Serial port, Connector information – Delta MMC120 User Manual
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