Murphy Selectronic DT9805 user manual

Summary of the content on the page No. 1

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DT-8605N
Revised 07-97
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SELECTRONIC Digital Tachometer/TACHSWICH™ Section 20
(00-02-0180)
®
Installation Instructions
DT9800 Series
Please read the following information before installing. A visual inspection of this product for damage during shipping is
recommended before mounting. It is your responsibility to have a qualified person install this unit and make sure installation
conforms to NEC and local codes.
GENERAL INFORMATION
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WARNING
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BEFORE BEGINNING INSTALL

Summary of the content on the page No. 2

POS NEG NEG 150-400 90-150 NEG POS POS NEG DT9803 AND DT9804 TYPICAL WIRING WARNING: PERFORM THE WIRING INSTALLATION WITH THE POWER SOURCE OFF. DO NOT ROUTE TACHOMETER LEADS WITH PRIMARY IGNITION WIRING. Figure 2: DT9804 typical wiring for negative ground ignition DT9803 Connect the magnetic pickup cable conductors to the MPU terminal as shown in Figure 1. Use a two conductor shielded cable between the DT9803 and the magnetic pickup. Back of DT9804 Figure 1: DT9803 typical wiring MPU Negative

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If connecting to a Murphy LCDT annunciator refer to Figure 5. See DT9806 General Catalog for more information on the LCDT. Before wiring the DT9806, determine the output voltage and ground polarity of the ignition. Table 1 lists the Peak Output Voltage and Ground NOTE: When installing the DT9806 in a Murphy panel, always connect Polarity of some common ignitions. the DT9806 to the ignition/input side of the power adapter. If the DT9806 Figure 6 displays wiring to a negative ground ignition and F

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4 4 4 4 4 4 3 3 3 3 3 3 2 2 2 2 2 2 1 1 1 1 1 1 SETTING OVERSPEED SET POINTS: DT9805 AND DT9806 X 1000 X 100 X 10 The overspeed set point switches are available on the DT9805 and 0 0 0 DT9806 only. The overspeed set point can be set within ± 5 RPM, over a range of 0010 to 9990 RPM. Setting of the overspeed set points is made by properly adjusting of three rotary switches. Each switch can be adjusted in increments of ten. To set the switches perform the following: 1. Locate the three rotary switc