Blackbox PI320A-R3, Manual, Page: 9 / 22

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CHAPTER 3: Installation
Before you begin, make sure all equipment is off and the Extenders are not
powered on.
3.1 Serial Extenders
In serial-to-serial applications, use the charts on page 11 to set switch S2 for
baud rate, transmission speed, and termination. Set S1 for either DCE to
connect to a PC, or DTE to connect to a modem. Attach the two devices
with appropriate cable. All connections are straight-through: pin 1 to pin 1,
pin 2 to pin 2, etc. Once all connections are made, connect DB25 cables to
the equipment and power up the converters. Now power can be applied to
your equipment.
For testing purposes, a self-test has been incorporated into the serial
converter. To enable the test, S2-4 needs to be placed in the up (open)
position. When this is done, the self-test will be transmitted to the serial
port. If a PC is the receiving device, a terminal-emulation program will
need to be running.
3.1.1 C
ONNECTORS
J1—DC Power Jack (9 VDC @ 500 mA)
3. Installation
J2
S2
S1
A
J3
B
J1
J4