Can−Bus Termination Resistors; Hour Meter - Toro Reelmaster 3550-D Service Manual

CAN−bus Termination Resistors
System communication between electrical components
on Reelmaster machines is accomplished on a CAN−
bus communication system. Two (2) specially designed,
twisted cables form the bus for the network used on the
machine. These wires provide the data pathways
between machine components. At the ends of the twis-
ted pair of bus cables are two (2) 120 ohm termination
resistors.
The resistors plug into the wire harness under the con-
trol panel. The resistors can be accessed by removing
the cover from the control panel (see Electrical Schem-
atics and Wire Harness Drawings in Chapter 10 − Fol-
dout Drawings in this manual for additional information).
The termination resistor and the wire harness connector
have blue inserts to identify the proper location for the
termination resistor.
IMPORTANT: The termination resistors are re-
quired for proper electrical system operation.
Testing
The termination resistors (Fig. 56) can be tested using
a digital multimeter (ohms setting). There should be 120
ohms resistance between terminals A and B of the ter-
mination resistor. Terminal C is not used.

Hour Meter

The hour meter is located on the control panel. The hour
meter (Fig. 57) indicates the total hours of machine op-
eration. The hour meter starts to function whenever the
key switch is in the ON position.
1. Connect the positive (+) terminal of a 12 VDC source
to the positive terminal of the hour meter.
2. Connect the negative (−) terminal of the voltage
source to the other terminal of the hour meter.
3. The hour meter should move 1/10 of an hour in six
minutes.
4. Disconnect the voltage source from the hour meter.
Electrical System
Termination
Resistor
Page 5 − 48
B
C
Figure 56
Hobbs
QUARTZ
1
0 0 0 0 1
10
HOURS
+
BACK
Figure 57
Reelmaster 3550−D/3555−D/3575−D
A