Delta MMC120 User Manual download pdf (Page 20)

Preparing For Installation MMC120 Linear Motion Control Module

20 Delta Computer Systems, Inc. 360/254-8688

Serial Port

The communication cable attached to the serial port is a potential source of electromagnetic radiation from the

MMC120. To minimize radiation, use a well-shielded cable which is as short as possible. Route it out the

bottom of the module and against the back panel.

Connector Information

Transducer interface: Nine Pin Plug-in Terminal Block

Pin Function

1 Axis 1 + Interrogation

2 Axis 1 - Interrogation

3 Axis 1 + Return

4 Axis 1 - Return

5 MDT Common

6 Axis 2 + Interrogation

7 Axis 2 - Interrogation

8 Axis 2 + Return

9 Axis 2 - Return

NOTE: The transducer interface can be used with either differential (RS-422) or single-ended (TTL) transducer

signals. For an RS-422 transducer, connect both the '+Int' and '-Int' between the transducer and the

MMC120 for the interrogate 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 a positive interrogation, single-ended transducer, 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.

For a negative interrogation, single-ended transducer, 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.

Drive Output: Three Pin Plug-in Terminal Block

Pin Function

1 Axis 1 Drive

2 Drive Common

3 Axis 2 Drive

Serial Port:DB-9

Pin Function

2 Receive

3 Transmit

5 Common

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Delta MMC120 User Manual Page 20