Heave Compensator

Heave Compensator
Heave Compensator
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Product Code : 055
Brand Name : Hohner
Product Description

EM90A4 'Shark' - Heave Compensator


Part Number: EM9FA4 / XXCD


12 to 18 m of 2.2 diameter stainless steel cable

Tension maintained via internal spring system


The unit has a built in magnetic brake system to limit the cable speed in case of cable rupture.

See video



Depends on encoder



Technical Data Part Number
Operating temp: - 40 ...+   60 degrees C -EM9FA4 / 10CD - 10m cable
- 40 ...+ 140 degrees F -EM9FA4 / 12CD - 12m cable
Certification: ATEX, IECEx, CSA -EM9FA4 / 15CD - 15m cable
Weight: 15 lbs (6.8 kg) -EM9FA4 / 18CD - 18m cable
Protection: IP 54 (structure)
Material Structure: Coated Aluminum

-After the 10CD, 12CD, 15CD or 18CD add first 4 digits of

Tension Springs: Dual springs  encoder to be used so we can make the adaptor flange
Mechanism: Aluminum


Material Pulleys: Aluminum Output Options from Encoder
Material Cable: Stainless Steel 2.2mm -Any standard drawworks (NAMFPX) series encoders
Material Encoder: Depends on Model      Incremental 5...24V
Tension on Cable: Between 15 and 20N      Incremental NAMUR
Max Reel Out Accel: 25m/s2      Tachometer
Max Reel In Accel: 10m/s2 -Multi-turn solid shaft encoders
Cable Break Load: 3,622 N      Absolute Parallel
Max Static Torque: 35N      Absolute ProfiBus
     Absolute DeviceNet
Total Error: +/- 2.2mm


Anti Tangle Mechanism

Brake Mechanism
The cable winds onto a single layer of the drum, ensuring that each revolution has the same linear distance equivalent.  A simple, yet sturdy internal mechanism prevents tangling   The unit has a built in magnetic brake system to limit the cable speed in case of cable rupture.  No external air or electrical connections are required.  See video

Installation Manual:

Heave Compensator installation manual


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