24
English
Order Code
811 –
7. Response of the output contact AF
for a measurement/supply circuit fault
Without output contact
0
Output contact relay energized
1
Output contact relay de-energized
2
8. Climatic rating
Standard climatic rating
0
Improved climatic rating
1
Continuation «3. Specification and ordering information»
4. Brief description
The power supply unit
SINEAX B 811
provides the auxiliary
DC for
two-wire transmitters
and transfers the measured
variable unchanged to the
electrically insulated
output.
Conversion to a different signal range such as 0…5 mA or
1…5 V (signal converter) is also possible.
Some versions of the SINEAX B 811 are designed for
FSK
1
communication
. They are used in conjunction with “intelli-
gent” two-wire transmitters which are capable of dialogue
and operation according to the FSK principle and the HART
or user-specific protocol.
The series also includes “intrinsically safe” versions
[EEx ia] IIC with an intrinsically safe measurement/supply
circuit. These operate in conjunction with intrinsically safe
two-wire transmitters located in explosion hazard areas.
Provision is made for monitoring the measurement/supply
circuit to detect short and open-circuits. Either of these faults
is signalled by the fault signalling relay AF and the red LED.
The output signals A1 and A12 can be set on the DIP switches
to have a linear increasing or decreasing response.
The device fulfils the protection requirements of the EMC
guidelines (89/336/EWG). It bears the CE symbol for EMC.
5. Technical data
Input circuit (MSK)
Signal range I
E
:
4…20 mA DC
1
FSK = Frequency Shift Keying
Supply voltage U
S
(at I
E
= 20 mA):
24 V
±
7%
with standard (non-Ex) version,
not designed for communications protocol
24 V
±
7%
with standard (non-Ex) version,
designed for FSK communication
> 16.9 V
with Ex versions,
not designed for communications protocol
> 1.4 V
with Ex versions,
designed for FSK communication
Current limiter:
Electronic
At I
E
> 30 mA,U
S
is switched to 0 V
for approx 1 s.
U
S
is then automatically
readjusted to its set-point
Max. line resistance:
The maximum line resistance R
Line
permissible between the two-wire
transmitter and the supply unit
depends on the voltage difference
U
S
– U
M
:
U
S
– U
M
20 mA
U
S
= Supply voltage
for 2-wire transmitter
U
M
= min. operating voltage of
the 2-wire transmitter
Measuring output
Output signals A1 and A12
(see section “10. Electrical connections”)
The output signals A1 and A12 can be load-independent DC
voltages U
A
or 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
Line
max. =
R
ext A1
// R
ext
A12
[k
Ω
]
≥
