Patton electronic 1000S user manual Xmt + Rcv+, Rcv Xmt Rcv + Xmt+

1.Open the unit by gently inserting a screwdriver between the DB-25 connector and the lip of the plastic case (see Figures 4 and 5, below). You don't have to worry about breaking the plastic, but be careful not to bend the D-sub connector.

Figure 4: How to Use a Small Flathead Screwdriver to Begin to Open the Model 2070 Case

Figure 5: How to Use a Small Flathead Screwdriver to Finish Opening the Model 2070 Case

Once the unit has been opened, you will be able to see the terminal blocks located at the rear of the PC board.

2.Strip the outer insulation from the twisted pairs about one inch from the end as shown in Figure 6.

Figure 6: Stripping the Outer Insulation from the Twisted Pair

3.Strip the insulation on each of the twisted pair wires about .25" as shown in Figure 7.

Figure 7: Stripping the Insulation from Each Twisted Pair

4.Connect one pair of wires to XMT+ and XMT- (transmit positive and negative) on the terminal block, making careful note of which color is positive, and which color is negative.

5.Connect the other pair of wires to RCV+ and RCV- (receive positive and negative) on the terminal block, again making careful note of which color is positive and which color is negative.

XMT +		RCV+	} One Pair
XMT -		RCV -
G	To Shield (Optional)	G	} One Pair
RCV -		XMT -
RCV +		XMT+

6.If there is a shield around the telephone cable, it may be connected to "G" on the terminal block. To avoid ground loops, we recommend connecting the shield at one end only. A ground wire is not necessary for proper operation of the Model 1000.

7.When you finish connecting the wires to the terminal block, the assembly should resemble the diagram in Figure 8, below:

+RCV- G -XMT+

Figure 8: Proper Twisted Pair Connections to the Model 1009 Terminal Blocks

7 8