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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