Laurel Electronics LTS6 - Manual User Manual
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8. CHANGING JUMPER SETTINGS
E1
E4
E6
E3
E2
a
b
c
a
b
a b
c
d
a
b
c
d
Jumpers at E6 are used to set the input signal to RS232 or RS485. The factory default setting is
RS232, which allows direct connection to a PC. As an alternative to using jumpers, the selection of
half-duplex RS485 can also be achieved by externally connecting BTX to BRX and ATX to ARX. A
termination resistor can be selected if the transmitter is the last device on an RS485 line longer
than 200 feet (60 m).
Serial Signal
Duplex
Jumpers
Termination Resistor
Full
None
E6 a = Transmit
E6 c = Receive
RS485
Half
E6 b + d
E6 c
RS232
Full
None
None
Jumpers at E2 are used to select voltage or current output. For 4-20 mA or 0-20 mA current,
jumper E2 a + d. For 0-10V voltage, jumper E2 b + c. The factory default setting is current.
Jumpers at E3 and E4 are used with our counter transmitters to select an excitation output. This
capability does not apply to the serial input transmitter, which does not provide a signal
conditioner board.
Temporarily placing a jumper at E1 followed by power-up will reset communications to the
default values of 9600 baud, command mode, Custom ASCII protocol, and Address 1.