25
English
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
A1
:
15 V without communication
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
A1
: R
ext
max. [k
Ω
] =
I
AN
= Output circuit full-scale value
Burden voltage I
A12
:
< 0.3 V (field indicator)
External
resistance I
A12
:
R
ext
max. [k
Ω
] =
Residual ripple:
< 1% p.p., DC … 10 kHz
Response time
(IEC 770):
Approx. 200 ms
Output
characteristic:
Linear
15 V (10 V)
I
AN
[mA]
0.3 V
I
AN
[mA]
DC – 15...+ 33%
AC
±
15%
±
10%
– 15...+ 10%
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
A
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
A
: 0…5, 1…5, 0…10 or 2…10 V
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
A1
/U
A12
: 20 mA
Load impedance
U
A1
/U
A12
:
U
A
[V]
20 mA
Residual ripple:
< 1% p.p., DC … 10 kHz
DC current signals I
A
Standard ranges for I
A
:
0…20 mA or 4…20 mA
selected by jumpers
R
ext A1
// R
ext
A12
[k
Ω
]
≥
Power supply H
AC/DC power pack (DC and 45…400 Hz)
Table 1: Nominal voltages and tolerances
Nominal voltage
Tolerance
Instrument
U
N
version
24... 60 V
DC / AC
85...230 V
1
DC / AC
24... 60 V
DC – 15...+ 33%
DC / AC
AC
±
15%
85...230 V
AC
85...110 V
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
0 mA (with 4…20 mA)
– 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)
Standard
(Non-Ex)
Type of
protection
“Intrinsically
safe”
[EEx ia] IIC