Camille Bauer EURAX V 604 Betriebsanleitung Seite 22

Measuring output
Output signal A
The output signal can be either load-independent DC current
I or DC voltage U . The desired mode is set on DIP switches
A A
and the setting range is programmed on a PC.
Standard ranges for I : 0...20 mA or 4...20 mA
A
External resistance I : R max. [kΩ] =
A ext
resp. =
I = Full-scale output current value
AN
Standard ranges
for U : 0...5, 1...5, 0...10 or 2...10 V
A
Load capacity U : R [kΩ] ≥
A ext
Power supply H
AC/DC power pack (DC and 45...400 Hz)
Table 2: Rated voltages and tolerances
Rated voltage Fuse 1
U
N
24... 60 V
T 250 mA
DC / AC
85...230 V 2
T 100 mA
DC / AC
24... 60 V
T 160 mA
DC / AC
85...230 V
T 80 mA
AC
85...110 V
T 80 mA
DC
Power consumption: ≤ 1.6 W resp. ≤ 2.8 VA
Open-circuit sensor supervision
Resistance thermometers, thermo-couples, remote sensors
and potentiometer input circuits are supervised. The circuits
of DC voltage and current inputs are not supervised.
Pick-up/reset level: 1 to 15 kΩ acc. to kind of measure-
ment and range
Signalling modes
Output signals A: Programmable fixed values.
The fixed value of A is configured to
either maintain their values at the
instant the open-circuit occurs or
adopt a preset value between – 10
and 110% (referred to output span),
e.g. between 1.2 and 10.8 V (for a
scale of 2 to 10 V)
1
See Fig. 5 for location of supply fuse (12).
2 Caution! Observe note in Section 6.3
3
In relation to analogue output span A.
22
15 V
I [mA]
AN
– 12 V
I [mA]
AN
U [V]
A
20 mA
Tolerances Instrument
version
DC –15...+33%
Standard
AC ± 15% (Non-Ex)
DC –15...+33%
Type of
AC ± 15%
protection
"Intrinsi-
± 10%
cally
safety"
–15...+ 10% [EEx ia] IIC
Frontplate signals: The green LED ON flashes and the
red LED
the open-circuit sensor
Output contact K: Relay 3 with 1 potential free change-
over contact (see Fig. 4 and Table 7).
The output contact can be used:
a) as an additional means of signalling operation of the
open-circuit sensor supervision when the transmitter
is used in conjunction with resistance thermometers,
thermo-couples, resistance sensors and potentio-
meters.
b) to monitor the measured variable in relation to a limit
or its rate-of-change where an additional means of
signalling operation of the open-circuit sensor
supervision (see "a") is considered unnecessary.
c) to monitor the measured variable in relation to a limit
or its rate-of-change when measuring a DC voltage or
a current.
Note on a): The relay has to be activated by programming its
operating mode as "energised" or "de-ener-
gised".
Available operating modes are:
"Output at last value, relay energised"
"Output at last value, relay de-energised"
"Output at setting, relay energised"
"Output at setting, relay de-energised"
Note on b): The relay must be activated by programming:
"Output corr. to input variable, relay inactive"
The limit must also be programmed (see Section
"Limit")
Note on c): It is only necessary to program the limit (see
Section "Limit")
Limit value GW
Limit value: For monitoring the input variable in
relation to a lower or upper limit
between – 10 and 110%
side of Fig. 3)
or
for monitoring the rate-of-change of
the input variable
Slope =
between ± and ± 50%
side of Fig. 3)
Input variable limit
Lower Upper
G S
GW
H
H
GW
S G
H Hysteresis, GW Limit value, G Operation area, S Failure area
Fig. 3. Switching function according to limit monitored.
lights continuously during
3 (see left
∆ Measured variable
∆t
3
/s (see right
Rate-of-change
of input variable
Slope
S
H
G
Time