Kussmaul Electronics 091-75-AT - Manual (Page 2)

NOTE
The Load Manager Mark IV-AT is designed to operate relays. It is not
necessary to connect to all the outputs. Any outputs, at the discretion of
the installer, may remain unused. Nothing should be connected to the
unused outputs. Relays must have a coil resistance of 40 Ohms or
greater.
DO NOT LOAD ANY OUTPUT WITH A RELAY WITH A
RESISTANCE LESS THAN 40 OHMS
INTRODUCTION
The Load Manager Mark IV-AT is a 9-channel sequencer and load shedding controller which controls
9 external relays that are supplied by the installer. Provision has been made to permit the installer to
sequence only a total of 5, 6, 7, 8 or 9 channels. Those channels for which sequencing is not selected
will be energized constantly and controlled only by there own external, manually controlled switches or
by the load management circuits.
Load management for the 9 channels is completely independent of the sequencing function. Nine "dip
switches" are provided, one for each channel to establish the load shedding priority. These switches
permit an absolutely arbitrary selection of the shedding sequence and in addition permit any of the
channels to be "locked out" and not be load shed under any circumstances.
In addition to the sequencing/load management functions, this device provides a High Idle control to
increase engine speed and thus the alternator output. The High Idle output operates an external relay
or other device provided by the installer. The High Idle signal is the first output obtained when the Load
Manager Mark IV-AT senses low voltage. It remains until the voltage rises to the point at which no loads
are shed and in addition continues to maintain the higher engine speed for 5 minutes. This guarantees
that engine speed cycling is minimized.