Section 8. Theory of Operation Model 8210/8250 Maintenance Manual
Pinout Matrix
8-10 Publication: 1146945/001, Revised: 25 Sep 2018
5 JP1-3 Horn The TA sends B– to activate the horn. Activated:
0VDC
Deactivated:
24VDC
TA Horn
6 JP1-4 Pump Contactor The TA sends B– to activate the LPC (Lift
Pump Contactor) coil.
Activated: 0V
Deactivated:
24V
TA LPC
Contactor
7 JP1-5 Brake The TA sends B– to activate the Brake. Activated:
0VDC
Deactivated:
24VDC
TA Brake
8 JP1-6 Main Contactor The TA sends B– to activate the MPC (Main
Power Contactor).
Activated:
0VDC
Deactivated:
24VDC
TA MPC
Contactor
9 JP1-7 I/O GND B– for Traction Motor Encoder (TME) and
it’s shield and the Traction Motor
Temperature Sensor (TMT).
< 0.5 VDC
with respect
to B–
TA TME, TMT
10 JP1-8 Motor Temp Analog voltage that varies with the traction
motor temperature. used by the TA to
adjust motor performance when a motor
over-temperature condition exists.
75°F or
24°C:
Approx.
2VDC
Traction
Motor
Temp
Sensor
TA
11 JP1-9 Brake Switch Monitored by the TA to activate the MPC
(Main Power Contactor). Open between 0
and 10 degrees from vertical or
horizontal. The brake (deadman) switch
acts to protect against travel while the
brake is applied. The handle must be
between 10 degrees horizontal and
vertical in order for the brake (deadman)
to be closed, permitting travel.
Switch ON:
12VDC
Switch OFF:
0VDC
SW2 TA
12 JP1-13 B+ Supply Supplies B+ from the TA through SPL3 to
Brake, LPC, MPC, SOL-1, SOL-2 (Model
6210 only), and Horn.
24VDC TA Brake, LPC,
MPC,
SOL-1,
SOL-2
(Model
6210 only),
and Horn
13 JP1-19 Travel Alarm The TA sends B– to activate the optional
Travel Alarm.
Activated:
0VDC
Deactivated:
24VDC
TA Travel
Alarm
14 JP1-20 Load Hold
Valve
The TA sends B– to SOL1 to activate the
Load Holding Solenoid when lower is
requested.
Deactivated:
26VDC
Activated:
0VDC
TA SOL1
Item Connection
Functional
Description
Theory of Operations
Normal
Level
Voltage
Source
Voltage
User
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