4.4 - Measured Voltage At I/O Board; Table 4-3: I/O Board Voltage - Upright TM12 Service & Parts Manual

Troubleshooting
4.4 M
EASURED
Page 4-6
V I/O B
OLTAGE AT

Table 4-3: I/O Board Voltage

DESCRIPTION
1
2
3
4
5
6 24 Volts Out to Interlock Lever when Upper Controls Selected & Upper/Lower E-Stops Not Depressed
7
8
9
10
11
12
1 Goes to 0 Volts to Activate Depression Mechanism Extend Solenoid / 24 Volts = Solenoid OFF
2
3
4
5
6
7
8
1
2
3 24 Volt Supply for Alarm, Tilt Sensor, Lift Down and Depression Mechanism Retract Solenoids
4
5
6 Goes to 0 Volts to Activate Depression Mechanism Solenoid / 24 Volts = Solenoid OFF
7
8
1
2
3
4
5
6
7
8
9
10
11
12
1
2
3
4
5
6
7 24 Volts = No Direction Solenoid Allowed / 0 Volts = Direction Solenoid Allowed to Activate
8
OARD
24 Volts = Lift Mode Active / 0 Volts = Lift Mode inactive
No Connection
24 Volts = Drive Allowed / 0 Volts = Drive Not Allowed
24 Volts from Lower E-Stop / Lower E-Stop Not Depressed
24 Volts from Upper E-Stop / Lower and Upper E-Stops Not Depressed
No Connection
24 Volts = Drive Forward or Lift Up / 0 Volts = Stop Drive Forward or Lift Up
24 Volts = Drive Reverse or Lift Down / 0 Volts = Stop Reverse Drive or Lift Down
Accelerator Input / 20K Pot / 3.5 Volts to 0 Volts, Minimum to Maximum Speed
24 Volts = Steer Left / 0 Volts = Stop Steer Left
24 Volts = Steer Right / 0 Volts = Stop Steer Right.
No Connection
24 Volt Supply for Solenoids
Goes to 0 Volts to Activate Forward Solenoid / 24 Volts = Solenoid OFF
Goes to 0 Volts to Activate Reverse Solenoid / 24 Volts = Solenoid OFF
Goes to 0 Volts to Activate Lift Up Solenoid / 24 Volts = Solenoid OFF
Goes to 0 Volts to Activate Steer Left Solenoid / 24 Volts = Solenoid OFF
Goes to 0 Volts to Activate Steer Right Solenoid / 24 Volts = Solenoid OFF
Goes to 0 Volts to Activate Alarm / 24 Volts = Alarm OFF
24 Volts = Tilt Inactive / 0 Volts = Tilt Active
24 Volts = Below Height Limit / 0 Volts = Above Height Limit
Goes to 0 Volts to Activate Lift Down Solenoid / 24 Volts = Solenoid OFF
24 Volts = High Speed Active / 0 Volts = Low Speed Active
Battery Negative Supply for Tilt Sensor
Goes to 0 Volts to Activate Line Contactor / 24 Volts = Line Contactor OFF
Supplies 24 Volts to Upper Control / Lower Control Switch
24 Volts = Lower Control Mode
Supplies 24 Volts to Ground Lift Switch when in Lower Control Mode
24 Volt Supply Output
Goes to 0 Volts to Activate Hour Meter / 24 Volts = Hour Meter Not Activated
24 Volts = Lift Up from Ground Control / 0 Volts = Lift Up OFF
24 Volts = Lift Down from Ground Control / 0 Volts = Lift Down OFF
24 Volt Supply Input from Battery via Lower E-Stop / Lower E-Stop Not Depressed
24 Volts from Upper Control Switch / 24 Volts = Upper Control Mode
Battery Negative Input to I/O Board
24 Volt Supply for Hour Meter and Line Contactor
24 Volts power to Pin 1 of SC1000 (Key ON Power)
24 Volts = Command Controller to Drive / 0 Volts = Stop Controller Drive
24 Volts = Command Controller to Steer / 0 Volts = Steer OFF
24 Volts = Command Controller to Lift / 0 Volts = Stop Lift
24 Volts = Command Normal Speed / 0 Volts = Command Speed Cutback
24 Volts = Line Contactor OFF / 0 Volts = Line Contactor ON
Accelerator 3.5 Volts to 0 Volts / Minimum to Maximum Speed

4.4 - Measured Voltage at I/O Board

TM12 Work Platform - European