AT-JUNO-451-HDBT
29
Advanced Operation
1. Identify the DE-9 connector that will be attached to the control system or computer (DCE) equipment.
2. Remove the DE-9 connector at the opposite end of the cable with wire cutters.
3. Remove at least 1” of the cable insulation to expose each of the nine wires.
4. Locate a multimeter and set it to the “continuity” function.
5. Attach one of the leads from the multimeter to pin 2 on the DE-9 connector.
6. Take the other lead and probe each of the wires on the opposite end of the cable. When the wire connected to
that pin is detected, the multimeter will emit an audible tone. Once this occurs, identify the current wire, and
move it to the side.
7. Repeat step 6 for pin 3 and pin 5 on the DE-9 connector.
8. Group the remaining wires and pull them aside. Electrical tape can be use to secure the wires to the outside of
the RS-232 cable.
9. Remove at least 3/16” (5 mm) of insulation from the TxD, RxD, and GND wires.
Cable Assembly
When connecting a DTE device to a DCE device, a
straight-through
cable should be used. A straight-through cable
is wired in such a way that the pins on one side of the cable are connected to the corresponding pins on the opposite
side of the cable, as shown in the table below. However, the AT-JUNO-451-HDBT will use only TxD, RxD, and GND
signals when communicating with a control system or computer.
Pin
Signal
Signal
Pin
1
DCD
DCD
1
2
RxD
TxD
2
3
TxD
RxD
3
4
DTR
DSR
4
5
GND
GND
5
6
DSR
DTR
6
7
RTS
CTS
7
8
CTS
RTS
8
9
RI
RI
9
Straight-Through Cable
GND
TxD
RxD
10. Locate the included 4-pin captive screw block and open each of the terminals by
turning the screws counter-clockwise, using a small regular screwdriver.
11. Insert the TxD, RxD, and GND wires into correct terminal, as shown, and tighten the
screws to secure each wire. Do not overtighten.
12. Connect the captive screw connector to the
RS-232 / IR IN
port on the AT-
JUNO-451.
HDMI OUT
LAN
OPTICAL
RS-232
RX TX
S
IR IN
DC 5V
AT-JUNO-451-HDBT
INPUT
1
2
3
4
POWER
INPUT
FW
1
2
3
4
INPUT
AT-JUNO-451-HDBT
J
UNO
X
TM