Smart Star User's Manual

> ## Appendix A. Field Wiring Terminals

> Appendix A explains how to prepare the connector on an I/O card to accept a field wiring terminal, and how to secure the field wiring terminal to the I/O card. The dimensions for the field wiring terminals are included.

> ### A.1 Selecting and Installing a Field Wiring Terminal

> Connections to the I/O cards are made via a ribbon cable connector or optional field wiring terminals that are either pluggable or have screw terminals. Three different Field Wiring Terminals (FWTs) are available. Table A-1 lists the I/O cards and the Z-World part numbers for the corresponding FWTs.

> Table A-1. Guide to FWT Selection
> FWT Description | I/O Cards | Z-World Part Number
> Pluggable Terminals | Screw Terminals
> FWT27 | Digital I/O (SR9200 series) | 101-0420 | 101-0424
> FWT18 | A/D Converter (SR9300 series) D/A Converter (SR9400 series) Relay (SR9510) | 101-0421 | 101-0425
> FWT18R | Relay (SR9500) | 101-0422 | 101-0426

> Before you can install the FWT you selected for your I/O card, you must remove the tabs from the connector on the I/O card. To do so, move the tab inwards as far as possible, as shown in Figure A-1. Then insert a screwdriver into the space below the tab on the side of the connector and gently nudge the tab up and out. If you are careful, the tab will remain intact to be saved and snapped back in place should you need to use a ribbon cable connector in the future.

> Figure A-1. Remove Tabs from Connector
> on I/O Card

> Plug the FWT connector into the connector on the I/O card. Be sure to position the pluggable or screw connectors so that the edge of the FWT they are on faces outwards from the I/O card as shown in Figure A-2. Position the mylar insulator above the FWT as shown in Figure A-2 to protect the header pins on the printed circuit board, and secure the FWT using the two 4-40 × ¼ screws supplied.

> Figure A-2. Secure FWT to I/O Card

> ### A.2 Dimensions

> Figure A-3 shows the overall FWT dimensions.

> Figure A-3. FWT Dimensions

> NOTE | All diagram and graphic measurements are in inches followed by millimeters enclosed in parentheses.

> The actual appearance of the terminals may vary, depending on the number and type of terminals. The pinouts for the FWTs applicable to a particular I/O card are shown with the pinouts for the connectors on the individual I/O cards.

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