Rack Mount Option Card Installation - GE DigitalFlow GS868 Service Manual

B.4 Rack Mount Option Card Installation

The Model GS868 flowmeter can accommodate up to six option cards in a manner similar to that used in a PC. The

option cards are installed into sockets on the printed circuit board, and they are held in place with a metal bracket. A

single metal bracket is used to secure all the installed option cards.

Note: If the Model GS868 presently has no option cards installed, be sure to purchase the metal mounting bracket

along with the first option card.

Refer to Figure 11 on page 54 and complete the following steps:

1. After disconnecting the main power to the meter, remove the top panel from the enclosure by removing the four

screws indicated.

WARNING! The main power to the Model GS868 must be disconnected before proceeding.

2. If one or more option cards are already installed, remove the four fasteners that secure the metal bracket to the

printed circuit board. Lift the metal bracket straight up and away from the printed circuit board.

Note: The fasteners may be either plastic snap rivets or metal hardware (in some older meters). In either case, they

may be discarded, as new plastic snap rivets will be provided.

3. There are six 32-pin option card sockets (

on the rear panel, remove the appropriate option slot cover to make room for the external connector on the new

option card.

4. To install the option card, insert its 32-pin connector into the chosen option card socket and gently press the card

into place. Make sure that the pins in the connector are straight and properly aligned with the socket and that the

option card is oriented with its external connector positioned in the opening on the rear panel.

CAUTION!

5. Repeat steps 3 and 4 to install any additional option cards.

6. Place the metal bracket over the option cards, making sure that all installed option cards are inserted into the plastic

card guides in the bracket. The bracket must be oriented so that the six card guides are directly above the six

sockets on the printed circuit board (do not install the bracket rotated 180° out of position). Secure the metal

bracket to the printed circuit board with the four plastic snap rivets provided.

7. After checking for any loose hardware that may have fallen into the enclosure, reinstall the top panel on the meter

and secure the panel in place with the four screws previously removed.

The Model GS868 flowmeter may now be placed back into service. Reconnect the main power and refer to Appendix

C, Optional Enclosures, of the Startup Guide for instructions on wiring the new option card(s).

Note: Be sure to record the option card installation in Appendix A, Service Record.

DigitalFlow™ GS868 Service Manual

J41–J46

) on the rear of the printed circuit board. By removing the screw

Do not force the option card into the socket. If the card does not enter the socket

easily, check for and straighten any bent pins in the connector and try again.

Appendix B. Optional Enclosures

47