Omega OMB-DAQBOARD-3000 Benutzerhandbuch

The following figure illustrates single-ended connections for two encoders.  Differential connections are 
not applicable. 

 

 

* Connections can instead, be made to the associated screw-terminals of a connected TB-100 terminal 

connector option. 

 

Connect two encoders to the 3000 Series board as shown in the table below.   Each signal (A, B) can be 
connected as a single-ended connection with respect to the common digital ground (GND).  Both encoders 
can draw their power from the +5V power output (pin 19) on the 68-pin SCSI connector. 

Connect each encoder’s power input to +5V power.  Connect the return to digital common (GND) on the 
same connector.  Make sure that the current output spec is not violated.  The programming setup given 
below is just a representative of possible options. 

Pin 5 

(CTR0) 

Encoder #1 – A 

Encoder Mode, 1X option, 16-bit counter, Latch on SOS 

Pin 39 

(CTR 1) 

Encoder #1 – B 

Period Mode, 1Xperiod option, 16-bit counter, Map channel doesn’t gate, 
Ticksize to 20833 ns 

Pin 4 

(CTR2) 

Encoder #2 – A 

Encoder Mode, 2X option, 16-bit counter, Latch on SOS 

Pin 38 

(CTR3) 

Encoder #2 – B 

Period Mode, 1Xperiod option, 16-bit counter, Map channel doesn’t gate, 
Ticksize to 2083.3 ns 

 

With the encoders connected in this manner there is no relative positioning information available on 
encoder #1 or #2 since there is no Z signal connection for either.  Therefore only distance traveled and 
velocity can be measured for each encoder. 

   

5-20   Counter Input Modes  

918494 

DaqBoard/3000 Series User’s Manual