Haltech HT059900 - Manual (Page 9)

Installation
Installing the Haltech I/O Expander 12 is quick and simple there are 2 possible
methods for connection to your Haltech ECU, they are outlined below:
Method 1: Direct Connection to Haltech Platinum Series ECU
• Connect the Haltech I/O Expander 12 directly to a Haltech Platinum series ECU via
the CAN direct connection cable included with the kit
Figure 1 - Direct connection to Haltech ECU
Method 2 : Connection Via Haltech CAN Hub ( HT059990)
• Connect the Haltech I/O Expander 12 directly to the CAN Hub attached to a Haltech
Platinum Series ECU ( a Haltech CAN Hub Connection Cable may need to be
purchased depending on your setup. Please refer to the Haltech CAN Hub quick start
guide for details on connecting multiple devices to your Platinum Series ECU.)
Figure 2 - CAN Hub connection to Haltech ECU with 2 Devices
Digital Pulsed Inputs ( DPI )
The Haltech I/O Expander 12 features 4 Digital Pulsed Inputs. Each input has been
grouped with a +12V DC Source and a signal ground within the harness, this allows
the user to fit an external pull-up to 12V or pull- down to ground resistor if required
and or to supply power to a 12V rated sensor.
Digital Pulsed Inputs are capable of accepting pulsed input information such as
for a road speed sensor. These inputs measure the time periods between the pulses
and can process this information to provide quantities such as road speed.
Figure 9 - Digital Pulsed Inputs
Figure 10 - Haltech HT1010608 wiring to DPI 1