Section 8. Theory of Operation Pinout Matrix Item
Connection
Model 4700 Maintenance Manual Single Traction Motor Trucks >S/N 10676
Function Description
Theory of Operation
Normal Level
Signal Source
Signal User
331
PPA (V)
PPA (V)
One of three phases from the PPA to the Pump Motor. Voltage is measured between any two phases. If not present, check the PPA, wiring, and connections.
0 to approx. 20VAC; approx. 200A ramping; approx. 250A full lift
PPA
PM
332
PPA (W)
PPA (W)
One of three phases from the PPA to the Pump Motor. Voltage is measured between any two phases. If not present, check the PPA, wiring, and connections.
0 to approx. 20VAC; approx. 200A ramping; approx. 250A full lift
PPA
PM
333
TPA B+
B+
B+ from the battery to the TPA through fuse FT. If not present, make sure the battery is connected. Check fuse, wiring, and connections.
B+
J1+
TPA
334
TPA B–
B–
B– from the battery to the TPA. If not present, make sure the battery is connected. Check the wiring and connections.
Battery voltage wrt BT1+
BT1
TPA
335
TPA (U)
TPA (U)
One of three phases from the TPA to the Traction Motor. Voltage is measured between any two phases. If not present, check the TPA, wiring, and connections.
0 to approx. 20VAC; approx. 50A ramping; approx. 35A full speed on jack
TPA
Traction Motor
336
TPA (V)
TPA (V)
One of three phases from the TPA to the Traction Motor. Voltage is measured between any two phases. If not present, check the TPA, wiring, and connections.
0 to approx. 20VAC; approx. 50A ramping; approx. 35A full speed on jack
TPA
Traction Motor
337
TPA (W)
TPA (W)
One of three phases from the TPA to the Traction Motor. Voltage is measured between any two phases. If not present, check the TPA, wiring, and connections.
0 to approx. 20VAC; approx. 50A ramping; approx. 35A full speed on jack
TPA
Traction Motor
8-76
Publication 1160093, Issued: 20 May 2013
