VEGA VEGALOG 571 - Manual (Page 11)

VEGALOG 571 11
CPU-card
Interfaces
To LOGBUS via LOGBUS-socket on the module card
RS 232 via PC via 9-pole D-SUB-socket (pins)
in the front plate of the module card
Electrical separating measures
Galvanic isolation
acc. to VDE 0106, part 1
between power supply, LOGBUS-connection
and RS 232-interface
- reference voltage 250 V
- isolation resistance 2,3 kV
Indicating elements
LED in front plate green (on): operating voltage on
red: fault signal
EA-card
Meas. data inputs
Number 10 inputs
Kind analogue two-wire input,
active or passive also mixed
Range 0 … 20 mA
Sensors capacitive electrodes
hydrostatic pressure transmitters
vibrating level switches
conductive electrodes
process and differential pressure transmitters
Further connection possibilities external current sources 0 … 20 mA, switching
contacts
Sensor supply voltage 24 V DC
Current limitation per sensor circuit 26,5 mA, permanently short
circuit-proof
Max. input voltage 24 V DC
Switching threshold adjustable via adjustment software VVO
in the range of 4 … 20 mA
Min. hysteresis 80
µ
A (fixed)
Linearity error 0,1 % of range (for input active and passive)
Average gradient failure 0,5 % of range (only for input passive)
Temperature failure 0,025 %/10 k of range
Connection line 2-wire (standard line)
Resistance per conductor max. 35
Ω
Interfaces
To LOGBUS via LOGBUS-plug on the module card
Product description