Advertisement
Once the Model 2089 is properly configured, it is ready to connect
to your system. This section tells you how to properly connect the
Model 2089 to the twisted pair and EIA/TIA-574 interfaces, and how to
operate the Model 2089.
4.1 TWISTED PAIR CONNECTION
The Model 2089 supports 2-wire or 4-wire communication between
two or more EIA/TIA-574 devices at data rates to 115.2 Kbps. There
are two essential requirements for installing the Model 2089:
1.
These units work in pairs. Therefore, you must have one Model
2089 at each end of a two twisted pair interface. In multipoint
environments, there must be one Model 2089 at the EIA/TIA-574
host and one at each EIA/TIA-574 terminal.
2.
To function properly, the Model 2089 needs two twisted pairs of
metallic wire. These pairs must be unconditioned dry metallic
wire, between 19 and 26 AWG (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 2089 is available with several
different twisted pair interfaces: RJ-11 jack, RJ-45 jack, terminal blocks
with strain relief and dual modular jacks (for multipoint daisy-chaining).
4.1.1 TWISTED PAIR CONNECTION USING TERMINAL BLOCKS
If your application requires you to connect one or two pairs of bare
wires to the Model 2089, 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
strain relief collar in place so the wires won't pull loose.
1. You should already have the case open for the configuration
procedure. If not, see Section 3.1.
2. Strip the outer insulation from the twisted pair(s) about one inch
from the end.
4.0 INSTALLATION
9
Advertisement
