User's Manual

DRAFT TrimTrac 1.5 Technical Manual v0.3ab 165
Figure 9, Vehicle Adapter Module Alert Wiring Diagram
Notes:
• High and Low Priority switches must be Normally Open; Medium Priority switch must be Normally Closed
• HPA and MPA Switches can be either Momentary or Latching, LPA switch must latching-type
• High, Low and Medium Switches are optional and can be used in any combination
• Multiple switches can be used in parallel in each branch circuit; provided, however that branch resistance
values are maintained as shown.
• End-of-Line Resistor is required unless MPA Mode is set “1=Disabled”
• If Alert Switches are not used, then set HPA, MPA and LPA Modes all to “1=Disabled”
• Set MPA Mode to “1=Disabled” if you do not want a MPA message if no external VDC is available.
• All resistors (+/- 5%, .250 Watt min.) and switches provided by installer.
• Opens, shorts and ground faults on main circuit and loss of external VDC handled as “Medium Priority Alerts”
• New High and Low Priority alerts may not be recognized if a Medium Priority alert caused by an open, short or
ground fault is in already in effect.
TrimTrac Vehicle
Adapter Module
9-32 VDC
Positive (+)
Negative (-)
Re
d
Blac
Medium
Priority
Switch
(NC)
End-of-Line
Resistor
100k Ohm
Low
Priority
Switch
(NO)
LPA Resistor
37.4k Ohm
Yellow
High
Priority
Switch
(NO)
HPA Resistor
4.7k Ohm
Yellow