User's Manual

S2510 Reader - Reference Guide April ’00

4.4.2.1 Activation

The Data Terminal Ready signal (DTR) is connected to the reset/watchdog circuit of

the S251B Reader. This ensures a PC controlled microcomputer initialization before

the default Read Mode is started.

When power is applied to the reader the Data Set Ready signal (DSR) of the RS232-

C interface is activated.

4.4.3 RS422

Connect the WECO (marked RS422 / 485) connector as shown in Table 30. Set the

switches as shown in Figure 8. If you are only using one reader the line terminal

switch 3 must be switched to ON, if you are using more than one reader only the last

reader in the line must be switched to ON (all other readers to OFF).

5 GND Signal Ground -

6 DSR Data Set Ready Output

7 - Not connected -

8 - Not connected -

9 - Not connected -

Table 29: RS232 WECO Connector

Pin Signal Description Direction

1 RxD Receive Data Input

2 DTR Data Terminal Ready Input

3 GND Signal Ground -

4 TxD Transmit Data Output

5 DSR Data Set Ready Output

6 GND Signal Ground -

Table 28: RS232 9-pin Connector

Pin Signal Description Direction