Electrical Installation
L1, L2 Electric Proportional Controls
for H1B Bent Axis Motors
www.danfoss.com
Electrical Installation
L1, L2, Electric Proportional Controls for H1B Motors
Revision history Table of revisions
Date Changed Rev
September 2018 Major update. 0301
September 2015 Converted to Danfosss layout. 0201
June 2009 First edition. 0101
2 | © Danfoss | September 2018 BC00000280en-000301
Electrical Installation
L1, L2, Electric Proportional Controls for H1B Motors
Contents
Product overview
Electric proportional controls...................................................................................................................................................... 4
Electric proportional with PCOR................................................................................................................................................. 4
Nomenclature....................................................................................................................................................................................4
L1BA and L2BA options..................................................................................................................................................................5
Latest version of technical literature.........................................................................................................................................6
Electrical installation
2-pin DEUTSCH connector pinout..............................................................................................................................................7
Pin compatibility...............................................................................................................................................................................7
Mating connector parts list ..........................................................................................................................................................7
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Danfoss | September 2018 BC00000280en-000301 | 3
A B C D E F G H J K L M N P
H1 B
A
Q R
Z
A
N N N
Electrical Installation
L1, L2, Electric Proportional Controls for H1B Motors
Product overview
Electric proportional controls
The electric proportional control consists of a proportional solenoid which acts directly on a two-position,
three-way porting spool. When activated, the solenoid pushes on the spool which then ports high
pressure to the larger diameter of the servo piston. The servo piston and rotating group move to change
the displacement to the point where the pressures on the servo are in balance with the force from the
feedback spring.
De-energized = maximum displacement
With a de-energized to maximum displacement control, the de-energized proportional valve keeps the
motor at maximum displacement. When energized, the solenoid pushes on the porting spool which
moves to port high system pressure to the larger diameter end of the servo piston. Depending on the
current supplied to the proportional valve, the motor will stroke between maximum displacement at zero
current and minimum displacement at maximum current.
De-energized = minimum displacement
With a de-energized to minimum displacement control, the de-energized proportional valve keeps the
motor at minimum displacement. When energized, the solenoid pushes on the porting spool which
moves to port high system pressure to the larger diameter end of the servo piston. Depending on the
current supplied to the proportional valve, the motor will stroke between minimum displacement at zero
current and maximum displacement at maximum current.
Electric proportional with PCOR
In the de-energized state, the electric proportional control keeps the motor at minimum displacement
until system pressure rises above the PCOR setting. When the PCOR activates, it ports high system
pressure to the larger end of the servo piston, increasing the motor displacement to maximum.
Nomenclature
B – L1, L2 Controls Type
C – L1, L2 Control Options
Only certain control options for the H1B motor use this electric proportional 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.
Code Description
L1 Electric proportional control, 12 V, without PCOR,
de-energized = maximum displacement, DEUTSCH DT 04-2P connector
L2 Electric proportional control, 24 V, without PCOR,
de-energized = maximum displacement, DEUTSCH DT 04-2P connector
Code Description
BA Without brake pressure defeat (BPD)
4 | © Danfoss | September 2018 BC00000280en-000301
A
B
n
min
max
C1
M4
M5 MB
L1
L2
N
MA
0 200 400 600 800 1000 1200 1400 1600 1800
mA
L2 L1
32°
6°
P003 483
0%
20%
40%
60%
80%
100%
Electrical Installation
L1, L2, Electric Proportional Controls for H1B Motors
Product overview
L1BA and L2BA options
L1 – electric proportional 12 V / de-energized = max. displacement
BA – without Pressure Compensator Over Ride / without Brake Pressure Defeat
L2 – electric proportional 24 V / de-energized = max. displacement
BA – without Pressure Compensator Over Ride / without Brake Pressure Defeat
Hydraulic schematic
A, B Main pressure lines
L1, L2 Drain lines
M4, M5 Gauge port servo pressure
MA, MB Gauge port system pressure
N Speed sensor (optional)
Displacement (%) versus Input Command (mA)
Options L1BA, L2BA
Solenoid C1
De-energized = max. displacement
Full-energized = min. displacement
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Danfoss | September 2018 BC00000280en-000301 | 5
L1, L2 = L1, L2 Control
Grey area = Intended to be used for zero degree capability.
Formulas how to calculate start and end input command (mA) dependent on displacements
Input command (mA) % displ. Control *1 Control *2
Start input command from 100 % 480 ± 10 240 ± 5
from y % max. (1 - Vgy/V
) x 1110 + 480 (1 - Vgy/V
gmax
) x 570 + 240
gmax
W
Electrical Installation
L1, L2, Electric Proportional Controls for H1B Motors
Product overview
Formulas how to calculate start and end input command (mA) dependent on displacements (continued)
Input command (mA) % displ. Control *1 Control *2
End input command at 0 % 1590 ± 130 810 ± 67
at x % min. (1 - Vgx/V
Maximum allowed current 1800 920
Where:
) x 1110 + 480 (1 - Vgx/V
gmax
) x 570 + 240
gmax
V
V
V
Maximum, theoretic possible motor displacement per revolution (cm3/rev)
gmax
Minimum displacement setting of desired unit (cm3/rev)
gx
Maximum displacement setting of desired unit (cm3/rev)
gy
x Minimum displacement (%)
y Maximum displacement (%)
Proportional solenoid data C1
Description 12 V 24 V
Maximum current 1800 mA 920 mA
Nominal coil resistance @ 20 °C [68 °F] 3.66 Ω 14.20 Ω
@ 80 °C [176 °F] 4.52 Ω 17.52 Ω
Inductance 33 mH 140 mH
PWM signal frequency Range 70 – 200 Hz
Recommended
IP Rating IEC 60 529 IP 67
DIN 40 050, part 9 IP 69K with mating connector
Connector color Black
*
PWM signal required for optimum control performance.
*
150 Hz
Warning
Zero degree capability results in a high risk of overspeed and drops in efficiency if the motor operates
between 0–20% displacement.
Latest version of technical literature
Danfoss product literature is online at: https://www.danfoss.com/en/search/
6 | © Danfoss | September 2018 BC00000280en-000301
1 2
Electrical Installation
L1, L2, Electric Proportional Controls for H1B Motors
Electrical installation
2-pin DEUTSCH connector pinout
Pin compatibility
PLUS+1® module pin type H1B L
Pin Function
1, 2 PWMOUT/DOUT/PVG Power supply
1, 2 PWMOUT/DOUT/PVGOUT
1, 2 Power ground
*
Use output pins with configurable PWM frequency for L* controls.
1. PWM signal
2. Ground
Alternative pinout:
1. Ground
2. PWM signal
*
*
Mating connector parts list
Connector ordering data
Description Quantity Ordering number
Mating connector 1 DEUTSCH DT06-2S
Wedge lock 1 DEUTSCH W2S
Socket contact (16 and 18 AWG) 2 DEUTSCH 0462-201-16141
Danfoss mating connector kit 1 K29657
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Danfoss | September 2018 BC00000280en-000301 | 7
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