Patton electronic 1000S Connection to the Twisted Pair Interface, Signal PIN# Color ‡

4.0 INSTALLATION

Once you have properly configured the DTE/DCE switch, you are ready to connect the Model 1000 to your system. This section tells you how to properly connect the Model 1000 to the twisted pair and RS-232 interfaces, and how to operate the Model 1000.

4.1 CONNECTION TO THE TWISTED PAIR INTERFACE

The Model 1000 supports data-only communication between two RS-232 devices at distances to 17 miles (27.2 km) and data rates to

19.2 Kbps. There are two essential requirements for installation:

1.These units work in pairs. Therefore, you must have one Model 1000 at each end of a two twisted pair interface.

2.To function properly, the Model 1000 needs two twisted pair of metallic wire. The pairs must be unconditioned, dry metallic wire, between 19 and 26 AWG (.4mm to .9mm) (the higher number gauges may limit distance). Standard dial-up telephone circuits, or leased circuits that run through signal equalization equipment are not acceptable.

For your convenience, the Model 1000 is available with three different twisted pair interfaces: RJ-11 jack, RJ-45 jack and terminal blocks with strain relief.

4.1.1 TWISTED PAIR CONNECTION USING RJ-11 OR RJ-45

The RJ-11 and RJ-45 connectors on the Model 1000's twisted pair interface are pre-wired for a standard TELCO wiring environment (see Figure 3). The table on the following page shows the signal/pin relationships.

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

When connecting two Model 1000s, it is necessary to use a

"crossover" cable. The diagram below shows how a crossover cable should be constructed for an environment where both Model 1000s use a 4-wire RJ-11 connector. Similar logic should be followed when using RJ-45 connectors or a combination of the two.

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

4.1.2 TWISTED PAIR CONNECTION USING TERMINAL BLOCKS

If your RS-232 application requires you to connect two pairs of bare wires to the Model 1000, you will need to open the case to access the terminal blocks. The following instructions will tell you how to open the case, connect the bare wires to the terminal blocks, and fasten the

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RJ-11 Jack

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RJ-45 Jack

strain relief collar in place so that the wires won't pull loose.

Figure 3. Pin Number Assignments for RJ11 and RJ45 Modular Jacks

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