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4.0 INSTALLATION
After the internal jumpers are configured for your equipment, you
are ready to connect up the Model 457B. This section explains how to
connect the host and terminals to the Model 457B in a star topology
using twisted pair cable.
4.1 CONNECTION TO THE HUB
Host Connection—The host port of the Model 457B allows RJ-45
or terminal block connection of a single twisted pair cable. The
maximum distance between the Model 457B and the host is 2250 feet.
Only one host may be connected to the hub at a time.
Terminal Connections—RJ-45 ports 00 - 06 on the Model 457B
allow connection of up to seven terminals using single pair cable. The
maximum distance between the Model 457B and each terminal is 2250
feet. Note: Pin-outs of RJ-45 cables must match the pin configurations
chosen for the Model 457B's ports (see Section 3.0 for more details).
4.2 CONNECTION TO HOST AND TERMINAL HARDWARE
Most AS/400 and System 3X hardware is equipped with twinax
ports, and is set up to communicate over twinax cable. In order to
communicate over a single twisted pair, you must use a twinax to
twisted pair adapter or "BALUN" at each host and terminal connection.
The Patton Model 410 Series Twinax Balun is 100% compatible with
the Model 457B, and is highly recommended for this application. Model
410 baluns are available for RJ-11, RJ-45, or terminal block twisted pair
connection. Figure 4 (below) illustrates wiring for a star network using
one Model 457B hub and eight Model 410 baluns.
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3. On the Model 457B PC board (see figure 2, below), locate the
jumper blocks corresponding to each RJ-45 port. They are
labeled JP1 - JP8. As figure 3 (below) shows, each jumper
block has 16 pins and two jumpers.
4. Having located the jumper blocks for the ports you need to re-
configure, set the jumpers for TIP and RING according to the
table below. For example, placing the TIP jumper on jumper
pins 5 and 6 activates RJ-45 pin 3. Placing the RING jumper
on jumper pins 11 and 12 activates RJ-45 pin 6. The resulting
configuration for that RJ-45 port would be TIP-3, RING-6.
TIP Jumper Pins Active RJ-45 Pin
1 & 2 ...................................1
3 & 4 ...................................2
5 & 6 ...................................3
7 & 8 ...................................4 (default setting)
RING Jumper Pins Active RJ-45 Pin
9 & 10 .................................5 (default setting)
11 & 12................................6
13 & 14 ...............................7
15 & 16 ...............................8
5. After you have repositioned the jumpers, slide the PC board
back into the case and replace the two Phillips screws.
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Figure 4. A twisted pair star network for seven terminals
Figure 2. Model 457B PC board, showing jumper block locations
Figure 3. Jumper block, showing two jumpers and pin correspondence to RJ-45
Jumpers