1. Introduction
The VOTRONIC PB 1260 SMT 3B is a high-quality 12V battery charger designed for various battery types, including lead-acid, gel, AGM, and LiFePO4 batteries. This device features an integrated charge current distributor, making it suitable for charging and maintaining multiple batteries in vehicles, such as motorhomes or boats. It ensures efficient and safe charging with advanced protection features.
2. Safety Instructions
- Read this manual completely before installation and operation.
- Installation and maintenance should only be performed by qualified personnel.
- Ensure correct voltage and polarity connections to prevent damage to the charger and batteries.
- Provide adequate ventilation around the charger to prevent overheating.
- Avoid short circuits at all times.
- Important Note for LiFePO4 Batteries: For safety reasons, the device only operates with LiFePO4 batteries when a temperature sensor is connected. Screw the temperature sensor to the negative pole of the battery.
3. Setup and Installation
3.1. Connection Diagram
Figure 1: Illustrative wiring diagram for VOTRONIC PB series chargers. Note that the model shown in the diagram is Pb 1220 SMT 2B, but the connection principles apply to the Pb 1260 SMT 3B.
This diagram illustrates the typical connections for the VOTRONIC PB series charger. Key connections include:
- Main Battery (Hauptbatterie): Connect the main 12V battery to the designated terminals. Ensure correct polarity (+ and -). Recommended cable cross-section: red 2.5-10 mm², black 2.5-10 mm².
- Starter Battery (Startbatterie - Option): An optional connection for a 12V starter battery. Recommended cable cross-section: red 1.5-2.5 mm².
- Chassis (Karosserie): Connect the negative terminals of both batteries and the charger to the vehicle chassis for grounding.
- Remote Control (Anschluss für Fernbedienung): Connect an optional remote control unit here.
- Temperature Sensor (Temperatur-Sensor): Mount the temperature sensor on the negative pole of the main battery. This is crucial for LiFePO4 batteries and optimizes charging for lead-acid batteries.
Cable Preparation: Strip cable ends by 10 mm before connecting them to the terminals.
Vibration Damping: Do not remove the rubber grommets, as they are essential for vibration damping.
Fuses: Connect fuses as directly as possible to the batteries for cable protection. Fuse 1 (for Main Battery) should be 25-40 A. Fuse 2 (for Starter Battery) should be 15 A.
3.2. Battery Type Selection
The charger features a switch to set the battery type for Main Battery I. The switch levers are typically shown in white on the device. Select the appropriate program based on your battery type:
- Lead Acid / AGM 1 (14.4V): For standard lead-acid and AGM batteries.
- Gel (14.4V): For sealed, gas-tight gel/dryfit batteries.
- AGM 2 (14.7V): For specific AGM (Absorbent-Glass-Mat) batteries requiring a higher charging voltage.
- LiFePO4 (14.4V): For lithium-LiFePO4 batteries with an integrated or external Battery Management System (BMS).
4. Operating Instructions
4.1. Charging Programs Overview
The charger offers optimized charging programs for different battery chemistries:
- Gel Program (IU1oU2oU3): Tailored for sealed, gas-tight gel/dryfit batteries. This program provides a higher charging voltage level and longer U1 hold times to ensure short charging times, high capacity storage, and prevent long-term battery
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