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SE C T IO N 2 .3
Available Communications Cables/Converters
To simplify the wiring and connection process IMS offers a USB to RS-422 communications cable for the MForce Mi-
croDrive. This convenient 12.0' (3.6m) accessory cable connects a PC's USB Port to the MForce MicroDrive P2 Connec-
tor. An in-line RS-422 converter enables parameter setting to a single MForce MicroDrive. Cable purchase recommended
with first orders.
USB to 10-Pin IDC .................................................Part No. MD-CC400-000
10-Pin IDC to Wire Crimp Adapter ........................Part No. MD-ADP-H
For more information on these cables please reference Appendix D: Optional Cables and Cordsets.
Interfacing Single Mode Communications
The MForce MicroDrive communicates to the host using the RS-422/485 protocol. Communications may be configured
as either half duplex (RS-485) or full duplex (RS-422) using the EM (Echo Mode) Instruction. RS-422/485 may be used
in two ways: either to communicate to a single MForce MicroDrive, or to address up to 62 individually named MForce
MicroDrive nodes in a multidrop system.
Single Mode Communications Full Duplex (RS-422)
To interface the MForce MicroDrive using RS-422 protocol you will need one of the following:
A PC equipped with RS-422 Interface.
A PC RS-232 to RS-422/485 Converter.
The USB to RS-422 accessory cable.
Use the following diagram to connect RS-422 communications to the MForce MicroDrive.
COMM GND is ONLY to be used for grounding
communications. Grounding Aux-Logic or
any other device to COMM GND may
damage the MForce!
Comm. Ground Loops
RS-422
Host PC
Converter
USB/Serial Port
Part 2: Connections and Interface
P2
COMM GND
100Ω Internal on
MForce to Prevent
COMM GND
TX-
TX+
RX-
RX+
Figure 2.3.1: Full Duplex Communications (RS-422)
Interfacing Communications
MForce MicroDrive
RX+
TX+
TX-
RX-
10-Pin IDC at P2 Shown
See Specifications for Pin
Numbering for the
Wire-Crimp version.
Note: See the
Specifications
Section of
this document
specific to the MForce
MicroDrive model you
purchased for detailed
connector and pin
information.
WARNING!
Do not
connect or
disconnect
the Communications
Converter Cable while
power is applied!
WARNING!
If using AUX-
Logic, the
Power return
MUST be connected
to the Motor Power
Ground. DO NOT
connect the return
to Communications
Ground!
2-13
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