DPS Telecom Building Status Unit II Manual del usuario - Página 8
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4
TX
– +
1 2 3 4
Fig. 6.1 Communication lines between the NetGuardian and the BSU II.
4-Wire Pin No.
1
2
3
4
6.3
Wire for Power
Use the following steps to wire the BSU II for power:
1. Connect a –48VDC power lead and a GND lead to the corresponding terminals of the 2-position barrier plug
— see Figure 6.2.
2. All barrier screws should be seated firmly but not over-tightened so as to nick the bare wire.
3. Push the plugs firmly back into their appropriate location on the bottom of the case.
4. Once the hardware connections are complete, power the unit(s) by applying -48VDC to the power lead.
Note: Always observe electrostatic discharge (ESD) precautions.
RX
– +
BSU II Comm. terminal
TX – (Negative)
TX + (Positive)
RX – (Negative)
RX + (Positive)
Table 6.A Data port 8 and 4-Wire pinout connections.
GND
Fig. 6.2 2-position barrier plug.
DB9 RS-485
RX+
TX+
5
4
3
2
1
9
8
7
6
TX-
RX-
Wire Color
Port 8 Pin No.
Orange/White
White/Orange
Blue/White
White/Blue
–48 VDC
Pin # Signal Description
1
TX+
Transmit data +
2
Not connected
3
Not connected
4
RX+
Receive data +
5
Not connected
6
TX-
Transmit data -
7
Not connected
8
Not connected
9
RX-
Receive data -
Signal
9
RX – (Negative)
4
RX + (Positive)
6
TX – (Negative)
1
TX + (Positive)