Carousel Commutator Designed for NeuroLight Optoelectrodes

The Carousel Commutator R2S2-Vertical is ideal for experiments in which optogenetic stimulation is performed simultaneously with neural recording using digital headstages and the NeuroLight Optoelectrode.

The Carousel Commutator R2S2-Vertical has a light-weight, low-torque, passive design that supports optogenetic experiments using NeuroLight Probes with 12 or 32 µLEDs. The commutator can be used with animals as small as mice.


  • This commutator can accommodate one digital recording headstage, yielding up to 128 channels of neural recording
  • This commutator can accommodate one digital stimulating headstage, allowing digital stimulation up to 32 channels
  • Designed to integrate Omniplex and the NeuroLight Optoelectrode

Integration Schematic

The diagram illustrates the hardware needed for integrating the OmniPlex® Neural Recording Data Acquisition System with the NeuroLight Stimulator System. A Plexon Sales Engineer is happy to discuss your needs and help your lab set up a neural recording and optogenetic experimental paradigm.
















The table below provides many of the most commonly requested specifications.


FeaturesPlexBright Dual
LED Commutator
PlexBright Dual LED + 16 Channel Commutator Carousel CommutatorCarousel Commutator R2S2-VerticalMotorized Carousel CommutatorDual LED + Fluid Swivel CommutatorRemarks
Optical Channels222n/a; LEDs on NeuroLight Probe22 (Head-Mounted LED)
Plexon data acquisition system compatibilityNone
– OmniPlex® D System utilizing either a DigiAmp™ or MiniDigi™ digitizing amplifier,
– OmniPlex System utilizing an analog amplifier, or
– MAP System
– OmniPlex System utilizing a Digital Headstage Processor (DHP)– OmniPlexSystem utilizing a Digital Headstage Processor (DHP)– OmniPlexSystem utilizing a Digital Headstage Processor (DHP)– OmniPlex System utilizing a Digital Headstage Processor (DHP)
Headstage compatibilityn/a1 analogUp to 2 digitalUp to 2 digitalUp to 4 digitaln/a
Electrical channelsn/a16Depends on channels per headstage (up to 64 channels with any combination of 16 or 32 channel headstages)One digital recording up to 128 ch, one digital stimulation up to 32 channelsn/a
Total lines425 2028401 fluid
LED module compatibilityPlexBright CompactPlexBright CompactPlexBright CompactCompatible with NeuroLight OptoElectrode PlexBright CompactPlexBright Head-Mounted
LED module attachment baseMagneticMagnetic Magneticn/aMagnetic2 Pin electrical connectorThe newer magnetic attachment bases replace the previous screw-attachment bases.
Number of mountable LEDs1 or 21 or 2 1 or 2n/a; LEDs are on NeuroLight Probe1 or 21 or 2Mixed-mode commutators can be used for nerual recording only, not requiring the simultaneous use of LED modules.
LED control signal lines2 pairs2 pairs 2 pairsn/a2 pairs2 pairsUsing a PlexBright Series-Y BNC cable, both mounted PlexBright LED Modules can be simultaneously controlled with the same control signal as for bilateral experiments.
Maximum current per LED channel1.0A1.0A 1.0An/a; Current Controlled by the NeuroLight Stimulator1.0A0.3A
Actuation mechanismPassivePassive PassivePassiveMotorized torque armPassiveA light-weight, low torque design allows for passively driven rotation even with small animals.
Input connectors from LED controller/driver2 BNC connectors2 BNC connectors 2 BNC connectorsDigital Stimulating Headstage Cable2 BNC connectors2 BNC connector tethersInput power/control signals from the PlexBright 4 Channel Optogenetic Controller or PlexBright LD-1 Single Channel LED Driver.
Output connectors to LEDTwo-pin socket connectorTwo-pin socket connector Two-pin socket connectorDigital Stimulating HeadstageTwo-pin socket connectorTwo-pin socket connectorMates with the two-pin connector on PlexBright Compact LED Modules.
Electrical channel input connectorn/aHarwin connector Harwin connectorHarwin connectorHarwin connectorn/a
Commutator dimensions (W x H x D)76.2 x 50.8 x 50.6mm
(3.0 x 2.0 x 2.5 inches)
101.6 x 114.3 x 76.2mm
(4.0 x 4.5 x 3.0 inches)
101.6 x 114.3 x 76.2mm
(4.0 x 4.5 x 3.0 inches)
101.6 x 114.3 x 76.2mm
(4.0 x 4.5 x 3.0 inches)
180 x 280 x 127mm
(7.1 x 11.0 x 5.0 inches)
63.5 x 53.3 x 63.5mm
(2.5 x 2.1 x 2.5 inches)
Height below mounting plate20.3mm
(0.8 inches)
(2.0 inches)
(1.22 inches)
(1.22 inches)
(8.0 inches)
0.7 inches
OD below mounting plate63.5mm diameter
(2.5 inches)
Recommended cut-out
63.5mm diameter
(2.5 inches)
Recommended cut-out
76.2mm diameter
(3.0 inches)
Recommended cut-out
50.8mm diameter
(2.0 inches)
Recommended cut-out
114mm diameter
(4.5 inches)
Recommended cut-out
44.5mm diameter
(1.75 inches)
Recommended cut-out
Commutator weight0.14kg
AccessoriesPlexBright Series-Y BNC CablePlexBright Series-Y BNC Cable PlexBright Series-Y BNC CableClip on Torque ArmPlexBright Series-Y BNC CableClip onTorque ArmThe PlexBright Series-Y BNC Cable enables the simultaneous operation of two PlexBright LED Modules from a single channel in which identical parameters are desired for both modules.

If you have further questions, a Plexon Sales Engineer will be happy to help.

Technical Specs and Data Sheets