Rockwell Automation 1797-IJ2 FLEX Ex Frequency Input Module - Manual (Page 15)

FLEX Ex Frequency Input Module 15
Publication 1797-5.9 - June 2010
Specifications
Specifications - 1797-IJ2 Frequency Input Module
Number of inputs 2 frequency channels
2 gate channels
IS input type Ex ia IIB/IIC T4
AEx ia IIC T4
Class I, II, III Division 1 Group A to G T4
IS module type Ex ib IIB/IIC T4
AEx ib IIC T4
Class I, Division 1 Group A to D T4
Input (intrinsically safe) to DIN19234
(NAMUR)
No load voltage short circuit
current
Switching point/switching
hysteresis
Input pulse length/pulse pause
Lead breakage monitoring
8V dc/8 mA
1.2…2.1 mA/0.2 mA
>20 s/>20 s
Breakage current <0.35 mA
Inputs to flowmeter
Input signal
Voltage available at 20 mA Threshold 3V or 6V selectable
>15V
Inputs to magnetic pickup input
signal 50 mV or 500 mV selectable
Processing time 4 ms
Input frequency 1.0…32,767 Hz
Resolution and accuracy Minimum Frequency Resolution
Sampling Time (ms) Accuracy (%)
2 0.043
4 0.033
5 0.031
10 0.027
20 0.025
50 0.023
100 0.023
200 0.023
500 0.023
1000 0.023
Specifications continued on next page.