Honeywell TC-PPD011 | Battery Extension Module

Product Overview

This extension module provides additional battery capacity for Honeywell controllers requiring extended memory retention. Process facilities often need longer backup durations to protect configuration data during prolonged outages. The TC-PPD011 connects in parallel with the main controller battery assembly. Its dedicated circuitry prevents cross-discharge between connected battery packs. Maintenance teams can replace individual batteries without affecting the system’s operational state. The module’s compact design allows installation in tight cabinet spaces.

Technical Specifications

Parameter	Specification
Supported Battery Type	Lithium thionyl chloride (primary)
Nominal Voltage	3.6 VDC (per connected battery)
Maximum Connected Batteries	2 units in parallel
Total Additional Capacity	Up to 5000 mAh (with two batteries)
Reverse Current Protection	Active blocking diodes
Standby Current Draw	≤2 µA (from battery)
Connection Interface	2-pin polarized headers (input and output)
Internal Wiring Resistance	<0.1 ohm per path
Operating Temperature	–40°C to +85°C
Storage Temperature	–40°C to +85°C
Dimensions (W x H x D)	38 mm x 25 mm x 60 mm
Weight	0.06 kg (without batteries)
Mounting Type	PCB mount with snap-in clips
Material	High-temperature thermoplastic (UL 94 V-0)

Parallel Connection and Load Sharing

The TC-PPD011 enables seamless parallel connection of up to two additional battery assemblies. This module actively isolates each connected battery to prevent current backflow. Its low forward voltage drop ensures minimal energy loss during discharge events. The internal bus architecture distributes load current evenly among all attached units. Each battery path includes independent fuse protection for fault tolerance.

Energy Storage Enhancement

This extension module effectively triples the total available backup energy when using two additional batteries. A standard system with one controller battery and two extension modules stores over 7,800 mAh of capacity. The extension supports continuous discharge currents up to 130 mA from the combined pack. Users can calculate backup duration based on their controller’s specific current draw. The module adds no significant self-discharge to the overall battery system.

Installation and Wiring Configuration

A 2-pin input header accepts the main controller battery’s cable connection. A second 2-pin output header provides pass-through connectivity to additional extension modules. The module’s snap-in clips secure it firmly to the controller PCB without hardware. Its lightweight 60-gram construction imposes minimal mechanical stress on circuit boards. Color-coded headers prevent reverse insertion during field installation procedures.

Protection Circuitry and Isolation

Active diode isolation prevents the stronger battery from discharging the weaker one. Fault-tolerant design allows individual battery removal while others continue supplying power. Short-circuit protection limits fault current to safe levels for semiconductor devices. The module’s high-temperature thermoplastic housing withstands soldering temperatures during assembly.