Patton electronic MODEL 1012AR Connection to the 4-WIRE Interface, POINT-TO-POINT Connection

4.2 CONNECTION TO THE 4-WIRE INTERFACE

The Model 1012AR offers RJ-11 and RJ-45 options for connection of the 4-wire data line. The signals/pins used are shown below:

RJ-11	SIGNAL		RJ-45		SIGNAL
1 ------------	GND†		1 -----------		N/C
2 ------------	RCV-		2 -----------		GND
3 ------------	XMT+		3 -----------		RCV-
4 ------------	XMT-		4 -----------		XMT+
5 ------------	RCV+		5 -----------		XMT-
6 ------------	GND		6 -----------		RCV+
			7 -----------		GND
			8 -----------		N/C
†Connection to ground is optional
	1	- Blue		1	- Blue
				2	- Orange
	2	- Yellow		3	- Black
	3	- Green		4	- Red
	4	- Red		5	- Green
	5	- Black		6	- Yellow
	6	- White		7	- Brown
				8	- Slate

4.2.1 POINT-TO-POINT CONNECTION

When installing two Model 1012AR units in a point-to-point appli- cation, the cable between them should be a crossover cable, as shown in the following chart. The color/pin number correlations below corre- spond to AT&T’s wiring standard for RJ-11 connectors.

SIGNAL	PIN#	COLOR	COLOR	PIN#	SIGNAL
GND†	1	Blue‡ --------------	White	6	GND
RCV-	2	Yellow ------------	Red	4	XMT-
XMT+	3	Green ------------	Black	5	RCV+
XMT-	4	Red ---------------	Yellow	2	RCV-
RCV+	5	Black -------------	Green	3	XMT+
GND	6	White -------------	Blue	1	GND

†Connection to ground is optional

‡Standard color codes—yours may be different

4.3 MULTIPOINT CONNECTION

The Model 1012AR supports multi-point applications using either a star or a daisy chain topology. together in a master/slave arrange- ment. Maximum distance between the units will vary based upon the number of drops, data rate, wire gauge, etc. Call Technical Support for specific distance estimates. In both topologies, the master unit should be set to “transmitter constantly on” (strap removed), and the slaves should be set to “transmitter controlled by RTS” (strap in place).

4.3.1 STAR TOPOLOGY

Figure 4 (below) shows how to wire the two-pair cables properly for a Model 1012AR star topology. Note that the ground connection is not needed

HOST FIRST SLAVE SECOND SLAVE

XMT+RCV+

RCV+

XMT-RCV-

RCV-

RCV+XMT+

XMT+

RCV-XMT-

XMT-

Figure 4. Star wiring for Model 1012AR host and slaves

4.3.2 DAISY CHAIN TOPOLOGY

Figure 5 (below) shows how to wire the two-pair cables properly for a Model 1012AR daisy-chain topology. Note that the ground con- nection is not needed.

HOST	FIRST SLAVE	OTHER SLAVE(S)
XMT+	RCV+	RCV+
XMT-	RCV-	RCV-
RCV+	XMT+	XMT+
RCV-	XMT-	XMT-

Figure 5. Daisy chain wiring for Model 1012AR host and slaves

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