MultiChannel Wireless2100-System, Manual

Rear Panel of the MCS Interface Board 

Toggle Switch On / Off 

 
Toggle switch for turning the device on and off. The Wireless2100-System is switched to status "ON" 
when the toggle switch is switched to the left. The device is switched "OFF" when the toggle switch is 
switched to the right. If the Wireless2100-System is "ON", and the device is connected to the power line, 
the power LED on the front panel of the interface board should light up. If not, please check the power 
source and cabling. 
 

Power IN 

 
Connect the power supply unit here. This power supply powers both, the headstage and the interface 
board of the Wireless2100-System. The device needs 12 V and 2.5 A / 30 W. 
 

Ground 

 
If an additional ground connection is needed, you can connect this plug with an external ground using  
a standard 4 mm jack. 
 

Digital IN / OUT 

 
A Digital IN / OUT for 16 digital in- and output bits is available (68-pin MCS standard connector). Please 
read chapter "Pin Layout" (Digital IN / OUT Connector) in the Appendix for more information about the 
pin layout of the connector. The Digital IN / OUT connection accepts or generates standard TTL signals. 
TTL stands for Transistor-Transistor Logic. A TTL pulse is defined as a digital signal for communication 
between two devices. A voltage between 0 V and 0.8 V is considered as a logical state of 0 (LOW),  
and a voltage between 2 V and 5 V means 1 (HIGH). 
 
The Digital OUT allows generating a digital signal with up to 16 bits and read it out, for example, by  
using a Digital IN / OUT extension Di/o from Multi Channel Systems MCS GmbH. You can utilize this 
digital signal to control and synchronize other devices with the Wireless2100-System. Bit 0 to 3 of the 
Digital OUT are separated and available as Lemo connector DIG OUT 0 to 3 on the front panel of the 
interface board. So if you need only one, two, three or four bits of the digital signal, you don’t need the 
additional Di/o.  
 
The Digital IN can be used to record additional information from external devices as a 16 bit encoded 
number. The Digital IN is most often used to trigger recordings with a TTL signal. The 16 bit digital input 
channels is a stream of 16 bit values. The state of each bit (0 to 15) can be controlled separately. Standard 
TTL signals are accepted as input signals on the digital inputs. Unused input bits, which have an undefined 
state, should be masked in the "Trigger Detector" of MC_Rack. 
 

Warning: A voltage that is higher than +5 Volts or lower than 0 Volts, that is, a negative voltage, applied 
to the digital input would destroy the electronics. Make sure that you apply only TTL pulses (0 to 5 V) to 
the digital inputs.