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Installation
2–12
700-0035 R004
2.8. Step 7: Connecting the Speed Harness
The 3-conductor speed sensor harness shown in Figure 2-9 is for connecting to a
to an optional speed signal sensor or to a transmission control module (TCM).
Connecting to a Speed Signal Sensor
The wire colors for correct wiring to the
signals are described in Table 2-3. The green speed pulse signal is designed to
interface to speed sensors that output a pulse signal of up to 20 VDC, 20 VAC
p-p
or speed sensors that use open-collector style outputs. Contact Seon Design for
recommended speed sensors to use with the TR4 Plus DVR.
All of the wires in the speed sensor harness are protected against short circuits and
transients. Refer to the speed sensor product documentation for more information
on connecting to an external speed sensor.
Connecting to a Transmission Control Module (TCM)
The TR4 Plus DVR is
able to interface directly to some types of TCM in vehicles. Contact Seon Design
for more information about interfacing to different TCMs.
To connect the speed signal harness to the DVR:
1. Connect the speed harness connector into the
SPEED
connector on the DVR.
2. Push the cables into the cable retainers on the back of the DVR brackets and
slide the DVR into the lock box.
2.9. Step 8: Installing the GPS Receiver
If you have not purchased a GPS receiver or if you wish to install the GPS
receiver at a later time, please proceed to “Step 8: Hardware Installation Final
Checklist”.
Seon Design provides several models of GPS receivers designed to work with the
TR4 Plus DVR. Contact your sales representative at Seon Design for the GPS
receiver best suited for your application.
Figure 2-9
Speed harness
Table 2-4
Speed harness wiring
Wire Color
Signals
Black
Signal ground (0 V)
Green
Speed pulse signal
Red
Speed sensor power (7.5 VDC)
Important:
Do not pinch or bind any cables when sliding the DVR into the lock box.
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