ISSPRO R4901 - Manual

ISSPRO, INC. 2515 N.E. Riverside Way, Portland OR 97211
Telephone: (503) 288-4488 Š Toll Free: (800) 888-8065
FAX: (503) 249-2999
Form No. IS005 (12/13/99 Rev. B) Page 1 of 2
Single Level Speed Switch: P/N R4901
Serial No. _____________________________. This number corresponds to the number inside and on the
bottom of the speed switch of identification.
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Order Information:
[ ] Sensor Input: Pulses per revolution (gear teeth, magnets, etc.) = _____________________
[ ] Ignition Input: Number of cylinders = _____________________
[ ] R8970 (R870) sender: For 1 engine rev the sender drive turns: ______________________ rev(s);
For vehicle speed: Turns per mile (transmission cable drive) = _________________
Trip Point = ________________ [ ] RPM or [ ] MPH
Range (if specified) = ___________________ to __________________ (RPM or MPH)
[ ] Not latched or [ ] latched
Operating voltage = [ ] 12 VDC or [ ] 24 VDC
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General Information:
Output: Relay contacts – normally open (NO), normally closed (NC), and common (COM): the common contact
switches from the normally closed to the normally open contact at and above the trip point.
Output Rating (maximum): 1 amp @ 24 VDC resistive, 0.3 amp @ 24 VDC inductive (coil load)
IMPORTANT: If amp load exceeds the above amperage, an optional relay such as the R7021 is necessary.
Operating Voltage:
12 V units: 10 – 16 VDC
24 V units: 16 – 30 VDC
Reverse Voltage Protection:
12 V units: -12 VDC indefinitely, -400 V transients
24 V units: -24 VDC indefinitely, -400 V transients
Latch Option:
If latch option is specified, the output (after the trip point) will remain energized until the power is
removed from the unit for approximately one second.
Adjusting the Trip Point:
The trip point is factory set as ordered. If necessary, it can be adjusted with a small screwdriver. Remove
the cover to access the adjustment. See the diagram on the reverse side of location. Turning counter-clockwise
(CCW) increases the speed setting. Make only a small change and then recheck the trip point.