Frequency Input; Table 3-21 Variable Reluctance Signal Interface - Detroit Diesel DDEC VI Application And Installation

The following criteria are to be used when designing the VIH.
Criteria: VIH Design
The four vehicle connectors are designed to accept 18 AWG wires for all circuits.
The conductor must be annealed copper, not aluminum, and must comply with the
industry standard SAE J1128 document.
Color code the wires as shown in the schematics. If the wires used are the same color,
hot stamp the cavity number on the wires.
NOTE:
The Vehicle Speed Sensor (VSS) must be a twisted pair. The twists are a minimum of 12
turns per foot (305 mm) and are required to minimize electromagnetic field coupling.
NOTE:
J1939 cable is required for the J1939 datalink wires. Refer to SAE J1939–11 spec
for specific requirements.
The low speed propriety Engine-CAN link between the MCM and the CPC must be a twisted
shielded cable with 0.75 mm diameter wire (approximately 20 AWG), bundle shielded with drain
wire and 30 twists per meter. The insulation is rated to 105°C. Termination resistors for the
Engine-CAN link are located in the CPC and MCM.

Frequency Input

The CPC has one frequency input on the VIH that can accept a variable reluctance sensor. A
typical frequency input functions is the Vehicle Speed Sensor (VSS). Requirements for a variable
reluctance signal interface are listed in Table 3-21.
Parameter
Input Amplitude Range
Input Frequency Range
Table 3-21 Variable Reluctance Signal Interface
All information subject to change without notice. (Rev. 01/07)
7SA827 0701 Copyright © 2007 DETROIT DIESEL CORPORATION
DDEC VI ELECTRONIC CONTROLS APPLICATION AND INSTALLATION
V Peak to Peak
0 to 10,000 Hz
Range
3-31