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Measuring output
Output signals A1 and A12
(see section "9. Electrical connections")
The output signals A1 and A12 can be load-independent DC
voltages U
or DC currents I
A
A1 and A12 are not electrically insulated; the same value is
available at both outputs.
DC voltage signals U
A
Standard ranges for U
: 0...5, 1...5, 0...10 or 2...10 V
A
Non-standard ranges:
0...> 5 to 0...15 V
resp. live-zero
> (1...5) to 3...15 V
Short-circuit current:
≤ 40 mA
Load-capacity U
/U
: 20 mA
A1
A12
Load impedance
U
/U
:
A1
A12
R
ext A1
Residual ripple:
< 1% p.p., DC ... 10 kHz
DC current signals I
A
Standard ranges for I
: 0...20 mA or 4...20 mA
A
selected by jumpers
Non-standard ranges:
0...1 to 0...< 20 mA
resp. live zero
0.2...1 to < (4...20) mA
Open-circuit voltage:
Approx. – 7...+ 22 V
Burden voltage I
:
15 V without communication
A1
10 V (15 V) with communication*
*When a hand-held terminal is connected to the field output
A12, the voltage across the burden at output A1 reduces to
10 V. Digital communication requires a minimum burden at
output A1 of 250 Ω. A 250 Ω resistor is therefore connected
across the output circuit. If the load of the burden across
output A1 already exceeds 250 Ω, the resistor can be
disconnected by changing the position of a jumper. The full
burden voltage of 15 V is then available at output A1 instead
of 10 V.
External resistance I
: R
max. [kΩ] =
A1
ext
I
= Output circuit full-scale value
AN
Burden voltage I
:
< 0.3 V (field indicator)
A12
External
resistance I
:
R
max. [kΩ] =
A12
ext
Residual ripple:
< 1% p.p., DC ... 10 kHz
Response time
(IEC 770):
Approx. 200 ms
Output
characteristic:
Linear
.
A
U
[V]
// R
[kΩ] ≥
A
ext A12
20 mA
15 V (10 V)
I
[mA]
AN
0.3 V
I
[mA]
AN
Power supply H
AC/DC power pack (DC and 45...400 Hz)
Table 1: Nominal voltages and tolerances
Nominal voltage
Tolerance
U
N
24... 60 V
DC / AC
DC – 15...+ 33%
AC ± 15%
1
85...230 V
DC / AC
24... 60 V
DC – 15...+ 33%
DC / AC
AC ± 15%
85...230 V
± 10%
AC
85...110 V
– 15...+ 10%
DC
1
For power supplies > 125 V the auxiliary circuit should include an
external fuse.
Power input:
Approx. 2.5 W resp. ≤ 4.5 VA
Communication
Bi-directional communication of digital signals with an "intel-
ligent" two-wire transmitter designed for FSK and a HART or
company-specific protocol.
Frequency range:
500 Hz ... 35 kHz
Input circuit monitor
Pick-up level:
– Open-circuit
Input current < 3.6 mA,
adjustable in the works between
1 and 4 mA
– Short-circuit
Input current > 21 mA
adjustable in the works between
20 and 23 mA
Signalling modes
Output signals
A1 and A12:
– Linear output signal
For an open-circuit output
– 5 mA (with 0...20 mA)
For a short-circuit output
approx. 26 mA
– Increasing output signal
Output approx. 115% of full-scale
value, e.g.
23 mA for output 0/4...20 mA
or
11.5 V for output 0/2...10 V
– Decreasing output signal
(only possible for live zero)
Output approx. 10% of full-scale
value, e.g.
2 mA for output 4...20 mA
or 1 V for output 2...10 V
Frontplate signals:
Failure signalled by red LED
Output contact AF:
1 relay, 1 potentially-free changeover
contact (see Table 2)
Instrument
version
Standard
(Non-Ex)
Type of
protection
"Intrinsically
safe"
[EEx ia] IIC
0 mA (with 4...20 mA)
25
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