CTEK D250S Dual Instruction Manual

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DEFINITIONS CONSUMERS
Depending on the application, it could also
be referred to as
- Electrical equipment +
CONNECTIONS
- Electrical equipment
+IN +OUT
+OUT
SMARTPASS12V
Temperature sensor L:2m
Negative cable connection M8
L:0.3m
Consumers +
Alternator battery + Service battery +
SMARTPASS
SMARTPASS can operate as a stand-alone unit, but works best in combination with D250S
DUAL. The SMARTPASS creates a priority path for charging the Service battery to recharge
it more quickly and efficiently. Attached energy sources like solar, wind or shore power will
charge both the Service and the Starter batteries through the SMARTPASS. Service batteries
that are overheated due to age, high ambient temperature or other battery problems will be
protected from high alternator current.
SMARTPASS
FEATURES:
The CTEK SMARTPASS adds additional functionality for higher output alternators, larger battery
banks and/or high parallel loads.
• Separation of consumers and Service batteries during charging, which improves the charging
capacity significantly, and lowers the consumer voltage, which increases expected service life of
lights and other electronics.
• Service battery watch, which avoids harmful deep discharges that otherwise would shorten
battery life. The battery watch also protects navigation, radio and emergency light from being out
of electricity.
• Over-temperature protection of Service battery. High battery temperature could significantly
reduce battery life.
•Maintenance charge of Starter battery, which simplifies installation with fewer components.
• Simplified installation of AC/DC chargers (shore power). Only one output from the AC/DC
charger needed.
DEFINITIONS ALTERNATOR BATTERY
Depending on the application, it could also
be referred to as
- Starter battery
CONNECTIONS
- Trailer coupling
- Solar panel
- Wind power
- Alternator
- D250S DUAL Alternator battery +
DEFINITIONS SERVICE BATTERY
Depending on the application, it could also
be referred to as
- House battery
- Domestic battery
- Consumer battery
CONNECTIONS
- Electrical equipment
- Battery bank
- D250S DUAL Service battery +
SMARTPASS LAMPS
+IN +OUT
+OUT
SMARTPASS12V
2
3
1
4
The CTEK SMARTPASS is designed to work together with 1-2 CTEK D250S DUAL, but can also be
used alone.
Error lamp
Power lamp
1. Service battery charging lamp
2. Alternator battery consumption
lamp
3. Alternator battery charging
lamp
4. Service battery consumption
lamp
20015686F D250S Dual + SmartPass, Manual, Print file 001.indd 5 2011-12-20 11:19:32

CTEK D250S Dual Specifications

General

Charging Current	20 A
Operating Temperature	-20°C to +50°C
Protection Class	IP65
Battery Capacity	40–300 Ah
Battery Types	Lead-acid (Wet, MF, AGM, GEL)
Protection Features	Reverse polarity protection, over temperature protection
Input Voltage	11.5-23V, DC
Charging Stages	5-stage, Automatic