Specifications

3. Strip the insulation on back about a quarter of an inch (0.6 cm) from

the ends of the twisted-pair wires, as shown below for a four-wire cable:

4A. Four-wire installation only: Connect one pair of wires to the two

terminal-block positions (poles) marked XMT (transmit). (In four-wire

applications, the Multi-Function Line Driver isn’t polarity-sensitive, so

you can connect either wire to either pole.) Connect the other pair of

wires to the two RCV (receive) poles. Ultimately, you will want to

construct a two-pair cable that is pinned this way:

XMT -------------------------------------- RCV

G ------Shield (optional) G

RCV -------------------------------------- XMT

4B. Two-wire installation only: Connect one wire to the one of the two

terminal-block positions (poles) marked XMT (transmit). Connect the

other wire to the other XMT position. Note the colors of the wires

attached to each position, because in two-wire applications the Multi-

Function Line driver is polarity-sensitive. When you wire the other MFLD

in Step 10, connect the other ends of the wires to the corresponding

XMT positions on the other MFLD. Ultimately, you will want to construct

a single-pair cable that is pinned this way:

XMT+ ------------------------------------- XMT+

XMT– ------------------------------------- XMT–

G -----Shield (optional) G

5. If you are using shielded cable, you can connect the shield to the “G”

(ground) position in the terminal block of one of the MFLDs. Do not

connect the shield to the ground positions of both MFLDs—this leaves

the system vulnerable to damage from ground loops. Note that a ground

wire is not necessary for the MFLDs to operate properly.

CHAPTER 4: Installation

One Pair