GAC ESD5550M Посібник - Сторінка 3

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WIRINg (CONTINUED)

An overspeed shutdown device, independent of the governor system, must be provided to prevent loss of engine control

which may cause personal injury or equipment damage. Do not rely exclusively on the governor system to prevent over-

speed. A secondary shutoff device such as a fuel solenoid must be used.

When wiring eSD55XX Series controllers:

Magnetic speed sensor wires connected to Terminals C and D MuST BE TWISTED AND/OR SHIELDED for their entire length. The

speed sensor cable shield should ideally be connected as shown. The shield should be insulated to ensure no other part of the shield

comes in contact with engine ground, otherwise stray speed signals may be introduced into the speed control unit.

With the engine stopped, adjust the gap between the magnetic speed sensor and the ring gear teeth. The gap should not be any

smaller than 0.020 in. (0.45 mm). usually, backing out the speed sensor 1/4 to 1/2 turn after touching the ring gear teeth will achieve

a satisfactory air gap. The magnetic speed sensor voltage should be at least 1.0 V AC RMS during cranking.

Use shielded cable for all external connections to the eSD controller.

One end of each shield, including the speed sensor shield, should be grounded to a single point on the ESD case.

Do not over-tighten terminals. Torque to no greater than 9.0 in-lb ±2.5 [1.01 ±0.28 N∙m].

ESD5550-5570 Series Speed Control Unit 1-2021-E1 PIB1003