Delta MMC120 - Manual (Page 18)

Preparing For Installation MMC120 Linear Motion Control Module
18 Delta Computer Systems, Inc. 360/254-8688
PREPARING FOR INSTALLATION
Wiring Notes
Use shielded twisted pairs for all connections to inputs and outputs. Route the transducer wiring separate from
other wiring.
You must provide the power supplies needed for your transducers.
Drive Outputs
When wiring the system, it is important that the drive extends and transducer counts increase when a positive
voltage is sent to the drive. The extend direction is defined as the direction that causes the transducer to return
increasing counts. The extend direction of a magnetostrictive transducer is away from the head.
Magnetostrictive Transducer Wiring
NOTE: The following example schematics do not include transducer pin numbers, color codes, or power supply
requirements, since these vary among different transducers. To determine your power supply needs and
connector pinouts or cable color codes, consult your transducer documentation.
The MMC120 can interface to transducers with either single-ended (TTL) or Differential Line Driver (RS-
422) interrogation and return signals. With RS-422 signals, connect both the '+Int' and '-Int' between the
transducer and the MMC120 for the interrogation signal, and connect both the '+Ret' and '-Ret' between the
transducer and the MMC120 for the return signal. Connect the transducer DC ground to MDT Common.
For single-ended transducer with positive interrogation, connect the transducer '- interrogation in' wire to the
MDT Common pin and the transducer '+ interrogation in' wire to the '+ Int' pin. CONNECT NOTHING TO
THE '- INT' PIN OF THE MMC120. Connect the transducer return plus wire to the '+' return pin on the
MMC120 and the transducer return common wire to MDT Common on the MMC120. CONNECT
NOTHING TO THE '- RETURN' PIN OF THE MMC120.