Alicat BB9 - Manual (Page 7)

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7. To test that the address has been accepted, type the new address followed by the
Enter key. The computer should respond with the new address followed by one line
of data.
8. Put some sort of external label on the device that denotes its address. If you forget
the device’s address, you will have to check the device individually (with all other
units disconnected).
9. Remove the device from the Multi-Drop Box and connect the next device to be
addressed. Repeat until all of the units have a unique address.
Daisy Chaining Multi-Drop Boxes For More Devices
Up to 26 flow and/or pressure devices can be attached to a single RS-232 port by cabling
up to four Multi-Drop Boxes together. Valid RS-232 addresses for our flow and pressure
instruments are the 26 letters of the alphabet, A-Z.
To daisy chain Multi-Drop Boxes when only metering and/or gauging devices are being
used, simply use a double ended DC-62 type 8 pin mini-DIN (or 6 pin Locking Industrial)
cable to connect any port on one box to any port on another.
To daisy chain Multi-Drop Boxes when controlling devices are being used, use a double
ended DC-62 type 8 pin mini-DIN (or 6 pin Locking Industrial) cable to connect any port
on one box to any port on another. It is also necessary to daisy chain additional wires of
sufficient gauge (to power the extra units) between the power and ground sockets on the
terminal blocks of the Multi-Drop Boxes.
CAUTION: Failure to provide proper wire gauge for the expected load between
boxes may result in damage and possible fire!