Model 5200 High-Level Orderpicker
Section 8. Theory of Operation Pinout Matrix
Pinout Matrix
b. Identifies possible causes for lack of correct signal.
Section 8. Theory of Operation
The pinout matrix chart lists functions and normal voltages of terminals and harness connector pins. The matrix columns have the following meanings: 1. Item #: sequential number to aid in reference. 2. Connection: the actual wire numbers or component abbreviations on the electrical schematic. 3. Function Description: brief definition of the signal carried on the wire.
5. Normal Level: the approximate voltage that should be seen on that wire for the state indicated. Unless otherwise indicated, voltages are measured with respect to (wrt) B– at TP4. 6. Signal Source: the device or connection that supplies the signal directly to the wire. 7. Signal User: the device or connection that the wire directly delivers the signal.
4. Theory of Operation: a. A detailed description of the signal carried on the wire. If the signal can be variable, it indicates the state of a related component that causes the signal to vary.
Item #
Connection
Function Description
1
PS1-3
DGND
Battery negative for the control circuitry on the steer power head. It comes from the STM.
<0.5VDC wrt TP4 (B–)
STM
Steer Power Head
2
PS1-8
12VP
Supplies working voltage to the steer power head when B+KEY is present on the STM. If not present, the steer power head does not function and code 3,2 is displayed during SelfTest. Check voltage at (+12VF) on the STM.
Key switch closed = +10.8 - 13VDC
STM
Steer Power Head
3
PS1-9
AGND
Battery negative for the control circuitry on the steer power head. It comes from the STM.
<0.5VDC wrt TP4 (B–)
STM
Steer Power Head
4
PS1-1
STEER DIR1
Input from the STM to turn on the circuitry in one half of the steer transistor circuit for steering right.
No steering = 5V steering right = 0V
STM
Steer Power Head
5
PS1-10
STEER DIR2
Input from the STM to turn on the circuitry in one half of the steer transistor circuit for steering left.
No steering = 5V steering left = 0V
STM
Steer Power Head
6
PS1-6
STEER DIR1 PWM
Input from the STM to PWM the circuitry in one half of the steer transistor circuit for steering left.
No steering = 0V steering fast left = 4.6V
STM
Steer Power Head
7
PS1-15
STEER DIR2 PWM
Input from the STM to PWM the circuitry in one half of the steer transistor circuit for steering right.
No steering = 0V steering fast right = 4.6V
STM
Steer Power Head
Theory of Operation
Publication Number: 1043922B, Revised: 2 Sept 2015
Normal Level
Signal Source
SignalUser
8-17
