FloBoss 407 Instruction Manual
4-18 Rev 5/00
COM2 Terminal Block Signal Line Description
1 SPK Speaker
2 RI Ring indicator
3 RXD Receive data
4 SHUTDOWN Disable signal lines
5 TXD Transmit data
6 +5V 5-volt dc power
7 DTR Data terminal ready
8 DSR Data set ready
9 COM Common (power ground)
4.5 TROUBLESHOOTING AND REPAIR
There are no user serviceable parts on the communications cards. If a card appears to be operating
improperly, verify that the card is set up according to the information contained in Section 4.3, “Initial
Installation and Setup.” If it still fails to operate properly, the recommended repair procedure is to
remove and replace the card. The faulty card should be returned to your Fisher Representative for
repair or replacement.
Follow the procedures below to help ensure data is not lost and equipment is not damaged during
replacement of a communications card.
4.5.1 Replacing a Communications Card
If you are installing a communications card for the first time, refer to Section 4.3.1. To remove and
replace a communications card on an in-service FloBoss 407, perform the following procedure. Be sure
to observe the cautions to avoid losing data and damaging equipment.
NOTE
For a Measurement Canada FloBoss 407, resealing of the case must be performed
by authorized personnel only.
CAUTION
When repairing units in a hazardous area, ensure that the components selected are
labeled for use in such areas. Change components only in an area known to be non-
hazardous.
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