www.atkinsonelectronics.com
Circuit Board Division
800.261.3602
3
Revised 09/18
Operation
The GSCM is powered by 12 to 24VDC from a battery
bank and will start generators for 12 to 48V systems.
For 48V systems the GSCM must be powered by a 24V
or less tap on the 48V battery bank. Adjustment for
the timing controls is done during the set–up period
using three push button switches on the front of the
GSCM unit. The up and down buttons allows the user
to move back and forth through the different timing
parameters, and change the value when in change
mode.
The change/ store buttons allows the user to change
and then store the new setting. LEDs indicate which
setting is being addressed and the stored value can be
read on the test points. For example: a crank delay
voltage setting of 2.5V is 50% of the 0 to 60 second
timing range or 30 seconds (See Adjustment Chart).
Timing values are stored in the memory regardless of
power removal until changed.
The GSCM comes factory pre-set:
Crank delay is set at 5 seconds
Maximum crank is set at 15 seconds
Load transfer delay is set at 60 seconds
Load pre-off delay is set at 90 seconds
Battery cut-in voltage is set at 11.5V
Battery cut-out voltage is set at 13.5V
Run/crank disconnect is set at 30Hz
Under and over speed shutdown is set at 0
30 day exercise runtime is set at 0 (de-activated)
The GSCM provides a 30 day exercise function which
can be synchronized with a photo voltaic input to only
start each 30 day period at the beginning of the solar
charge day. A user supplied DC relay can be energized
during the 30 day generator exercise to override a
battery charger and allow the battery bank to equalize
by charging the batteries above the normal charger
cutoff point during the exercise period.
Also, it will start and control
gas, propane &
diesel driven pumps
Specifications
SIZE:
5.5”L x 3.3”W x 1.5”H
WEIGHT:
20 Ounces
MOUNTING:
2 Screws through tabs
POWER:
12V to 30VDC
Quiescent current ˂ 10mA
Relay current ˂ 25mA each @ 12V
CONNECTIONS:
Qty. (29) 1/4” Spade terminals
ON-OFF INPUTS:
Grounded input = on condition
Open input = off condition
MANUAL INPUTS:
Grounded input = on condition
12-24V Outback signal = Start
Open = off
VOLTAGE INPUTS:
0-60VDC
FREQUENCY INPUTS: 120-300 VAC 0-100Hz
ADJUSTMENTS: Qty. (1) single turn potentiometer
(0-5VDC=adjustment range)
Crank Delay 0 to 60 seconds
Maximum Crank 0 to 60 seconds
Load Transfer Delay 0 to 60 seconds
Load Pre-Off 0 to 120 seconds
Battery Charge
Cut-In Voltage 0 to 60VDC
Cut-Out Voltage 0 to 60VDC
Under Speed Shutdown 15 to 75 Hz
Over Speed Shutdown 15 to 75 Hz
Run/Crank disconnect 15 to 75 Hz
30 Day Exercise Runtime 0 to 1 hour
OUTPUT RATINGS:
Qty. (5) 10Amp 28VDC Relay Contacts
Qty. (2) Open Collector NPN Transistors
FAULT DETECTION:
5 conditions that lock out generator
MAX. RUNTIME:
12 hours in automatic start
AMBIENT TEMP:
-30 to 70°C
