GAC ESD5550 Series Manual

1
INTRODUCTION
The ESD5550/5570 series speed control unit is an all electronic device de-
signed to control engine speed with fast and precise response to transient
load changes. This closed loop control, when connected to a proportional
electric actuator and supplied with a magnetic speed sensor signal, can con-
trol a wide variety of engines in an isochronous or droop mode. Designed
for high reliability and built ruggedly to withstand the engine environment.
ESD5550/5570 Series speed control unit features include:
• Simple installation
• Starting Fuel and Speed Ramping adjustments to minimize engine ex-
haust smoke prior to attaining engine operating speed
• Adjustable droop and idle operation
• Inputs for accessories used in multi-engine or special applications
• Protection against reverse battery voltage, transient voltages, acciden-
tal short circuit of the actuator and fail safe design in the event of loss of
speed sensor signal or battery supply.
• Light Force Actuation (ESD5570 only)
The ESD5550/5570 Series speed control unit is compatible with all GAC
proportional actuators except the ACB2001 electric actuator. When paired
with a GAC ADC100 Series electric actuator, DROOP adjustment range is
less due to the ADC100's low current demand.
2
SPECIFICATIONS
Performance
Isochronous / Steady State
Stability
Speed Range / Governor
Speed Drift with Temperature
Idle Adjust CW
Idle Adjust CCW
Droop Range
Droop Adjustment MAX
(K-L Jumpered)
Droop Adjustment MIN
(K-L Jumpered)
Remote Variable Speed Range
Speed Trim Range
Terminal Sensitivity
InPUT / oUTPUT
Operating Voltage
Polarity
Power Consumption
Actuator Current Range at 77 °F
(25 °C) - Inductive Load
Speed Sensor Signal
Speed Switch Relay Contacts
(N.O. and N.C.)
ESD5550 & ESD5570 Series
Speed Control Unit
± 0.25 % or better
1 K - 7.5 K Hz continuous
60 % of set speed
Less than 1200 Hz
1 - 5 % regulation
400 Hz, ±75 Hz per 1 A change
415 Hz, ±75 Hz per 1 A change
500 - 7.5 Hz or any part thereof
J 100 Hz ±15 Hz/V @ 5.0 kΩ Impedance
L 735 Hz ±60 Hz/V @ 65 kΩ Impedance
N 148 Hz ±10 Hz/V @1 MΩ Impedance
P 10 V DC Supply @ 20 mA MAX
12 VDC or 24 VDC (Transient and
Reverse Voltage Protected)*
Negative Ground (Case Isolated)
50 mA continuous
plus actuator current
Minimum 2.5 A
10 A Peak**
0.5 to 120 V RMS
Vibration
Testing
±1 % MAX
Ambient Temperature Range
Relative Humidity
Shock
All Surface Finishes
Agency
Dimension
± 200 Hz
Weight
Mounting
* Protected against reverse voltage by a series diode. A 15 amp fuse must be installed in
the positive battery lead.
** Protected against short circuit to actuator (shuts off current to actuator), unit automati-
10 A
cally turns back on when short is removed.
1 ESD5550-5570 Series Speed Control Unit 9-2020-E PIB1003
Governors America Corp. © 2020 Copyright All Rights Reserved
reLIaBILITY
100% Functional Testing
envIronmenTaL
-40° to 85 °C (-40° to 180 °F)
Fungus Proof, Corrosion Resistant
comPLIance / STanDarDS
CE, RoHS, Lloyds Register,
DNV/GL, Bureau Vertas
PHYSIcaL
See Section 3, Installation
Any position, vertical preferred
5 g @ 20 - 500 Hz
up to 95 %
20 g @ 11 ms
1.8 lbf (0.82 kgf)