The 19 pin connector is used to carry power from lighting dimmer racks to lighting bars. This allows you to run 6 light channels through the female inline at one end of the multicore cable which plugs into the male chassis on the lighting bar. The 19 pin female inline extender with long body is on the left and the 19 pin male chassis on the right
At the other end of the cable a male inline plugs into the female panel mounts on the dimmer racks. It's important to note that the standard configuration in professional lighting applications is a male panel mount with coupling ring mated to the female inline without coupling ring as you can see above and below you will see a male inline with ring which mates with the female panel mount without ring.
	The 19 pin male inline plug with long body is on the left and the 19 pin female chassis on the right
Some other layouts from among our wide range of circulars are also in common use in the entertainment industry. A 7 pin configuration with 6*25 A + 1*50 A pins is used for motor controls. This allows you to carry both power and signal controls through a single connector.
	The 7 pin male inline plug is on the left and the 7 pin female chassis on the right
A 37 pin layout can be found on analog lighting controllers, 12 channel audio snakes, in TV studios etc. The male panel mount is on the right.