Isspro R4901 User Manual download pdf

ISSPRO, INC. 2515 N.E. Riverside Way, Portland OR 97211

Telephone: (503) 288-4488  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

*******************************************************************************************

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.

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FAX: (503) 249-2999 1

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Page 1 - FAX: (503) 249-2999

ISSPRO, INC. 2515 N.E. Riverside Way, Portland OR 97211 Telephone: (503) 288-4488  Toll Free: (800) 888-8065 FAX: (503) 249-2999 Form No. IS005 (1

Page 2

Form No. IS005 (12/13/99 Rev. B) Page 2 of 2 Installation Hints: 1.) Unit is not sealed…mount in cab, etc., away from harsh environments. 2.) Groun

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Isspro R4901 User Manual

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