Rockwell Automation 1794-IJ2XT FLEX I/O Frequency Input Modules User Manual - Manual (Page 16)

Publication 1794-6.5.11 - September 2011
6 Overview of the Frequency Input Module
Input Capabilities The frequency module has 2 input channels (mode dependent). Each of the 2
input channels may accept these input signals:
• magnetic pickup – 500 mV…28V AC peak (optional 50 mV…28V AC
peak for increased signal sensitivity)
• proximity probe inputs
– compatible with Bently Nevada 3300 – 5 mm (0.197 in.) and 8 mm
(0.315 in.) – proximity transducer systems
– provides 1 isolated 24V DC power supply (2 channels rated at 30 mA
each) to power external devices
– vortex flowmeter – 6V and 3V
You configure the 2 input channels for your specific application(s). Each input
channel has two input selections:
Channel 0
Channel 1
Frequency Input (F0)
Gate Input (G0)
Frequency Input (F1)
Gate Input (G1)
Frequency Input (F0-F1) – you connect
your input device to this input (ac, proximity
sensors switch, magnetic, vortex )
Gate Input (G0-G1) – you connect your
input device to this input (ac, proximity
sensors switch, magnetic, vortex )
used to determine direction – CW or CCW
2 input channels
FREQ GATE
OK
0
FREQUENCY INPUT 2 CHANNEL
1
1794-IJ2 Allen-Bradley
F 0 F
FREQ GATE
1 F 1 F
OUT
0
OUT
1
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