Black Box ME444A-530-R3, ME444AE-R3, ME445C-X.21, ME445C-35, ME444A-R3 manual Connecting Data Cables

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.

4.3.1POWER CONNECTION

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

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