2  RHD250 to 4000 (Contrac) ELECTRICAL ROTARY ACTUATOR |  SEI/RHD250/4000-EN REV. A 
 
Table of contents 
 
 
1  Safety .......................................................................... 3 
General information and instructions .................................. 3 
Warnings .................................................................................... 3 
Intended use ............................................................................. 4 
Improper use ............................................................................. 4 
Notes on data safety ............................................................... 4 
Warranty provisions ................................................................. 4 
Manufacturer’s address .......................................................... 4 
2  Introduction ............................................................... 5 
Safety and precautions ........................................................... 5 
Tools ........................................................................................... 5 
3  Lubrication ................................................................. 6 
Mounting position............................................................... 6 
Oil change .................................................................................. 6 
RHD oil types ........................................................................ 7 
4  Maintenance ............................................................... 8 
Safety instructions ................................................................... 8 
General ....................................................................................... 8 
Lever ........................................................................................... 8 
Lever removal ............................................................................ 8 
Lever installation ................................................................. 9 
Ball-and-socket-joint .......................................................... 9 
Tightening torques and dimensions of lever screws . 10 
Sealing ring of output drive shaft ....................................... 11 
Sealing ring of hand wheel drive / hand wheel shaft ...... 12 
Sealing of the position sensor drive ................................... 12 
RHD250...RHD800 ............................................................. 12 
RHD1250... RHD4000 ............................................................. 13 
Motor ........................................................................................ 13 
Motor assignment and tightening torque .................... 13 
Motor removal.................................................................... 14 
Motor flange O-ring .......................................................... 14 
Motor disassembly / assembly ...................................... 15 
Exchange of motor bearings ........................................... 18 
Exchange of motor shaft sealing ring ........................... 18 
Brake adjustment ................................................................... 19 
Brake of motor series 1 ......................................................... 19 
Brake of motor series 2 ......................................................... 19 
5  Electrical connections ............................................. 20 
General ..................................................................................... 20 
Covers ....................................................................................... 20 
Electronic Unit EBN853 (Contrac) / EBN861 (Contrac) / 
EBS862 (Contrac) ................................................................... 21
 
Analog / Digital .................................................................. 21 
PROFIBUS DP®.................................................................... 22 
Electronic Unit EBN852 (Contrac) ....................................... 23 
Analog / Digital .................................................................. 23 
 
Fuses ........................................................................................ 24 
Electronic unit for field installation ............................... 24 
Electronic units for rack installation ............................. 24 
Fuse location EBN853 ...................................................... 25 
Fuse location EBN861 / EBS862 ..................................... 25 
External fuses for EBN861 / EBS862 ............................. 26 
Fuse location in EBS852 ................................................... 26 
6  Exchange of position sensor .................................. 27 
Dismounting ........................................................................... 27 
Mounting ................................................................................. 27 
Mounting ................................................................................. 28 
7  Electrical test values .............................................. 29 
Test values (position sensor) .............................................. 29 
Test values (Brake and Motor) ............................................ 30 
Brake voltage ..................................................................... 30 
Motor voltage .................................................................... 30 
Winding resistance ........................................................... 30 
8  Troubleshooting ...................................................... 31 
LED signals at commissioning and service field ............... 31 
9  Troubleshooting ...................................................... 31 
General ..................................................................................... 32 
Failures at brake, fuse or wiring ......................................... 33 
Operation mode (MAN / AUT) ............................................. 34 
Input configuration ............................................................... 35 
Operation behind step controller ....................................... 36 
Failure Diagram ...................................................................... 37 
Failure due to response of positioning loop monitoring
  38
 
General ..................................................................................... 38 
User interface menus ............................................................ 39