Description

Safety Drop Stop Servo “SDS”

Safety Drop Stop “SDS” Servo Hoist

Series: KSH250S / KSH350S / KSH500S / KSH750S / KSH1000S

Knight leads the industry with the next-generation KSHS Safety Drop Stop Servo Hoist (Patent No. 10,099,904) – the smartest and safest hoist in the world. The KSHS series integrates the exclusive “Safety Drop Stop” (SDS) feature with a dual-chain design: one load-bearing chain and one accompanying safety back-up chain.

The series adds advanced functionality for Intelligent Assist Devices (IAD), letting the operator position and “float” a load precisely along the “Z” axis (the vertical axis).

The KSHS series supports a wide range of application solutions through programmable features and unlimited I/O ports. Unlike conventional hoists that require button pressing, the SDS Servo Hoist lets the operator simply grip the handle and move the load naturally.

The hoist also integrates a graphite stick inside the gearbox that keeps the chain continuously lubricated. Replacement sticks can be ordered separately.

Product Details

Mechanical

Dual-chain design for safety:
- Load chain: carries the entire load.
- Safety chain: accompanying back-up and protection.
Speed: up to 241 ft/min [60 m/min].
Safety factor 125%.
Fail-safe automatic brake.
Proprietary Knight chain – outstanding service life.
Unlimited chain length (12–18 ft standard).
Fully sealed worm-gear gearbox.
H5 rating (continuous duty cycle).
Built-in graphite chain lubrication stick.

Software

STO – Safe Torque Off.
Enhanced user interface (UI).
Ethernet connectivity.
Programming and diagnostic ports.
Virtual travel limits.
Speed reduction zones.
Impact limiting.
Active damping.
Knight exclusive Float Mode.
Programmable overload capability.

Electrical

Industry-standard 24 VDC, 2 AMP supply – for custom tooling: grippers, vacuum cups, switches, position sensors, lights, etc.
Illuminated Run/Stop button. Faster-responding enable trigger.
240 VAC, single phase, 50/60 Hz.
Load sensing: actual payload and handle load.
I/O capability: (4) analog inputs / (4) analog outputs; (24) configurable I/O ports; (8) dedicated inputs; unlimited expansion over Ethernet.
Status LEDs: blue/green button. Fault LED: red Run-Stop button illuminates, twist to unlock.
Optional corded pendant or wireless remote control.

SDS Servo Hoist Series Specifications

Model Code	Capacity lbs [kg]	Max Speed fpm [mpm]	Voltage / Phase
KSH250S-2401	250 lbs [113 kg]	196.85 fpm [60.0 mpm]	240V / 1 phase
KSH350S-2401	350 lbs [158 kg]	241.00 fpm [73.5 mpm]	240V / 1 phase
KSH500S-2401	500 lbs [226 kg]	98.43 fpm [30.0 mpm]	240V / 1 phase
KSH750S-2401	750 lbs [340 kg]	123.03 fpm [37.5 mpm]	240V / 1 phase
KSH1000S-2401	1,000 lbs [453 kg]	82.02 fpm [25.0 mpm]	240V / 1 phase
KSH2000S-2401	2,000 lbs [907 kg]	37.50 fpm [11.43 mpm]	240V / 1 phase

Typical Applications

When To Use An SDS Servo Hoist

Automotive and heavy equipment assembly lines requiring precise, continuous lifting.
Applications that need the load held floating (Float Mode) at a defined position.
Environments demanding high safety standards (CE, SEMI-S2).
Integration into automation systems with I/O expansion over Ethernet.
Replacing conventional hoists to raise productivity and reduce operator fatigue.

Choosing The Right Model

KSH250S / KSH500S: Light components, electronics assembly stations, medical devices.
KSH350S: Highest speed (241 fpm) – fast-cycle lines.
KSH750S / KSH1000S: Large parts: engines, gearboxes, housings.
KSH2000S: Extra-heavy loads up to 907 kg – engineered to project.

*Note: All models are compatible with Knight aluminium rail systems RAD4110, RAD6110, RAD7510 and the full range of trolley, rotary union and handle accessories. Contact FULLSHARP for advice on the right configuration for your project.

Accessories – Servo Controls