Rockwell Automation 1797-IJ2 FLEX Ex Frequency Input Module - Manual (Page 16)

16 FLEX Ex Frequency Input Module
Publication 1797-5.9 - June 2010
Frequency input characteristics Magnetic pickup: 50 mV, 500 mV
NAMUR: 8V, 8 mA
Flowmeter: low <3V, high >6V
Frequency input impedance rating >5 k  magnetic pickup
>10 K
flowmeter
Outputs 2 relay outputs
Output switching time <10 ms
Gate inputs 2
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
Indicators 6 yellow status indicators
4 red fault indicators
1 green module power indicator
Output (intrinsically safe)
(16 pin male and female Flexbus
connector) U
o
< 5.8V
I
o
< 400 mA
L
i
< Negligible
C
i
< 2.64 F
Isolation path
Input to power supply
Input to Flexbus
Input to input
Output to power supply
Output to Flexbus
Output to output Isolation Type
Galvanic to DIN EN 60079-11
Galvanic to DIN EN 60079-11
None
Galvanic to DIN EN 60079-11
Galvanic to DIN EN 60079-11
Galvanic to DIN EN 60079-11
Power supply
(+V, -V intrinsically safe) U
i
< 9.5V dc
I
i
< 1 A
L
i
= Negligible
C
i
= Negligible
Module field-side power
consumption 4.25 W
Power dissipation 4.25 W
Specifications continued on next page.