The TSX SCP 114 PCMCIA card is connected to the Modbus bus using the TSX SCP CM 4030 link cable. This cable is connected to the branching device TSX SCA 50.
The cable of the PCMCIA card has bare wires at its ends which the user must connect to the terminal located inside the device.
Illustration:
NOTE: The length of the cable used (3 m), makes it possible to link a device to a TSX SCA 50 connection device located within a 3-meter radius of the card. This length ensures connection inside a standard cabinet
Description of the TSX SCP CM 4030 Cable
The 20-pin miniature PCMCIA connector supports the following signals:
NOTE:
On a Modbus bus you must:
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Polarize the line, in general in only one spot (usually on the master device) with 470 O resistors. Connect Pdw to D0 (D(A)) and Pup to D1 (D(B)).
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Adapt the line on the two end devices with a 150 O resistor between D0 and D1 (D1 is already connected internally via the card).
To connect a TSX SCP 114 card to a PLC Series 1000 (S1000), D1 must be connected to L-.
Connecting Modbus to TSX SCA 50 Device
Connection with no line terminator:
Connection of a SCA 50 with line terminator:
