Aalborg I/O-485 - Manual (Page 7)

The power input is protected by a 1A re-settable fuse. If a shorting con-
dition or polarity reversal occurs, the fuse will cut power to the flow trans-
ducer circuit. Disconnect the power to the unit, remove the faulty condi-
tion, and reconnect the power. The fuse will reset once the faulty condi-
tion has been removed.
e.2 Jumper Assignments
JP1 - Program mode jumper
Pins 1 and 2 select Run mode
Pins 2 and 3 select Program mode
JP3 - Input mode jumper
Pins 1 and 2 select 0 - 5VDC mode (factory default)
Pins 2 and three select 4 - 20 mA mode
JP2, JP4, JP5 - Output mode jumpers
Pins 1 and 2 select 0 - 5VDC mode (factory default)
Pins 2 and 3 select 4 - 20mA mode
(f) PROGRAMMING
Programming the module allows the user to set the communications baud
rate, module address and, whether to use error checking. Note that the
address is included only for compatibility with the RS-485 version of this unit.
Connect a dumb terminal or PC running a communications program,
such as Procomm, to the unit.
RS232 APPLICATION:
Connect the unit TX line to the terminal RX line, connect the unit RX line
to the terminal TX line. Connect the I/O GND (pin 8) to SG Terminal.
4
CAUTION: Make sure power is OFF when connecting or
disconnecting any cables in the system.
ƽ
CAUTION: Improper setting of jumpers may result in incorrect
operation of the unit and could cause damage to the connected
equipment. ƽ
Note: All I/O conditioners are programmed on the factory by
default settings: address 1, baud rate 9600, and error checking
OFF.