Schneider Electric VSE 002 General, Power supply, TTL/RS-232 interface of the modules is

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. 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.

3. 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	RXD (in)	RXD (in)
3	TXD (out)	TXD (out)
4	RTS (in)	RTS (in)
5
6
7	GND	GND
8
9	+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