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CHAPTER 4: Installation
4.3 Connecting Data Cables
After you set the standalone line driver’s internal controls, it’s ready to be cabled
for operation.
Its electrical connectors are located on its rear panel. These consist of a female
V.35 interface connector labeled “DTE,” a 5-screw terminal block, and an IEC 320
AC inlet that contains an integral fuse compartment.
The V.35 interface connector, a 34-pin M-block female, carries input/output data,
clock signals, and control signals between the line driver and the DTE or DCE
(refer to Table 4-4).
The terminal block has five screws for connecting transmit and receive lines—the
transmit pair where XMT is indicated (for data output from the unit), the receive
pair where RCV is indicated (for data input to the unit), and a drain wire from the
cable shield, if you are using shielded cable, where GND is indicated. The XMT
and RCV pairs are not sensitive to polarity.
Connect power and data cables to the line driver as described in the following
subsections.
4.3.1 P
OWER
C
ONNECTION
The power connection provides AC voltage to the line driver.
To make this connection on the 115-VAC (ME444A-R3) models, first attach the
IEC 320 female outlet of the included power cord to the IEC 320 male inlet on the
standalone line driver’s rear panel.
To make this connection on the 230-VAC (ME444AE-R3) models, first attach the
IEC 320 female outlet of an appropriate power cord to the IEC 320 male inlet on
the standalone line driver’s rear panel. (This power cord must have a plug on the
other end that will fit the site’s mains outlets.)
WARNING!
BEFORE PLUGGING THIS UNIT INTO AN OUTLET OR OTHER LIVE
POWER SOURCE, make sure its protective earth contact is connected to
the protective conductor of the (mains) power cord. The mains plug
must be inserted only in a socket outlet provided with a protective earth
contact. The protective action must not be negated by use of an
extension cord (power cable) without a protective (grounding)
conductor.
If the line driver’s fuse blows (opens), make sure that you replace it only with a