Patton electronic 3120 ユーザーズマニュアル

Cable installation

Model 3120 RAS Getting Started Guide 

3. Insert the stripped end of the positive lead into the “+DC input” of the terminal block. Tighten the screw 

until the power lead is firmly fastened. Repeat the procedure for the negative lead, using the “-DC input” 
of the terminal block. Make sure that all strands of the wire are captured and that there is no exposed wire.

4. Repeat steps 1 through 3 to install the remaining DC power connection.

Do the following:

1. Assemble a ground wire using #10 AWG wire with green-colored insulation and two ring terminals. Make 

the wire long enough to reach one of the following ground sources:

– The building ground rod (generally located at the site’s main service entrance)

– A sprinkler system pipe

– A cold-water pipe

– Building structural steel

2. Install the ground wire between the grounding stud (see figure 6) and the grounding source.

The RAS has two 10/100 Ethernet interfaces for connection to your LAN (see figure 8). The Ethernet port will 
autosense the correct speed of the local LAN and automatically negotiate half- or full-duplex operation. This 
section describes connecting the RAS to the Ethernet LAN via an Ethernet hub, switch, or workstation.

Figure 8. Model 3120 network and configuration ports

WAN

PORTS

1

2

3

4

CONFIG

EXPANSION MODULE

ETHERNET

A

10/100

B