LT-12PREG-1
8
Charles Industries, Ltd. All rights reserved. Printed in the United States of America.
Pin #
Function
Required
Signal Name
13
STATE
NO
A positive going signal that provides troubleshooting information identical to
the green Status LED (see Table 5). Maximum current permitted from the
STATE output is 0.05 Amps.
14
LIM
NO
If connected to battery voltage, the regulator is duty-cycle-current limited at
the setting of potentiometer R11 (see Figure 1).
15
EQL
NO
This input is used to select either the regulator’s equalization mode or a
second duty cycle current limit, depending on internal jumper P1. This input
is activated when battery voltage is applied to EQL. The duty-cycle current
limit is adjusted with potentiometer R12 (see Figure 1).
Voltage and Absorption Time Setpoints
Voltage and the time of the absorption cycle are controlled by internal dipswitch S1. Select a charge profile by
setting the battery type switches on S1 according to Table 4.
Voltages and absorption time should be measured with the temperature sensor disconnected.
IMPORTANT
Table 4. Voltage and Absorption Time Dipswitch Settings
Battery Type
S1–1
S1–2
S1–3
Absorption (v)
Float (v)
Eq. (v)
Thick Plate Liquid
OFF
OFF
OFF
14.4
13.6
16.2
Medium Plate Liquid
ON
OFF
OFF
14.4
13.6
16.2
East Penn Gel
OFF
ON
OFF
14.1
13.4
—
Concorde AGM
ON
ON
OFF
14.3
13.3
15.5
Optima
OFF
OFF
ON
14.3
13.4
15.5
Exide Gel
ON
OFF
ON
14.2
13.4
—
Johnson Control Gel
OFF
ON
ON
14.2
13.4
—
Ample Power Gel
ON
ON
ON
14.4
13.5
—
OPERATING THE ALTERNATOR/REGULATOR
The regulator is on whenever power is present at TB1–4 (B+). Without the ON/OFF output on TB1–2, the regula-
tor is simply controlling the parallel solenoid, and will close the solenoid whenever the voltage on TB1–8 indicates
that the main battery is being charged.
At Power-Up
When the regulator is first turned on, the red ERROR LED will glow for 5–8 seconds before extinguishing. Then
the green STATUS LED will start to flash status information, typically 2 seconds off, 1 second on (bulk charge).
If there is a positive voltage on TB1–2, ON/OFF, the alternator should start to charge after the ERROR LED goes
off. Charging can be controlled using the ON/OFF input.
Input Priority
The input signals are recognized in the following priority (the earlier listed input overrides all the inputs below it).
1.
EQL
2.
LIM
3.
ABS
4.
LOCK