ifm RM9000 Absolute Multiturn Encoder, CANopen, 24 bit

ifm RM9000 Absolute Multiturn Encoder, CANopen, 24 bit

The ifm RM9000 is an absolute multiturn encoder with a solid shaft of 10 mm and a synchro flange. It resolves 4096 steps per turn and counts 4096 revolutions, a total of 24 bit, and outputs the value as binary code over a CANopen interface (DSP-406 V3.1, DS 301 V4.02, DS 306 V2.0). The accuracy is 0.08 degrees, and the position is traceable even when the machine has been moved while unpowered.

The housing is 36.5 mm in diameter and 100 mm long, with an aluminium flange, and the protection rating is IP68 and IP69K for ambient temperatures from -40 to 85 degrees Celsius. Seven Star LLC supplies the RM9000 in Oman and the GCC as an independent supplier in Muscat.

RM9000 technical specifications

The table lists the values published by the manufacturer for the RM9000. Where a parameter has several operating modes, the headline value is shown; the full parameter list is in the manufacturer documentation.

How the RM9000 works

The RM9000 is an absolute multiturn encoder: each shaft position and each full revolution is stored as a unique code, so the position is known immediately after switching on and is retained even when the machine was moved while unpowered. The value is delivered over a CANopen interface, which carries position, speed and configuration data to the controller on a shared bus. The solid shaft connects to the machine through a coupling.

Where the RM9000 fits and related parts

The RM9000 is the absolute encoder for networks based on CANopen. For pulse counting systems the incremental RV3100 is the alternative, with programmable resolution over IO-Link. Replacing an existing absolute encoder needs matching of flange, shaft diameter and the protocol; the RM9000 is a CANopen device with a 10 mm shaft and synchro flange.

Selection and ordering checklist for the RM9000

Work through the points below before you confirm the order, so that the RM9000 you receive is the one your machine or plant needs.

• Check mechanical fit: 10 mm solid shaft and synchro flange
• Check the protocol: CANopen, factory baud rate 125 kBit/s, node ID 32
• Check supply 9 to 30 V DC
• Check shaft loads (180 N axial and radial) and speed (6000 rpm)
• Select the M12 axial cordset with five contacts

The manufacturer lists this article under the type designation Absolute multiturn encoder with solid shaft, RMS0024-C24/US. The article number RM9000 is the reference to quote when ordering, and the type designation is useful for technicians who compare the label on an installed unit.

Installation, commissioning and maintenance

Mount the encoder on a synchro flange and connect it to the shaft with a flexible coupling that takes up misalignment, since the permitted axial and radial shaft loads are low. Set the CANopen node ID and baud rate to match the network before connection, remembering the factory values, and terminate the bus properly. At commissioning, define the zero position by setting a preset value, then rotate the shaft and confirm the counting direction in the controller. Check the coupling and connector periodically in vibrating machines.

Set node ID and baud rate before the encoder goes onto a running network. After mounting, set the zero (preset) and check the direction of counting in the PLC. The starting torque is only 0.05 Nm, so use a coupling designed to avoid forces on the bearing.

Typical applications in Oman and the GCC

Position feedback on cranes, valve and gate actuators, positioners, packaging machines and drum winches. In Oman and the GCC the IP69K housing and the -40 to 85 degrees Celsius range support outdoor machinery in dust and heat.

Encoders on outdoor drives and rotating equipment face heat, dust and washdown. A flexible coupling, correct cable strain relief and a sealed connector matter more for life than the encoder resolution itself.

RM9000 compared with related ifm types

The table places the RM9000 next to neighbouring types in the same application group, so you can see whether a sibling would suit the job better.

Information to send with an RFQ for the RM9000

To prepare an accurate offer for the RM9000, please include the following with your enquiry:

• Shaft diameter and flange type of the existing encoder
• Interface and protocol needed by the controller
• Resolution (steps per turn and number of turns)
• Connector or cable outlet direction
• Quantity and delivery location

Storage, handling and spares for the ifm RM9000

Keep the ifm RM9000 in its original packaging until installation, and store it indoors in a dry place without condensation. Protect connectors and cable ends from dust and moisture. In hot GCC warehouses, check that the storage temperature stays inside the range given in the manufacturer datasheet before the unit is installed.

• Check the article number and connection type against the drawing before mounting.
• Use the mounting accessories and connection cables recommended for the device, and route cables away from power wiring.
• Keep at least one spare unit of each type used on critical machines, so that a failed device can be swapped quickly.
• Record the device type, firmware version where relevant, and parameter settings, so that a replacement can be set up the same way.

When you order the ifm RM9000, include the matching cables, connectors or mounting parts in the same RFQ. This avoids delays at commissioning when a small accessory is missing.

Documents and quotation

No datasheet is attached to this page. Send us the part number RM9000 and we will confirm which documents are available, such as the datasheet and operating instructions, and for IO-Link devices the device description file.

Seven Star LLC is an independent supplier in Muscat serving Oman and the GCC and is not affiliated with the manufacturer; the name ifm is used only to identify the product. Prices are not shown on the page, so send the part number, the quantity and the delivery location to receive a quotation.