Model 485HF9
Page 9
from figure 2.3 which illustrates the non-component side of the printed circuit board. When an
existing link is not needed, cut the copper tie with a craft knife or remove any solder bridge with
a desoldering tool, and make solder links as indicated for the required configuration. The pads
are placed close enough that a solder bridge can be easily made without using wire. Before
applying power to the Adaptor, inspect the changes carefully to ensure that the solder has
properly wetted the pads and that no other bridges have been made.
FIGURE 2.3
CONFIGURATION OPTIONS
EN
J2
GND
J3
J1
GND
VDC
B
A
A’
B’
Transmit Enable
External TXEN
Transmit Enable
RTS
Receive Echo
ON
Receive Echo
OFF
UNLINKED
COPPER
PAD PAIR
PADS WITH
SEVERED
LINK
PADS WITH
SOLDER
BRIDGE
KEY
PADS WITH
SEVERABLE
LINK
RX Line Terminator
IN
RX Line Terminator
OUT
J2
J1
J3
Summary of Contents for 485HF9
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