Patton electronic 1008 user manual Signal PIN#, Wiring for Multipoint Circuits, Star Topology

When connecting two Model 1008s, it is necessary to use a crossover cable. The diagrams below show how a crossover cable should be constructed for the following environments: 4-wire RJ-11, 4-wire RJ-45, 2-wire RJ-11 or 2-wire RJ-45.

	RJ-11 Cable (4-Wire)
SIGNAL	PIN#	PIN#	SIGNAL
GND†	1-----------------------	6	GND†
RCV-	2-----------------------	4	XMT-
XMT+	3-----------------------	5	RCV+
XMT-	4-----------------------	2	RCV-
RCV+	5-----------------------	3	XMT+
GND†	6-----------------------	1	GND†

†Connection to ground is optional

	RJ-45 Cable (4-Wire)
SIGNAL	PIN#	PIN#	SIGNAL
GND†	2-----------------------	7	GND†
RCV-	3-----------------------	5	XMT-
XMT+	4-----------------------	6	RCV+
XMT-	5-----------------------	3	RCV-
RCV+	6-----------------------	4	XMT+
GND†	7-----------------------	2	GND†

	RJ-11 Cable (2-Wire)
SIGNAL	PIN#	PIN#	SIGNAL
XMT+	3-----------------------	3	XMT+
XMT-	4-----------------------	4	XMT-
	RJ-45 Cable (2-Wire)
SIGNAL	PIN#	PIN#	SIGNAL
XMT+	4-----------------------	4	XMT+
XMT-	5-----------------------	5	XMT-

†Connection to ground is optional

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4.2 WIRING FOR MULTIPOINT CIRCUITS

The Model 1008 supports multi-point applications using either a star or daisy chain topology. Both topologies require special wiring, as well as specific DIP switch settings for master and slave units. Refer to Section 5.0 for multipoint DIP switch settings.

4.2.1 STAR TOPOLOGY

Using a star topology, you may connect several Model 1008s together in a master/slave arrangement. 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.

Figure 5 (below) shows how to wire the two-pair cables properly for a Model 1008 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 5. Star wiring for Model 1008 host and slaves

4.2.2 DAISY CHAIN TOPOLOGY

Using a daisy chain topology, you may connect several Model 1008s together in a master/slave arrangement. 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.

(Continued)

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