Electric two-position controls
The electric two-position control consists of an off/on-solenoid which acts on a two position, three-way
porting spool. Servo pressure is internally supplied to the two-position porting spool by an integral
system pressure shuttle.
De-energized = maximum displacement
When the solenoid is de-energized, the motor runs at maximum displacement. When energized, the
solenoid applies a force on the spool which ports high pressure to the larger diameter of the servo piston
and strokes the motor to minimum displacement. When the solenoid is de-energized, the motor strokes
back to maximum displacement.
De-energized = minimum displacement
When the solenoid is de-energized, the motor runs at minimum displacement. When energized, the
solenoid applies a force on the spool which ports the larger diameter of the servo piston to tank, and
strokes the motor to maximum displacement. When the solenoid is de-energized, the motor strokes back
to minimum displacement.
Electric two-position with PCOR
In the de-energized state, the electric two-position control supplies both sides of the servo piston and
keeps the motor at minimum displacement as long as the high loop pressure remains below the pressure
compensator setting. If the high loop pressure rises above the pressure compensator setting, the porting
spool ports the larger diameter of the servo piston to tank. The motor strokes in the direction of
maximum displacement.
Nomenclature
A B C D E F G H J K L M N P
H1 B
A
Q R
Z
A
N N N
B – Control options
Code Description
T1 Electric two-position control with PCOR, 12 V, de-energized = minimum displacement
DEUTSCH DT 04-2P connector
T2 Electric two-position control with PCOR, 24 V, de-energized = minimum displacement
DEUTSCH DT 04-2P connector
C – Servo supply options
Code Description
DA Without brake pressure defeat (BPD)
D1 With BPD 12 V, de-energized BPD = PCOR active at port A, DEUTSCH DT 04-2P connector
D2 With BPD 24 V, de-energized BPD = PCOR active at port A, DEUTSCH DT 04-2P connector
G1 With BPD 12 V, de-energized BPD = PCOR active at port B, DEUTSCH DT 04-2P connector
G2 With BPD 24 V, de-energized BPD = PCOR active at port B, DEUTSCH DT 04-2P connector
Only certain control options for the H1B motor use this electric two-position control. Please refer to the
motor’s nomenclature to determine if the motor is equipped with the proper option. You can find the
nomenclature on the motor’s nametag. For nomenclature details, refer to H1B Bent Axis Variable
Displacement Motors Technical Information, BC00000043.
Electrical Installation
T1, T2 Electric Two-Position Controls for H1B Motors
Product overview
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Danfoss | September 2018 BC00000276en-000301