PlexBright Dual LED + 16 Channel Commutator

The mixed-mode PlexBright Dual LED + 16 Channel Commutator is ideal for experiments in which optogenetic stimulation is performed simultaneously with neural recording using analog headstages.

This commutator has a light-weight, low-torque, passive design that supports optogenetic experiments requiring one or two LEDs with animals as small as mice. This innovative device uniquely incorporates 21 lines supporting up to 16 channels of neural data transmission.

This is the commutator to choose if combining optogentics with a low channel count:

  • OmniPlex® D System utilizing either a DigiAmp™ or MiniDigi™ Digitizing Amplifier,
  • OmniPlex System utilizing an analog amplifier, or even
  • The original MAP system

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


FeaturesPlexBright Dual
LED Commutator
PlexBright Dual LED + 16 Channel Commutator Carousel CommutatorMotorized Carousel CommutatorDual LED + Fluid Swivel CommutatorRemarks
Optical Channels22222 (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)– OmniPlex System utilizing a Digital Headstage Processor (DHP)– OmniPlex System utilizing a Digital Headstage Processor (DHP)
Headstage compatibilityn/a1 analogUp 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)n/a
Total lines425 20401 fluid
LED module compatibilityPlexBright CompactPlexBright CompactPlexBright CompactPlexBright CompactPlexBright Head-Mounted
LED module attachment baseMagneticMagnetic MagneticMagnetic2 Pin electrical connectorThe newer magnetic attachment bases replace the previous screw-attachment bases.
Number of mountable LEDs1 or 21 or 2 1 or 21 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 pairs2 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 1.0A1.0A0.3A
Actuation mechanismPassivePassive PassiveMotorized 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 connectors2 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 connectorTwo-pin socket connectorTwo-pin socket connectorMates with the two-pin connector on PlexBright Compact LED Modules.
Electrical channel input connectorn/aHarwin connector Harwin 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)
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)
(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
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 Cable PlexBright 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