Delta RMC151 - Manual (Page 1157)

10 Wiring and Installation
23 n/c n/c No connection
24 EnOut- EnOut- Enable Output (12-24
VDC)
Drv: white/orange
25 EnOut+ Enout+ Drv: orange/white
Encoder Wiring
Quadrature Encoders
The QAx module A, B, and Z inputs accept only Differential Line Driver (RS-422) signals.
Single-ended line drivers (TTL) are not supported due to low noise immunity. The user
must supply power for the encoder.
The Cmn on the QA module must be connected to the encoder, or the signals will not be
read correctly!
Daisy-Chaining A and B Quadrature Inputs
One quadrature encoder can typically output its signals to multiple QA modules. Use a
daisy-chain topology, and add termination only to the last input. Incorrect termination will
result in distorted signals and will cause incorrect transducer readings. Use the Input
Termination Axis Parameter to set the termination. Termination is selectable on the A and
B signals. The Z signal is always terminated with 120 Ω.
RegX/PosLim, RegY/NegLim, and Home Inputs
The Reg/Lim and Home inputs are compatible with signal levels from 12 to 24 V. They
draw 2.7 mA max and turn on when the voltage across the input is greater than 6 V. The
polarity is unimportant.
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