Measurement Computing WBK17 User Manual
Page 27
WBK17, Counter/Encoder Module
987996
WBK17, pg. 27
Wiring for 3 Encoders
The following figure illustrates single-ended connections for three encoders. For differential connections
we would simply make /A, /B, and /Z signal connections to the respective channel slots. With three
encoders it should be noted that there is no separate channel for a third set of Z, /Z signals; thus, in the
following figure Encoder 3 has no Z signal.
The WBK17 can receive input from up to four encoders; however, the WaveView data
acquisition program can accept input from only one or two encoders. To receive input
from three or four encoders [with one WBK17] refer to the Programmer’s Manual
(p/n 1008-0901).
Three Encoders with Single-Ended Connections to WBK17
Connect three encoders to the WBK17 as shown in the table below. Each signal (A, B) can be connected
as a single-ended connection with respect to the common ground or as a true differential input. All three
encoders can draw their power from the power output connector. Connect the encoder’s power input to the
+5V or +15V power, connect the return to COM on the same connector. Make sure that the current output
spec is not violated or a fuse may blow. The programming setup given below is just a representative of
possible options.
Three Encoders – Example Setup
Channel
Connection
Programming Setup
1
Encoder1 – A
Encoder Mode, 1X option, 16-bit counter, Latch on SOS
2
Encoder1 – B
Period Mode, 1Xperiod option, 16-bit counter, Map channel doesn’t gate,
Ticksize to 20000ns
3
Encoder2 – A
Encoder Mode, 2X option, 16-bit counter, Latch on SOS
4
Encoder2 – B
Period Mode, 1Xperiod option, 16-bit counter, Map channel doesn’t gate,
Ticksize to 2000ns
5
Encoder3 – A
Encoder Mode, 4X option, 16-bit counter, Latch on SOS
6
Encoder3 – B
Period Mode, 1Xperiod option, 16-bit counter, Map channel doesn’t gate,
Ticksize to 200ns
7
Encoder1 – Z
Counter in Totalize mode, stop-at-the-top, 16-bit counter
8
Encoder2 – Z
Counter in Totalize mode, stop-at-the-top, 16-bit counter