10
Technical data
INPUTS
PROCESS VALUE INPUT INP1
Resolution:
> 15 bits
Decimal point:
0 to 4 digits behind the decimal
point
Limiting frequency: 2 Hz (analog)
Dig. input filter:
adjustable 0,1...100 s
Scanning cycle:
100 ms
Measured value
correction:
2-point or offfset correction
Thermocouple
®
Table 1
Input resistance:
≥
1 M
Ω
Source resistance effect:
1
µ
V/
Ω
Temperature compensation
Internal temperature compensation
Maximum additional error
±
0,5 K
External temperature compensation
between 0 and 100 °C or
adjustable
32 und 212 °F
Break monitoring
Sensor current:
≤
1
µ
A
Resistance thermometer
®
Table 2
Connection technique:
3-wire
Lead resistance:
max. 30 Ohm
Input circuit monitoring:
break and short circuit
Resistance measuring range
The BlueControl software can be used for adaptation of the
characteristic stored for temperature sensor KTY 11-6.
Physical measuring range:
0...450 Ohm
0...4500 Ohm
Number of linearization segments
15
Current and voltage measuring ranges
®
Table 3
Span start, span end:
anywhere within the measuring
range
Scaling:
selectable -19999...99999
Linearization:
15 segments, adaptable via
BlueControl
Decimal point:
adjustable
Input circuit monitoring:
with 4..20mA and 2..10V:
12,5% below span start (2mA,
1V)
CONTROL INPUT DI1
Configurable as switch or push-button!
Connection of a potential-free contact suitable
for switching “dry” circuits.
Switched voltage:
2,5 V
Current:
50
µ
A
CONTROL INPUTS DI2, DI3
(OPTION)
Configurable as switch or push-button!
Optocoupler input for active triggering
Nominal voltage
24 V DC external
Current sink (IEC 1131 type 1)
Logic “0”
-3...5 V
Logic “1”
15...30 V
Current requirement
approx.. 5 mA
Transmitter supply U
T
(Option)
Power:
22 mA /
≥
18 V
If the universal output OUT3 is used there may
be no external galvanic connection between
measuring and output circuits!
FILTER
A first order mathematic filter which is adjustable for time
constant and bandwidth is built in.
The bandwidth is the adjustable tolerance around the process
value within which the filter is active. Measured value changes
exceeding the adjusted bandwidth are output directly.
OUTPUTS
Survey of outputs
Output
Used as
OUT1 (relay)
OUT2 (relay)
OUT3 (logic)
Limit contacts, alarms, control output
OUT3 (continuous)
Control output, process value, set-point,
control deviation,
13V/22mA transmitter power supply
* All logic signals can be combined in an OR function!
RELAY OUTPUTS OUT1, OUT2
Contact type:
2 NO contacts with common
connection
Max. contact rating:
500 VA, 250 V, 2A at 48...62 Hz,
resistive load
Min. contact rating:
6V, 1 mA DC
Operating life (electr.):
800.000 duty cycles with max.
rating
Note:
If the relays OUT1...OUT3 operate external contactors, these
must be fitted with RC snubber circuits to manufacturer
specifications to prevent excessive switch-off voltage peaks..
Technical data
42
Digital 280-1
Summary of Contents for Digital 280-1
Page 48: ...12 Notes Notes Digital 280 1 48...
Page 49: ...Notes 49 Digital 280 1...
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