QVS Interface Converter IC-485S Benutzerhandbuch

IC-485S/IC-485SI

OTHERS

4-1 TERMINAL BLOCK DEFINITION

The four screw terminal block has different  defi-

nition in different operation modes.

In the DCE/DTE  mode, the terminal #l (+V) and

#2(-V) are configured to transmit data, the transmit-
ter; the terminals #3(-V) and #4(+V)  are configured

to receive data, the receiver.

In the MONITOR mode (for IC-485S only), the

terminals #l and #2 are respectively the positive and

negative of receiver #I; the terminal #3 and ##4 are

the positive and negative of receiver #2.

OTHERS

IC-485S/IC-485SI

4-2 SELF TEST

To test the internal circuit of the interface con-

verter, connect a dumb terminal to the unit and proc-
ess as follows:

1. Set SW1 to DCE (if the dumb terminal is a 

DTE

configuration).

2. Set SW2 to TxON,  RxON.

3. Connect one wire from Tx+(#l) to Rx+(#4),

and connect another wire from T

X

-(#2) to Rx-

(#3X

4. Set the terminal to full duplex and enter data,

then the data should be displayed on the screen.

Figure 4-l Terminal Block

14 User’s Manual

User’s Manual

5. If this o c c u r s  the internal circuit is opera-

tional.

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