When connecting two Model 1009s it is necessary to use a "cross
over" cable. The diagram below shows how a cross over cable should
be constructed for an environment where both Model 1009s use a 6-
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
3.1.2 TERMINAL BLOCK TWISTED PAIR CONNECTION
If your application requires you to connect one or two pairs of bare
wires to the Model 1009, you will need to access the internal terminal
blocks. The instructions on the following pages 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 that the wires won't pull loose.
Note: The terminal block configurations are different for the 1009M
(male) and 1009F (female).
5
1. Open the unit by gently inserting a screw driver between the DB-
9 connector and the lip of the plastic case (See below). You don't have
to worry about breaking the plastic, but be careful not to bend the D-sub
connector.
Once the unit has been opened, you will be able to see the
terminal block located at the rear of the PC board.
2. Strip the outer insulation from the twisted pairs about one inch
from the end.
6
+
-
-
+
XMT
G
RCV
+
-
-
+
XMT
G
RCV
1009M
1009F
1
2
3
4
5
6
1
2
3
4
5
6
7
8
Figure 1: RJ-11 and RJ-45 Modular Pin Assignments
RJ-11 Jack
RJ-45 Jack
Figure 2: 1009M and 1009F Terminal Block Signal Orientation
Figure 3: How to Use a Small Flathead Screwdriver to Begin to Open the Model 2070 Case
Figure 4: How to Use a Small Flathead Screwdriver to Finish Opening the Model 2070 Case
Figure 5: Stripping the Outer Insulation from the Twisted Pair
