VAMP Ltd
Power monitoring unit
Technical description
VAMP 260
VM260.EN004
Vamp 24h support phone : +358 (0)20 753 3264
21
2.7.2.
Remote control connection
The unit can be connected to higher level systems, e.g. network
control systems via the serial port named REMOTE on the rear
panel. To the port a SPA-Bus, ModBus, ProfiBus or IEC-103
connection can be made using a special internal or external bus
connection module. The bus type selection and the
parameterization of the bus are carried out as the unit is
configured.
Optional accessories are available for RS 485 connection (VMA
3 CG), Ethernet connection over TCP/IP protocol (VEA 3 CG)
and ProfiBus connection (VPA 3CG). Please see the
corresponding documentation for more details.
Option modules
Standards
interface Internal
Internal Internal External
Protocol
RS 232:
VX004-M3
or VX008-
4
Plastic
or Glass
RS 485:
ProfiBus:
Ethernet:
VX003 +
(VX004-
M3)
ModBus
X X X
SPA-Bus
X X X
ProfiBus
X
IEC-60870-5-
103
X X X
ModBus/
TCP
X
Transparent
TCP/IP
X
2.8.
Self-supervision
The functions of the microcontroller and the associated
circuitry as well as the program execution are supervised by
means of a separate watchdog circuit. Besides supervising the
unit the watchdog circuit attempts to restart the micro-
controller in a fault situation. If the restarting fails the
watchdog issues a self-supervision alarm because of a
permanent unit fault.
When the watchdog circuit detects a permanent fault it always
blocks any control of the other output relays, except for the self-
supervision output relay.
