SI-ACR Automatic Charging Relay - 12/24V DC 120A

Blue Sea Systems

SKU

Automatically combines batteries during charging, isolates batteries when discharging and when starting engines

Features

Protects sensitive electronics by temporary isolation of house loads from engine circuit during engine cranking
Designed for 12 or 24 volt systems
12/24 volt auto-ranging voltage input
Hermetically sealed contacts/vapor proof
Ignition protected—safe for installation aboard gasoline powered boats
Supports high-output alternators up to 120 Amperes
Dual sensing

Optional Features

Start Isolation allows temporary isolation of House loads from Engine circuit during engine cranking to protect sensitive electronics from sags and spikes
Remote LED remotely indicates ACR states - requires optional LED

As low as £127.08

Details

Downloads

Specifications
Nominal Voltage	12V DC 24V DC
Start Isolation*	Yes
Amperage Operating Current	175mA (combined) 15mA (open)
Terminal Stud Torque	140 in-lb (15.82 Nm)
Continuous Rating**	120A
Intermittent Rating***	210A (5 min)
Cable Size to Meet Ratings	1/0 AWG
Stud Material	Tinned Copper
Terminal Ring Diameter Clearance	1.12in (28.45 mm)
Terminal Stud Length	0.875in (22.23 mm)
Terminal Stud Size	3/8" - 16 (M10)
Relay Contact Position
Combine 30 sec	13.6V @ 12 V 27.2V @ 24 V
Combine 90 sec	13.0V @ 12 V 26.0V @ 24 V
Open 10 sec	12.35V @ 12 V 24.7V @ 24 V
Open 30 sec	12.75V @ 12 V 25.5V @ 24 V
Open High	16.0V @ 12 V 30.0V @ 24 V
Over Voltage Lockout	16.0V @ 12V 32.0V @ 24V
Under Voltage Lockout****	9.5V @ 12 V 19V @ 24 V
Weight	1.25lb (0.57 kg)

*Condition: Engine starting

Relay is open isolating batteries
Batteries are isolated to protect sensitive electronics from voltage sags and spikes

**The maximum current a switch is designed to conduct for an indefinite period.

***The maximum amount of current a switch is designed to carry for a minimum of a designated period of time.

****As a safety feature, some ACRs prevent combining into a severely discharge battery. A dual-sensing ACR will monitor the voltage on both batteries and will not connect if either battery is below the undervoltage lockout level. Use caution when combining into a battery with extremely low voltage, because this might represent a faulty battery or a problem elsewhere in the system.