TeeJet Legacy 6000 CAN Guide - Manual (Page 16)

1-6 Chapter 1 - System Introduction
Mid-Tech CAN Bus System Overview
Fieldware for The Legacy 6000
Software Version 2.11
Power Speed Module
The Power Speed Module (PSM) is the primary arbitrator of the Bus. This module includes the
input point for the speed sensor, the input for power for the CAN bus, a gateway to communicate
with a parallel CAN bus and provides a fully functional RS-232 port as alternative I/O.
Inputs
Speed 1: digital, 0-12 VDC, optimized for 50% duty cycle, 0-5 KHz, primary input
Speed 2: digital, 0-12 VDC, optimized for 50% duty cycle, 0-5 KHz, secondary input
Ignition sense: digital, 0-16 VDC, (Hi state is ON)
Battery Power: 0-16 VDC
Inputs/Outputs
Mid-Tech CAN: ISO 11898 (Bosch 2.0B), 29 bit ID, 250K baud, Mid-Tech proprietary messages
Gateway CAN: ISO 11898 (Bosch 2.0B), 29 bit ID, 250K baud, Mid-Tech proprietary messages
Serial RS 232: TXD, RXD, RTS, CTS and ground.
Figure 1-1: Power Speed Module