HDMI/3G-SDI Slip Ring DHM025-4P/28S-3RF

Slip rings of the DHM025-4P/28S-3RF series are specially design to transmit high-definition(1080P) video signals with power and common signals, and also can be combine with uncompressed high quality video signals with max. 1.5GHz from a rotary joint.


Electrical DataMechanical Data
No. of RingsPower, 4rings
Signal, 28rings
Rated CurrentPower, 8A/ring
Signal, 2A/ring
Working Speed250rpm
Rated Voltage0-240VAC/VDCWorking Temperature-40℃~+80℃
Insulation Resistance500MΩ/500VDCWorking Humidity60% RH or higher
Dielectric Strength500VAC@50HZ,60SStructure MaterialAluminum alloy
Lead SizePower,AWG18# Silver-plated teflon
Signal,AWG28# Silver-plated teflon
Contact MaterialGold to gold
Electrical Noise<0.01ΩProtection levelIP51
Lead Length250mmTorque0.05N.m+0.01N.m/6 wire
Frequency RateDC-1.5GHzInsertion Loss≤5dB
Insertion Loss Fluctuation≤+/-1.5dBReturn Loss/
SpecificationRG179Max Speed25rpm
VSWR≤3VSWR Fluctuation≤+/-1

Typical drawing

DHM025-4P-28S-3RF drawing

DHM025-4P-28S-3RF drawing


◆ Can be combine with 24 power rings or 48 common signal rings

◆ No maintenance

◆ Operating smoothly and reliability

◆ Extremely low electrical noise

◆ Convenient to assembly

◆ Light and compact

◆ Precious metal contact ensures long life-span

Typical applications

◆ Medical equipment

◆ VR equipment

◆ Electrical test equipment

◆ Indexing tables, Cable reels

◆ Robotics, rotary sensors, urgent illumination equipment

◆ Exhibit / display equipment

◆ CCTV pan

◆ Laboratory equipment


◆ Working speed

◆ Rated voltage

◆ Rated current

◆ No. of rings

◆ Connector

◆ Flange mounting

◆ Housing material

◆ Wire length

◆ Position of wire outlet, wire length

◆ Protection level (dust and water)

◆ Operating temperature

Model designation

name of HDMI slip ring

name of HDMI slip ring