DynaGen
TM
ES52 - EN
User Manual
8
9M02-9253-A001-EN
Revision A
3.2 Wiring Guidelines
WARNING
DO NOT APPLY EXTERNAL VOLTAGE TO ANNUNCIATOR OUTPUTS (TERMINALS 13
TO 18). THIS WILL DAMAGE THE ES52. IF THIS MAY OCCUR IN YOUR APPLICATION,
PLACE A DIODE IN SERIES WITH EACH AFFECTED ANNUNCIATOR OUTPUT.
•
DO NOT use wire smaller than 18 AWG
•
The connections supplying DC power to the ES52 panel should preferably run directly from the battery
posts with no splices or other connections except a 25A fuse connecting the positive line directly to the
+Battery terminal. Avoid, as much as possible, using the chassis (aluminum or iron engine parts) as a
return conductor for battery negative voltage; copper wiring is recommended. Failure to follow the above
may result in erratic operation, due to large voltage drops across the wiring connections
•
DO NOT short the Crank output or Fuel outputs to ground, as this will cause the onboard 20A fuse to
blow and may result in damage to the ES52’s onboard relays
•
When replacing the fuse, removable terminals, and relays, only use factory recommended parts
•
DO NOT use AC coil slave relays from controller outputs. Use intermediate relays of suitable size and
coil rating
Note:
All ES52 engine controllers are shipped standard with 12 VDC coil relays for +12 VDC
systems. If the engine controller is used in a +24 VDC system, the onboard relays MUST be
replaced with 24 VDC coil relays.
•
DO NOT exceed the maximum rated current and voltage on each of the controller outputs. Do not
exceed 10A for the Fuel output, 10A for the Crank output, and 300 mA for the Annunciation and Timer
outputs
•
The Annunciation and Timer outputs are internally protected against overload and short circuit (fault)
Note:
When a fault appears on one of the annunciation outputs, only that specific output becomes
un-operable; all other annunciation outputs and the entire front panel LEDs continue to
operate. When the fault is removed and the unit is restarted, the output resumes proper
operation.
•
Two wires must be connected for the speed signal
•
Diodes are provided across Fuel, Crank, and Annunciation outputs, to protect the outputs from inductive
kick-back. Diodes should be placed across slave relay contacts when used to actuate any inductive
loads, such as solenoids, to protect the contacts from damage caused by arcing. In addition to
prolonging the useful life of the relays, placing such diodes will help reduce generated electrical noise
•
To verify the operation of engine controller outputs, measure voltage (i.e., set meter to read in volts)
when outputs should be ON
!
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