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RS232/RS485 Boards

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RS232/RS485 Doc

RS232/RS485 Communication Boards

DESCRIPTION
The optional RS-232 and RS-485 communication boards offer serial communications with the VECTRON® Meter. The RS-232 and RS-485 boards support point-to-point communications and multi-drop communications using SCS Protocol. Each board is equipped with a 12-positionDIP switch for configuration options. Figure 1 shows the 12-position DIP switch.

The RS-232 offers serial communication for the VECTRON® Meter. The RS-232 communication is connected through a DB9-Female (F) pin connector. The connector is a Data Terminal Equipment (DTE) device, which allows direct connection to a Data Communication Equipment (DCE) device with a DB9-Male (M) connector. Figure 2 illustrates the connection between a VECTRON® with an RS-232 and a computer. Figure 3 illustrates the connection between a VECTRON with an RS-232 and a modem. The DIP switches allow you to customize the configuration of the board to your needs. Baud rates between 1200-bps and 9600-bps can be set using the DIP switches. Multi-drop networking capability is available with the addition of an RS-232 splitter.

 

The RS-485 has the added capability of long distance communication and multi-drop networking without extra equipment. The RS-485 communication is connected through a RJ-11 connector. The RS-485 uses a two-wire network for communication. The omission of a ground wire in the network improves the quality of the signal.

FEATURES

RS-232 and RS-485 feature options:

1. 2 KYZ outputs with 1 LC

2. Addressing

3. Signal Conversion

4. Handshaking

5. Isolation  

There are four-assembly options available:

1. RS-232 communication.

2. RS-232 communication with 2 KYZ and 1 LC.

3. RS-485 communication.

4. RS-485 communication with 2 KYZ and 1 LC.

DIP Switch Setting for Configuration

  DIP Switch (SW1)      Description (factory default position is ON for all switches)

1.  RTS to TX :            ON (actuator closest to the board)   =  0 ms delay
                                                OFF = 100 ms or CTS whichever comes first

  2.  Address Mode:      ON = Must use an address to communicate to this board
                                                 OFF = Transparent mode ( No address needed )

  3-4.  Baud Rate:          3          4          Baud
                                               OFF     OFF      1200
                                               OFF     ON        2400
                                               ON       OFF      4800
                                               ON       ON        9600

  5-12.  Addressing:         5       6       7       8       9       10     11     12        Address  (Decimal)
                                              ON   ON   ON   ON   ON   ON   ON   ON         00000000 ( 0 )
                                              ON   ON   ON   ON   ON    ON   ON  OFF        00000001 ( 1 )

                                  OFF  OFF  OFF  OFF  OFF OFF  OFF  OFF      11111111 ( 255 )  

LED Modes

1.  Power Apply - Green LED 0.5 sec, Red LED 0.5 sec Green LED 0.5 sec, Red LED 0.5 sec   
                             then both LED’s OFF until communications is present.
2.  Receiving     -   Red LED ON while receiving data from outside the meter.
3.  Transmitting -  Green LED ON while transmitting data out of the meter.
 

APPLICATIONS
Meters can be polled from a longer distance through the RS-232 option board than through the optical port. The RS-232 can be combined with an external modem for remote polling.

An RS-232 splitter allows for the capability of polling several meters with one phone call. An RS-232 splitter splits one RS-232 signal in to separate independent signals