IO 12 Expander- 12 Channel (CAN ID – Box B)

Advanced Network Expansion: IO 12 Expander (CAN ID – Box B)

The IO 12 Expander- 12 Channel is a powerful digital gateway designed to multiply the input and output capabilities of your engine management system via the CAN Bus network. Assigned the unique CAN ID – Box B, this module acts as a discrete node on the vehicle’s data backbone, providing 12 additional channels for advanced control and telemetry. It is the definitive solution for high-level standalone ECU integration on RB26, 2JZ, and LS-swap builds where the primary ECU’s physical pins are fully occupied by ignition and injection duties.

Engineering Principles: CAN Topology and I/O Density

This expander converts mechanical and electrical inputs into high-speed CAN packets. It provides 4 Digital Pulsed Outputs (DPO), 4 Digital Pulsed Inputs (DPI), and 4 Analogue Voltage Inputs (AVI). This Analogue-to-Digital interface allows the ECU to process up to 12 new parameters—such as secondary widebands, steering angle sensors, or fuel pressure sensors—without needing extra wires through the firewall. The “Box B” identifier is a calculated engineering detail; it allows the user to combine two IO 12 Expanders (one Box A and one Box B) on a single CAN bus to add a massive 24 channels of I/O, providing the bandwidth required for professional-level detonation protection and data acquisition.

Operational Benefits for Pro-Tuner Integration

For the professional tuner, the IO 12 Expander unlocks the ability to implement complex control loops like closed-loop boost control using multiple pressure sources, or automated safety strategies for nitrous and water/methanol injection. In a fuel map calibration scenario, the AVI channels are foundational for logging auxiliary parameters that influence volumetric efficiency. The DPO channels can be used to drive indicator lights, solenoids, or small motors, offloading these low-priority tasks from the main ECU to ensure the highest processing speed for timing and injection events. It is a vital component for builds utilizing an iC-7 Digital Display to monitor a comprehensive sensor suite.

Plug ‘n’ Play Integration and Compatibility

The IO 12 Expander is designed for seamless harness integration. As supplied, it is Plug ‘n’ Play compatible with an Elite ECU CAN port and included an Elite CAN cable (300mm). It is also compatible with Haltech’s Nexus series and multiple-device installations using a 4-port CAN HUB. For users of Platinum PRO or Sport series ECUs, a Haltech CAN Cable (8-pin Black Tyco) should be ordered. The module is housed in a robust, weatherproof aluminum casing, ensuring reliable operation in harsh motorsport environments. This expander is the industry standard for professional-grade ECU resource management.

Technical Specifications Table

Summary & Includes

The IO 12 Expander (Box B) is the definitive tool for expanding ECU I/O via CAN. Includes: 1 x IO 12 Expander and 1 x DTM-4 to 8-pin Tyco CAN Cable. Note: Use in conjunction with a Box A module for up to 24 additional channels of sensor and output control.