Schneider Electric Drums VSE 002 User Guide
VSE 002  
RS-485 module  
Publication version: VVSE2/EN M/B006  
User manual  
 
1 General  
VSE 002 External RS-485 Module  
1.  
General  
External RS-485 Module VSE 002 is used to connect VAMP  
protection relays to a RS-485 bus.  
Additionally this module can be used with any device, which has a  
RS-232 or TTL serial interface, when an RS-485 interface is  
required.  
2.  
3.  
Power supply  
The power for the module is taken from pin 9 of the D-connector or  
from an external power supply interface. There is a screw terminal  
(X1, see figure 1) for connecting an external +9...12Vdc power  
supply.  
Module interface to the VAMP  
relays or master device  
The physical interface to the device is a 9-pin D-connector. The  
signal levels may be either TTL or RS-232.  
The TTL/RS-232 interface of the modules is:  
Pin number  
TTL mode  
-
RS-232 mode  
-
1
2
3
4
5
6
7
8
9
RXD (in)  
TXD (out)  
RTS (in)  
RXD (in)  
TXD (out)  
RTS (in)  
GND  
GND  
+8V (in)  
+8V (in)  
The active state of the RTS signal is positive  
voltage (> +3V) in both TTL and RS-232 modes.  
VVSE2/EN M/B006  
3
 
     
4 RS-485 interface  
VSE 002 External RS-485 Module  
4.  
RS-485 interface  
The RS-485 interface supports 2-wire connection. The dip switch  
S1 is used to switch the termination and signal biasing resistors on  
or off.  
Termination  
ON  
OFF  
Interface type  
TTL  
RS-232  
Figure 1. Dipswitch positions of VSE 002  
The direction control of the RS-485 transceiver is done with the  
RTS signal or automatically. The automatic direction control turns  
the transceiver to transmit mode after detecting the falling edge of  
a 0-bit. The direction is kept in transmit mode for 0,5ms. This  
enables the use of the automatic mode with 9,6 kb/s and 19.2 kb/s  
speeds. When the transceiver is changed to receive mode, the  
RS-485 line changes state to logic 1 state due to the biasing  
resistors.  
VVSE2/EN M/B006  
4
 
 
VSE 002 External RS-485 Module  
5 Module layout  
5.  
Module layout  
Figure 2. Component layout  
6.  
Module mounting  
Figure 3. Mounting picture of module  
VVSE2/EN M/B006  
5
 
   
7 Module connection to a PC  
VSE 002 External RS-485 Module  
7.  
Module connection to a PC  
The module can be used with a PC, the required cable is  
described in figure 4. When used with a PC an external power  
supply is needed (e.g. type Phoenix Contact 100 – 240 AC/10-15  
DC/2, Order-No. 29 83 75 6).  
PC serial interface  
VSE 002  
Function  
Pin  
Pin  
Function  
number  
number  
CD (in)  
1
2
3
1
2
3
-
RXD (in)  
RXD (in)  
TXD  
(out)  
TXD  
(out)  
DTR  
(out)  
4
4
RTS (in)  
GND  
5
6
7
5
6
7
-
DSR (in)  
-
RTS  
(out)  
GND  
CTS (in)  
-
8
9
8
9
-
+8V (in)  
Figure 4. PC interface cable  
8.  
Ordering codes  
VSE 002  
RS-485interfacemodule  
VVSE2/EN M/B006  
6
 
   
 
Customers Care Center  
http://www.schneider-electric.com/ccc  
Schneider Electric  
35 rue Joseph Monier  
92506 Rueil-Malmaison  
FRANCE  
Phone: +33 (0) 1 41 29 70 00  
Fax: +33 (0) 1 41 29 71 00  
www.schneider-electric.com  
Publication version: VVSE2/EN M/B006  
Publishing: Schneider Electric  
02/2013  
 

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