Omega OMB-DAQBOARD-3000 Series User Manual page 68

Wiring for 2 Encoders
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.
Two Encoders – Programming Example Setup
SCSI Pin
Pin 5
(CTR0)
Pin 39
(CTR 1)
Pin 4
(CTR2)
Pin 38
(CTR3)
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
Two Encoders Connected to pins on the SCSI Connector*
Connects to: Example Programming Setup
Encoder #1 – A Encoder Mode, 1X option, 16-bit counter, Latch on SOS
Encoder #1 – B Period Mode, 1Xperiod option, 16-bit counter, Map channel doesn't gate,
Ticksize to 20833 ns
Encoder #2 – A Encoder Mode, 2X option, 16-bit counter, Latch on SOS
Encoder #2 – B Period Mode, 1Xperiod option, 16-bit counter, Map channel doesn't gate,
Ticksize to 2083.3 ns
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DaqBoard/3000 Series User's Manual