85
o
C (-40 to 185
o
F)
5 to 90% noncondensing (operating)
5 to 80% noncondensing (non-operating)
30g peak acceleration, 11(±1)ms pulse width
50g peak acceleration, 11(±1)ms pulse width
Tested 5g @ 10-500Hz per IEC 68-2-6
Input Conductors
Wire
Category
Length (Maximum)
Belden 8761
2
1
1000ft (304.8m)
Publications
Installation Instructions
User Manual
1794-5.63
1794-6.5.15
Agency Certification
1 Use this conductor category information for planning conductor routing. Refer to
publication 1770, 4.1, “Industrial Automation Wiring and Grounding Guidelines for Noise
Immunity.”