Blue Sea Systems PN9112 Manually Connect and Disconnect Battery Banks, Operation

Installation Instructions (continued)

Manually Connect and Disconnect Battery Banks

A control switch such as a Blue Sea System’s Switch Panel 8270 or Contura Switch 8232/8283 may be used to manually connect and disconnect battery banks by overriding the L-Series ACR voltage sensing circuit.

To connect a manual override switch:

•Connect Control Line (orange) to the center common terminal of an ON-OFF-ON single pole, double throw switch.

•Connect negative and positive to the outside terminals of the switch.

•When the control line is switched to a positive supply, the relay is closed when ever the voltage is greater than about 9 volts at either terminal.

•When the control line is switched to the negative supply line, the relay will be held open.

•When the switch is in the center position, with no command to the relay, the relay will operate automatically to close and open when it senses charging voltages. The control signal passes very little current and can be supplied from any fused positive source.

Remote Indicator Lamp

To determine at a remote location when the battery banks are connected, a remote LED indicator can be connected to the L-Series ACR. Suitable indicator lamps are Blue Sea Systems PN 8033 (amber), PN 8171 (red), or PN 8172 (green).

To connect an LED indicator:

•Connect the red wire of the LED to a positive source.

•Connect the yellow wire of the LED to the Status Line (blue).

Lug Installation Diagram

Operation

Operation

When all wiring is complete and has been checked, restore battery connections. The relay may momentarily energize when power is first applied. The automatic charging circuit has a 30 second time delay to reduce cycling caused by noise in the system.

Open/Close Cycling

If your electrical system is configured with a charging source that cannot supply the full load current being drawn from the receiving battery, a cycling process can occur. With the ACR open and the charging source supplying the first battery bank, its voltage will rise until the ACR senses sufficient to indicate charging and combine the two battery banks. If the second battery bank is supplying loads that are drawing greater current than the capacity of the charging source, the voltage will drop because there is a net discharge on the system. The ACR will respond to the low voltage and open, disconnecting the second battery bank and its load.

	Control	PN 9112	Starting Battery	House Battery
	Line	Contacts	Voltage Sense	Voltage Sense
Relay ON (Manual)	>9V	Closed	>9	Anything
	>9V	Closed	Anything	>9
Relay Pickup	Open	Open	<13.6,	<13.6,
			15 to 27.2,>30	15 to 27.2,>30
(Auto)
	Open	Closed	13.6 to 15,	<Starting Battery
Conditions to turn			27.2 to 30
				13.6 to 15,
relay on	Open	Closed	< House Battery
				27.2 to 30
Relay Dropout	Open	Closed	12.6 to 15,	12.6 to 15,
(Auto)			25.2 to 30	25.2 to 30
Conditions to turn	Open	Open	<12.6,	<12.6,
relay off			15 to 25.2, >30	15 to 25.2, >30
Relay Off (Manual)	<1V	Open	Anything	Anything
	Anything	Open	<6	<6

Wire Sizing Chart

Use the wire sizing chart below to determine minimum wire sizes open to free air circulation.

10	60.0	51.0
8	80.0	68.0
6	120.0	102.0
4	160.0	136.0
2	210.0	178.5
1	245.0	208.3
0	285.0	242.3
00	330.0	280.5
000	385.0	327.3
0000	445.0	378.3

Note: For wire with 105°C insulation rating, no more than 2 conductors are bundled, and not enclosed in conduit or other extra insulation.

Not suitable for sizing flexible shore power cords.

Wiring Identification

The voltage will again rise as the first battery bank recovers and the ACR will close again after a delay. If this open/close cycling continues, the second battery bank could eventually discharge even though a charge source is present.

Performance Specifications	Units	Min	Nom	Max
AUTOMATIC MODE@25C
Pickup Voltage (PU1)	V DC	13.5	13.6	13.7
Drop-out Voltage (DO1)	V DC	12.5	12.6	12.7
Over Voltage (OV1)	V DC	14.8	15	15.2
Pickup Voltage (PU2)	V DC	27.0	27.2	27.4
Drop-out Voltage (DO2)	V DC	25.0	25.2	25.4
Over Voltage (OV2)	V DC	29.6	30	30.4
Over Voltage Hysteresis	V DC		.35
Coil
Inrush Current	A	1.5	2.8	3.5
Inrush Time	s	.80	.100	0.13
Hold Current, Ave	A	.03	.110	.160
PWM Frequency	kHz		20
Time Delay on Close	s	25	30	35
MANUAL MODE
Maximum Input Voltage	V DC	-	-	36
Pickup Voltage	V DC	8	8.5	9
Drop-out Voltage	V DC	6	6.5	7
Current Draw When Contactor is “Off”	mA	.05	1	2
Status Line
(Open Collector with 1k Limiting Resistor)
Voltage, Maximum	V DC	-	-	36
Current, Maximum	mA	-	-	36

Table of Operation