12
Figure 4.
Model 2174 (Terminal Block) twisted pair line interface
Connecting the Line Interface for Model 2174/BNC
To connect the line interface of the Model 2174/BNC, simply use a coax-
ial cable with a BNC connector at each end to connect the pair of Model
2174s.
3.2 CONNECTING THE 10/100BASE-T ETHERNET INTERFACE
The RJ-45 ports labeled
Ethernet
are the Auto-MDIX10/100Base-T inter-
face. These ports are designed to connect directly to a 10/100Base-T
device or network. Figure 5 shows the signal/pin relationships on this
interface. You may connect this port to a hub or PC using a straight
through or crossover cable that is up to 328 ft long.
Figure 5.
Model 2174 10/100Base-T RJ-45 Connector Pinout.
The Interconnecting cables shall be acceptable for
external use and shall be rated for the proper applica-
tion with respect to voltage, current, anticipated tem-
perature, flammability, and mechanical serviceability.
Eth
3
Eth0
Eth1
Eth2
12V
DC
1A
RING
TIP
CAUTION
1 TX+/RX+
2 TX-/RX-
3 RX+/TX+
4 (no connection)
5 (no connection)
6 RX-/TX-
7 (no connection)
8 (no connection)
1
2
3
4
5
6
7
8
