Rockwell Automation 1747-L40 SLC 500 Fixed Hardware Style - Manual (Page 61)

Chapter 4
Installing Your Hardware Components
4–6
beneath the battery connector OR to the right of the battery connector.
J2
J2
The High-Speed Counter jumper is located either
4. Replace the cover.
High-Speed Counter Input Compatibility
The high–speed counter input circuit has the following characteristics:
•
nominal input impedance of
≈
1200
Ω
•
on–state voltage of 10–30 VDC
•
nominal input current draw of 20mA
•
minimum pulse width of 62.5
µ
sec.
Your input device or encoder must be single–ended and be compatible with
the specifications of the high–speed counter input. See the table below for
more information.
For an Input Device or Encoder that Is Use an HSC Input Circuit that Is
Sourcing Sinking
Open Collector/ Sinking Sourcing
Open Collector with Pull-up Resistor Sinking