ELECTRIC SYSTEM 2250 SERVICE/MAINTENANCE MANUAL
3-36
Published 11-06-15, Control # 040-13
MAX-ER Controller Description ID
Description Pin Wire
Test Voltage
(DC unless otherwise specified)
Board
(Signal
Type)
10 Volt Regulated Supply A-01 87FM 10 Volts
Counterweight Level Sensor A-22 99B 5 Volts at 0°; 0.5 Volts Change Per 1° (AI)
Counterweight Lower Pendant Cylinder
Extend
A-07 89K4 12 Volts Nominal (AI)
Counterweight Raise Pendant Cylinder
Retract
A-06 89J4 12 Volts Nominal (AI)
Drum 9 Brake C-16 88E 12 Volts Nominal (DO)
Drum 9 Flange Encoder CHA D-01 88MA
7.5 or 0 Volts Not Moving; 3.5 Volts
Moving
CH-A
Drum 9 Flange Encoder CHB D-02 88MB
7.5 or 0 Volts Not Moving; 3.5 Volts
Moving
CH-B
Drum 9 Left and Right Motor Control C-05 88MC -5 volts to 5 volts (DO)
Drum 9 Minimum Bail Limit Switch A-04 89G4 12 Volts Nominal (AI)
Drum 9 Pawl In Relay C-17 88C 12 Volts Nominal (DO)
Drum 9 Pawl Out Relay C-18 88CA 12 Volts Nominal (DO)
Left Pendant Cylinder Limit Switch A-08 89L4 12 Volts Nominal (AI)
Left Pendant Cylinder Rod Pressure Sender A-20 90QL 1.2 Volts at 300 psi; 1 Volt at 0 psi (AI)
Main Hoist Pump 2/Drum 9 Diverting Valve
Solenoid
D-37 88DP 12 Volts Nominal (DO)
Mast Accumulator Pressure Sender A-36 90QM 1.2 Volts at 300 psi; 1 Volt at 0 psi (AI)
Mast Angle Limit A-03 89F4 12 Volts Nominal (AI)
MAX-ER PC Receive D-21
36
(RX3)
Variable
MAX-ER PC Transmit D-22
37
(TX3)
Variable
MAX-ER PC Ground C-02 0 Ground
MAX-ER PC Ground C-04 0 Ground
MAX-ER PC Ground C-13 0 Ground
MAX-ER PC Ground C-22 0 Ground
MAX-ER PC Ground C-31 0 Ground
MAX-ER PC Power C-01 8N 12 Volts
MAX-ER PC Power C-03 8N 12 Volts
MAX-ER PC Power C-12 8N 12 Volts
MAX-ER PC Power C-21 8N 12 Volts
MAX-ER PC Power C-30 8N 12 Volts Nominal
Pendant Cylinder Extend Solenoid C-08 90CR 12 Volts Nominal (DO)
Pendant Cylinder Retract Solenoid C-09 90DR 12 Volts Nominal (DO)
RCL Override (CE Option Only) E-20 89YY 12 volts Nominal (DI)
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