520L0312 • Rev BA • Sep 2013
Features y Maintenance free
y Compact design
y Built-in end stop and feedback sensors
y Safety according to EN1726, EN1175-1 and
EN954-1, Category 3
y CAN-Bus interface
Tech Note
EPS – Electric Power Steering for warehouse trucks,
tow tractors and other battery powered vehicles
EPS is an integrated, flexible and safe AC
electric power steering system designed to
succeed conventional hydraulic, mechanical
and electric DC steering systems.
MAKING MODERN LIVING POSSIBLE
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Tech Note EPS – Electric Power Steering
520L0312 • Rev BA • Sep 20132
Steering actuator EPSA 100 EPSA 200 EPSA 300
Supply voltage V DC
Nominal 24 48 24 48 48 80
Tolerance -35% +20%
Current A A
Nominal 10 5 20 10 15 9
Max. 17 9 34 17 26 15
Static load torque on
output shaft
Nm
S3-60% 17 33 50
S3-30% 35 60 76
Peak torque on output shaft Nm 56 111 167
Max. speed on ouput shaft
rpm 90
°/sec 540
Max. radial shaft load N 1570
Operating attitude No restriction
Technical data
Steering reference sensor EPSR
Angular rotation ° 360
Shaft diameter mm
∅4
Shaft length mm 18
Weight kg 0.4
System variants
Type I
(Open Loop)
Type II
(Open Loop)
Type III
(Closed Loop)
Steering reference sensor Generator (EPSR) Generator (EPSR) Potentiometer
Steering actuator
CAN-Bus interface CAN-Bus interface
Built-in end stop
sensor
Built-in end stop
and position
feedback sensors
The EPS is dedicated to warehouse trucks (pallet
trucks, pallet stackers, order pickers, reach trucks
and high rack stackers), but can also be used on
other battery vehicles.
Application
Function
The EPS system constitutes of only two parts:
A small steering reference sensor and a compact
steering actuator.
The steering reference sensor converts the
motion of the steering demand into an electric
signal. It can be mounted on a mini steering
wheel or a tiller arm.
The steering actuator pivots the steered wheel
via a chain or a pinion. It consists of a
maintenance free brushless AC-motor, a cycloidal
gear, a programmable controller with CAN, an
inverter, plus unique built-in end stop and
position feedback sensors.
Phased Out Products
Tech Note EPS – Electric Power Steering
520L0312 • Rev BA • Sep 2013 3
Connections
Pin Connection Pin Connection
B26 Battery - B13 Battery +
B25 Battery - B12 Battery +
B24 Battery - B11 Battery +
B18 Release B6 Release
B16 EPSR/Potentiometer B4 EPSR/Potentiometer
B14 Key
A11 CAN_High
A10 CAN_Ground A2 CAN_Low
A9 Safety circuit A1 Safety circuit
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Danfoss can accept no responsibility for possible errors in catalogues, brochures and other printed material. Danfoss reserves the right to alter its products without notice. This also applies to products
already on order provided that such alterations can be made without changes being necessary in specifications already agreed.
All trademarks in this material are property of the respective companies. Danfoss and the Danfoss logotype are trademarks of Danfoss A/S. All rights reserved.
Danfoss
Power Solutions GmbH & Co. OHG
Krokamp 35
D-24539 Neumünster, Germany
Phone: +49 4321 871 0
Danfoss
Power Solutions ApS
Nordborgvej 81
DK-6430 Nordborg, Denmark
Phone: +45 7488 2222
Danfoss
Power Solutions (US) Company
2800 East 13th Street
Ames, IA 50010, USA
Phone: +1 515 239 6000
Danfoss
Power Solutions Trading
(Shanghai) Co., Ltd.
Building #22, No. 1000 Jin Hai Rd
Jin Qiao, Pudong New District
Shanghai, China 201206
Phone: +86 21 3418 5200
520L0312 • Rev BA • Sep 2013 www.danfoss.com © Danfoss A/S, 2013-09
Data Sheet Document title
Dimensions EPSA
EPSR
Type L
1
L
2
EPSA 100 143 302
EPSA 200 153 312
EPSA 300 233 382
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