Konrak AFH Cross Rod Position Limit Switch
Compact cross-rod limit switch for overhead cranes, hoists and general machinery — four maintained positions every 90°, sealed to IP67.
Precise end-of-travel control
The Konrak AFH is a compact cross-rod position limit switch built for precise end-of-travel control of overhead cranes, hoists and general machinery. A cross-shaped set of aluminium rods is actuated by the moving part of the machine, and every 90° quarter-turn gives a maintained switching position — so a single switch reliably signals upper, lower and intermediate limits.
Its reduced overall dimensions make it easier to fit where space is limited, while the 6×6 mm aluminium rods remain fully adjustable on site for exact limit setting. IP67 double insulation, a self-extinguishing thermoplastic housing and positive-opening NC contacts make the AFH a precise, reliable and safe device for demanding industrial environments.
- Built for lifting & handling — for bridge cranes, hoists and general industrial machinery.
- Four positions in one device — cross rods give 4 maintained positions every 90°.
- On-site adjustment — fully adjustable 6×6 mm aluminium rods with “0” indicator.
- Safety by design — positive-opening NC contacts with double breaking.
Konrak AFH is the equivalent of the FFH position limit switch and shares its performance class. Technical drawings and full test data are available on request.
Designed for reliable, safe positioning
Compact design
Reduced overall dimensions compared with the classic cross-rod series — easy to fit in tight spaces.
Four maintained positions
Cross rods provide 4 maintained positions every 90°, covering four directions with one switch.
Adjustable aluminium rods
6×6 mm aluminium rods (2×200 mm) with a “0” reference indicator, fully adjustable on site.
IP67 protection
Double insulation and IP67 sealing (IEC/EN 60529) against dust and water.
Positive-opening NC contacts
Double-breaking, positive (forced) opening NC contacts for reliable safety functions.
Robust housing
Self-extinguishing thermoplastic enclosure (V0), with a reinforced mechanical stop.
4 fixing holes
Four fixing holes for fast, secure and repeatable mounting.
2 cable-clamp outputs
Two cable-clamp outputs reduce installation time and make wiring easier.
Multiple versions
Single speed (3 or 4 positions) and double speed versions; further configurations on request.
From actuator contact to a safe stop
A purely mechanical device — no programming and no power supply.
Actuation
The moving part of the crane or machine contacts one of the cross rods.
Rotate 90°
The crossed-rod mechanism turns through a quarter turn — 4 maintained positions.
Cam switching
The internal P016 cam switch opens or closes its contacts; NC contacts open positively for safety.
Control action
The control system slows, stops or reverses the drive at the exact limit position.
AFH technical data
| Standards | IEC/EN 60947-3 |
| Case | Self-extinguishing thermoplastic housing (V0) |
| Protection class | IP67 — double insulation (IEC/EN 60529) |
| Cable entry | M16 / M20 |
| Actuator | Cross rods — 4 maintained positions every 90° |
| Rods | Fully adjustable aluminium, 6×6 mm section, 2×200 mm, with “0” indicator |
| Contacts | Double breaking, positive-opening NC for safety functions |
| Fixing | 4 fixing holes |
| Cable-clamp outputs | 2 |
| Ambient temperature | Operating: −25 °C … +55 °C · Storage: −30 °C … +70 °C |
| Marking | CE · CCC · EAC |
| Cam switch line | P016 |
| Rated enclosed thermal current (Ithe) | 16 A |
| Rated insulation voltage (Ui) | 690 V |
| Rated operating voltage (Ue) | 690 V |
| Rated impulse withstand voltage (Uimp) | 4 kV |
| Rated operating current (AC-21A / AC-22A) | 16 A — 690 V AC |
| AC-23A 3-phase 230 V | 13 A — 4 kW |
| AC-23A 3-phase 400 V | 13 A — 7.5 kW |
| Frequency | 50 / 60 Hz |
| Contacts | Double gap, positive opening |
| Terminal screw / block | M3.5 · block A3 (EN 60947-1) |
| Tightening torque | 0.8 N·m |
| Connectable section | 1 × 0.75…4 mm² or 2 × 0.75…2.5 mm² (10–18 AWG) |
Electrical ratings are typical for the P016 cam switch line. Certificates and full test data are available on request.
Available versions
Several standard versions are available, and every configuration can be customised on request.
Order codes & contact arrangements
The AFH is supplied under the standard codes below, each defined by actuator speed, number of positions and contact arrangement. Contact openContact closed
| Contacts | −90° | 0° | +90° |
|---|---|---|---|
| 1–2 | |||
| 3–4 |
| Contacts | −90° | 0° | +90° |
|---|---|---|---|
| 1–2 | |||
| 3–4 | |||
| 5–6 | |||
| 7–8 |
| Contacts | 0° | 90° | 180° | 270° |
|---|---|---|---|---|
| 1–2 | ||||
| 3–4 |
| Contacts | 0° | 90° | 180° | 270° |
|---|---|---|---|---|
| 1–2 | ||||
| 5–6 |
| Contacts | 0° | 90° | 180° | 270° |
|---|---|---|---|---|
| 1–2 | ||||
| 5–6 |
| Contacts | −180° | −90° | 0° | +90° | +180° |
|---|---|---|---|---|---|
| 1–2 | |||||
| 3–4 | |||||
| 5–6 | |||||
| 7–8 |
Contact numbersnumbers refer to the terminal pairs of the built-in cam switch. Other versions and custom contact arrangements are available on request.
Where the AFH is used
Position limit switches are used to control handling systems in lifting, automation, stage technology and machine tools.
Overhead & bridge cranes
Controls the operating system (e.g. PLC) and allows the crane to slow down or stop at its limits.
Hoists & winches
Stops the hoist the moment it reaches a limit position.
Industrial doors & gates
Open / close limits for overhead doors and industrial closures.
Wind turbines
Position limits in renewable-energy systems.
Stage & theatre machinery
Positioning of stage machinery and lighting hoists.
General machinery
End-of-travel control for automated machinery and machine tools.
The benefits you can count on
High protection
IP67 double insulation and a rugged thermoplastic housing.
Precise & reliable
4 maintained positions every 90°, adjustable on site.
Guaranteed safety
Positive-opening NC contacts prevent over-travel.
Easy to install
4 fixing holes and 2 cable-clamp outputs for quick wiring.
| European directives | 2014/35/EU (LVD) · 2011/65/EU (RoHS) · 2015/863/EU |
| Product standards | EN 60947-1 · EN 60947-3 · EN 60204-1 · EN 60529 |
| Environment / materials | EN 50581 · IEC 63000 |
Frequently asked questions
What is the AFH used for?
It controls the end of travel of overhead/bridge cranes, hoists and general machinery — stopping or slowing the drive at upper, lower and intermediate limits.
How does the cross-rod actuator work?
A cross of aluminium rods gives 4 maintained positions every 90°, so one switch covers four directions of approach.
What protection class does it offer?
IP67 with double insulation (IEC/EN 60529).
Are the contacts suitable for safety circuits?
Yes — the NC contacts have positive (forced) opening and double breaking for reliable safety functions.
Can the rods be adjusted?
Yes, the 6×6 mm aluminium rods are fully adjustable on site and carry a “0” reference indicator.
Which versions are available?
Single speed (3 or 4 positions) and double speed versions; other configurations on request.
What temperature range does it work in?
Operating −25 °C to +55 °C; storage −30 °C to +70 °C.
Need the right AFH for your machine?
Tell us your application and mounting requirements — our engineers will recommend the exact configuration, and we can supply a sample or OEM version.
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