Technical data

Publication 1794-2.1 - January 2000
138 24V dc 2 Input Frequency Module Cat. No. 1794-IJ2 FLEX I/O and FLEX Integra Product Data
Input Specifications (continued)
Frequency Input Impedance >5KΩ for 50mV extended magnetic pickup
>5KΩ for 500mV magnetic pickup
>10KΩ for 3V vortex flowmeter
>10KΩ for 6V vortex flowmeter
>2.5KΩ for 24V dc IEC1+ proximity or encoder
input
>2.5KΩ for 24V dc contact switch input
Gate Input Impedance >5KΩ for 50mV extended magnetic pickup
>5KΩ for 500mV magnetic pickup
>2.5KΩ for 24V dc IEC1+ proximity or encoder
input
>2.5KΩ for 24V dc contact switch input
Output Specifications (meets IEC 1A 24V dc output specification)
Number of Outputs 2 isolated
Output Voltage Source Customer supplied
Output Voltage
Minimum
Nominal
Maximum
10V dc
24V dc
31.2V dc
Off-State Voltage (maximum) 31.2V dc
On-State Current
Minimum
Maximum
1.0mA per output minimum
1.0A per channel sourced out of module
Current Limited: All outputs can be on
simultaneously without derating
Surge Current 2A for 50ms, repeatable every 2s
Off-State Leakage (max) <300µA @ 31.2V dc
On-State Voltage Drop (max) 0.9V dc @ 1A
Output Control Outputs individually assignable to:
Frequency,% full scale, or acceleration alarm
Output Switching Time Triggered by frequency alarm or acceleration alarm
Turn On: <0.5ms
Turn Off: <1ms
General Specifications
External dc Power
Supply Voltage
Voltage Range
Supply Current
(Input for +5V logic and 24V dc/dc converters)
24V dc nominal
19.2 to 31.2V dc (includes 5% ac ripple)
220mA @ 19.2V dc; 180mA @ 24V dc; 140mA @
31.2V dc
Isolated dc Power
Supply Voltage
Voltage Range
Supply Current
Peak ac Ripple
(Output to sensors and encoders)
24V dc nominal
21.6 to 26.4V dc
0-60mA maximum @ 24V dc
(4 devices @ 15mA = 60mA)
100mV maximum
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
Non-operating
Vibration
0 to 55
o
C (32 to 131
o
F)
-40 to 85
o
C (-40 to 185
o
F)
5 to 95% 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
304.8m (1000ft)
Output Conductors
Wire
Category
Belden 8761
2
1
Publications
Installation Instructions
User Manual
1794-5.49
1794-6.5.11
Agency Certification
1 Use this conductor category information for planning conductor routing. Refer to
publication 1770-4.1, “Industrial Wiring and Grounding Guidelines for Noise Immunity.”
Class I Division 2 certified
Groups A, B, C, D certified
Class I Zone 2 Group IIC certified