Patton electronic 1070 Wiring for Multipoint Circuits, Daisy Chain Topology, Star Topology

4.2 WIRING FOR MULTIPOINT CIRCUITS

The Model 1070 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.

4.2.1 DAISY CHAIN TOPOLOGY

Using a daisy chain topology, you may connect several Model 1070s 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 Patton Technical Support for specific distance estimates.

Figure 4 (below) shows how to wire the two-pair cables properly for a Model 1070 daisy chain topology. Note that the ground connection is not needed.

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

Figure 4. Model 1070 daisy chain wiring

In a multipoint topology, you must configure the CARRIER ENABLE switch (DIP switch 8) differently for the master Model 1070 than for the slave Model 1070(s). Here are the proper DIP switch settings for a daisy chain topology:

Switch Number	8
Master Positions	OFF
Slave Positions	ON

4.2.2 STAR TOPOLOGY

In a star topology, you may connect several Model 1070s 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 Patton Technical Support for specific distance estimates.

Figure 5 (below) shows how to wire the two-pair cables properly for a Model 1070 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. Model 1070 star wiring

In a multipoint topology, you must configure the CARRIER ENABLE switch (DIP switch 8) differently for the master Model 1070 than for the slave Model 1070(s). Here are the proper DIP switch settings for a star topology:

Switch Number	8
Master Positions	OFF
Slave Positions	ON

4.2 RS-232 CONNECTION

To connect the Model 1070 to data terminal hardware (PC, host, terminal, etc.), use a straight through RS-232 cable. To connect the Model 1070 to data communications hardware (modem, multiplexer, etc.), use a null modem RS-232 cable.

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