Trimble Inc. WCSNM941 Benutzerhandbuch
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SNM941 Wiring Harness
SNM941 Connected Site Gateway Installation Guide |
29
Telematics installation wires configuration
The following table describes the conductors in the electrical harness:
The following table describes the conductors in the 6-pin Deutsch connector on the electrical harness:
Conductor
ID
Conductor
Pin
Number*
Number*
Signal
description
description
Connection
A
5
Key Switch
Input
Input
An electrical accessory circuit that becomes active
when the asset’s key switch is moved to the “accessory”
and “run” positions.
when the asset’s key switch is moved to the “accessory”
and “run” positions.
Required to initialize the SNM941 as soon as an operator
activates an asset.
activates an asset.
NOTE –
If this connection is not made, the device will
shut off after 10 minutes of run time.
B
19
Battery
+
Input
Positive terminal on battery. Terminal with the highest
voltage in multi-battery configurations.
voltage in multi-battery configurations.
Required to provide continuous power to the SNM941.
C
1
Battery
-
Input
Negative terminal on battery. Terminal that connects to
chassis ground in multi-battery configurations.
chassis ground in multi-battery configurations.
Required to provide continuous power to the SNM941.
E
3
Chassis
Ground
Ground
Reliable connection to asset’s conductive chassis.
Required to detect open negative master disconnect.
Required EMI connection to asset’s conductive chassis.
Failure to make this connection could cause erratic
behavior on the device.
Failure to make this connection could cause erratic
behavior on the device.
Conductor
ID
Conductor
Pin
Number*
Number*
Signal
description
description
Wire
color
color
Connection
D
23
R-Terminal
Input
Input
White
The relay terminal on the engine’s
alternator or a signal such as an oil
pressure switch that provides a signal of
85% of system voltage or greater.
alternator or a signal such as an oil
pressure switch that provides a signal of
85% of system voltage or greater.
.
F
7
Digital Input 1
Brown
Optional – A sensor that provides a ground
signal when a monitored situation occurs. If
not used connect to ground or let float. This
can be an open circuit or short circuit to
ground, i.e. when the monitored state
occurs, the signal should be ground.
signal when a monitored situation occurs. If
not used connect to ground or let float. This
can be an open circuit or short circuit to
ground, i.e. when the monitored state
occurs, the signal should be ground.
Installation Guide.
DRAFT