Slip ringsDiscontinued
LTN slip rings (power, signal and Ethernet)
LTN's custom and standard slip ring range carried signals from a few mV or mA up to 300 A and 1,500 V, Fast, Gigabit and 10 Gigabit Ethernet, real-time fieldbuses and contactless fibre optic channels.
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LTN Servotechnik lists this series as discontinued. We can help with spares for installed machines, a migration to the replacement, or an alternative. Find a replacement.
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Need LTN Servotechnik parts, a replacement or another suitable option? Send your part number or describe the application. We’ll review the requirement and help with product selection, sourcing, pricing and lead times.
- Exact parts and engineer-checked alternatives
- Manufacturer-direct options where available
- Standard, modified and custom solutions
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Key specifications
| Voltage (max) | 1,500 V |
|---|---|
| Data / bus | Fast Ethernet, Gigabit Ethernet, 10 Gigabit Ethernet, real-time fieldbus |
| Current (max) | 300 A |
| Standards | Ethernet variants certified to TIA-568 and EN 50173 |
Summarised in our own words from HEIDENHAIN Corporate Group (LTN brand; LTN Servotechnik GmbH ceased operations 30 April 2026)'s published data; series maxima, individual models vary. Last checked 2026-10-30. Source 1 · Source 2
Notes on this data
Figures from LTN's 2019 company brochure. HEIDENHAIN states LTN slip rings are discontinued; no replacement named. LTN Servotechnik GmbH ceased operations on 30 April 2026; HEIDENHAIN continues LTN resolvers.
Specify Motion is not affiliated with HEIDENHAIN Corporate Group (LTN brand; LTN Servotechnik GmbH ceased operations 30 April 2026). LTN Servotechnik and LTN slip rings (power, signal and Ethernet) are used only to identify the product. Comparisons use published figures; always confirm against the current datasheet.
LTN slip rings (power, signal and Ethernet) replacement and alternative options
Use these supply-network options as a starting point for an engineering check. We can also help source the original LTN Servotechnik part. Published series figures do not establish an exact-model or drop-in replacement: confirm ratings, fit, interfaces and approvals for your application.
A small analogue power-and-signal slip ring with FASTON quick-connect terminals for fast wiring in dusty, high-cycle machinery. Optional IP65 sealing.
Figures are the highest published for each series and are not always measured the same way. A higher figure is not automatically a better choice: mounting, duty cycle, feedback, connectors and approvals matter too. An engineer will check the fit against your application before recommending anything.
Typical applications
What a slip ring is
This group covers slip rings that do not fit a single standard format, including modular and split designs, contactless capacitive or optical data rings, temperature-rated units, quick-connect terminal designs, very high circuit counts and application-specific assemblies for wind turbines or packaging. All solve the same problem: transferring power, signals or data between stationary and rotating parts of a machine. What differs is the construction, which may be a split housing, a modular stack, a non-contact data path or a special material set.
When engineers choose a slip ring
Engineers look at these designs when a standard capsule, through-bore or pancake unit does not fit the job. Split rings suit retrofits onto existing shafts. Contactless data rings suit high data rates or long life without wear. Modular units allow circuit counts to change between machine variants. The trade-offs are cost, availability and, for custom designs, longer lead times and qualification. Match the construction to the real constraint, whether that is installation, data, temperature or circuit count.
How to specify the LTN slip rings (power, signal and Ethernet)
Send these with your enquiry and an engineer can confirm the right LTN slip rings (power, signal and Ethernet) variant or an equivalent:
- What makes the application non-standard: installation, data, temperature, circuit count or format
- Circuits, current and voltage (A, V)
- Data protocols and rates
- Speed (rpm) and expected life (revolutions)
- Bore, envelope and mounting (mm)
- Temperature range (°C) and IP code
- Terminations, such as flying leads, connectors or quick-connect tabs
Common mistakes to avoid
- Choosing a special design when a standard type with minor changes would do
- Not stating the actual constraint, so the supplier offers the wrong format
- Assuming contactless data channels also carry power
- Underestimating lead time for custom or modular builds
LTN slip rings (power, signal and Ethernet): frequently asked questions
Can you help replace LTN slip rings (power, signal and Ethernet) or source the original?
Send the full model code, quantity and required date. Our engineers can check original-part availability and assess suitable alternatives, including Motion Control Products options where appropriate. We confirm compatibility and any changes needed before recommending a replacement.
What is the LTN slip rings (power, signal and Ethernet)?
LTN's custom and standard slip ring range carried signals from a few mV or mA up to 300 A and 1,500 V, Fast, Gigabit and 10 Gigabit Ethernet, real-time fieldbuses and contactless fibre optic channels. Published series figures include voltage 1,500 V, current 300 A. It is made by HEIDENHAIN Corporate Group (LTN brand; LTN Servotechnik GmbH ceased operations 30 April 2026); Specify Motion can help source it or propose an equivalent.
Who makes the LTN slip rings (power, signal and Ethernet)?
The LTN slip rings (power, signal and Ethernet) is made by LTN Servotechnik (HEIDENHAIN Corporate Group (LTN brand; LTN Servotechnik GmbH ceased operations 30 April 2026)) and is listed here for engineers comparing options. Specify Motion is not affiliated with HEIDENHAIN Corporate Group (LTN brand; LTN Servotechnik GmbH ceased operations 30 April 2026); brand names are used only to identify the product.
What is the voltage of the LTN slip rings (power, signal and Ethernet)?
The published series maximum voltage is 1,500 V. Individual models and sizes in the LTN slip rings (power, signal and Ethernet) range vary, so check the exact variant against your duty cycle, mounting and environment, or ask our engineers to confirm the right size for you.
Is the LTN slip rings (power, signal and Ethernet) still available?
LTN Servotechnik lists the LTN slip rings (power, signal and Ethernet) as discontinued. We can help with spares for installed machines, a migration, or an equivalent from our supply network that meets the same published figures.
What is a split slip ring?
A split slip ring has a rotor and housing made in two halves, so it can be fitted around an existing shaft without removing the shaft or its bearings. It suits retrofits and large machines where disassembly would be costly. Expect tighter installation tolerances and possibly a lower speed rating than a one-piece unit.
What is a contactless slip ring?
A contactless slip ring transfers data, and sometimes power, across rotation without sliding contacts, using capacitive, inductive or optical coupling. There is no wear on the data path, so life is long and very high data rates are possible. Contactless power is usually limited, so many designs combine a contactless data channel with conventional power rings.
Further reading: How to select a slip ring · How to specify a slip ring · Slip rings
Other slip rings series
Engineer support
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Tell us how you use the LTN slip rings (power, signal and Ethernet): the load, speed, duty and environment. Our engineers will confirm whether it is still the right part, find it for you, or propose an alternative that fits better.
- Reviewed by an engineer, not an autoresponder
- Like-for-like and better-fit alternatives
- Standard, modified and custom options
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