User`s manual

T200 User's Manual SECTION 3: WIRING AND INSTALLATION
PAGE 3-86
3.18.2.1 Wiring an RS485 Connection
The connector pins on the Serial Port 9-way D-Type connectors on the front-panel of the drive are as follows:-
Pin Number Function
1 Reserved for future use
2 CAN-Low
3 CAN_GND
4
RS485+
5
RS485-
6 CAN_GND
7 CAN_High
8 DGND
9 V_EXTF
Table 3.12:- T200's RS485 Pinout on J2 and J3 (Same Pinout on both Connectors)
3.18.2.2 RS485 Adaptor for Conversion of RS232 to RS485
Recommended RS485 communication from a PC to a group of T200's is achieved by using an RS232/RS485 converter.
The RS232 side of the converter is connected to the selected communications port of the PC. The RS485 side of the
converter is connected to the drive via the RS485 port (J2) of the T200.
RS485 communication is achieved by interfacing a suitable RS232/RS485 adaptor between the PC and drive. See
Section 7 for recommendations on installing an RS485 interface with the WinDrive user interface
Adaptor Requirements
The following adaptor and cable requirements should be met by any adaptor that is used with Moog's WinDrive user
interface.
• Half Duplex Operation (Data Signals are both transmitted and received on two pairs wired in parallel (i.e. Tx/Rx (A)
= RS485+, and Tx/Rx (B) = RS485-).
• Method of Enabling of Transmitter of adaptor from the P.C. (e.g. use TxData line to enable adaptor transmission on
the RS485 line).
• Tx+ and Tx- Pull up/down resistors, (values depend on Adaptor used.).
• Screened twisted pair (nominal impedance 120 Ω).
• Cable end termination with user supplied 120Ω resistors.
In Half Duplex operation, the RS485 side of the adaptor must be able to enable its transmitter when the adaptor is ready
to transmit, and disable (i.e. tri-state) the transmitter when the adaptor is ready to receive. Some adaptors use the RTS
line from a PC' communications port as an enable signal to the transmitter. Other adaptors will implement the enabling
of the transmitter internally.
CAUTION:- The RS485 Cable shield MUST be connected to the metal body
of the D-Type connector, in order to provide a good galvanic connection
between the host computer and the T200 local signal ground. If this is not
done then RS485 communications may be subject to spurious interruptions.