Dräger Polytron 7000 Instructions For Use Manual page 89

Signal transmission to central unit
Analogue
— Measured-value signal
— Drift below zero point
— Full-scale value exceeded
— Unit fault
— Maintenance signal
Options which can be switched on or off:
— Warning
Digital
Analogue (4 to 20 mA) signal transmission (2-wire)
— Supply voltage (w/o pump or relay module)
— for a current of 3 mA
— For a current of 22 mA
— AC component
Analogue (4 to 20 mA) signal transmission (3-wire)
— Supply voltage
— AC component
— Load resistance
Digital signal transmission (2-wire)
— AC component
— Load resistance
Digital signal transmission (3-wire)
— supply voltage
— AC component
— load resistance
Digital signal transmission (4-wire)
— supply voltage
— AC component
— load resistance
PROFIBUS PA
— Communication rate
— Data volume
— Bus length
— Segment size
— Physical layer
— Segment current
Foundation Fieldbus:
— Communication rate
— Data volume
— Bus length
— Segment size
— Physical layer
1) Can be configured as desired. Factory setting: disabled.
2)
Actual supply voltage at the transmitter.
4 mA to 20 mA
3.8 mA to 4 mA
20 mA to 20.5 mA
<3.2 mA
3.4 mA
Fault signal for 1 second every 10 seconds
HART compatible,
transmission on two- or three-wire, shielded cable
16.5 V DC to 30 V DC
min. 8.0 V DC at the transmitter
<0.5 V
SS
— 12 V DC to 30 V DC (w/o pump or relay module)
<0.5 V
SS
0 ohm to 40 [ohm/volt] x (U
16.5 V DC to 30 V DC
<0.2 V ; <2.2 mV (500 to 10 000 Hz)
SS eff
0 ohm to 40 [ohm/volt] x (U
12 V DC to 30 V DC (w/o pump or relay module)
<0.2 V
SS
230 ohm to 40 [ohm/volt] x (U
12 V DC to 30 V DC (w/o pump or relay module)
<0.2 V
SS
230 ohm to 40 [ohm/volt] x (U
31.25 kBaud
244 Byte
max. 1900m
max. 32 slaves
IEC 61158-2; digital, bit-synchronous, Manchester Encoding
18.1 mA
31.25 kBaud
128 Byte
max. 1900m
max. 240 nodes
IEC 61158-2; digital, bit-synchronous, Manchester Encoding
Technical Data
1)
2)
– 4 V)
S
2)
– 4 V)
S
2)
– 4 V), max. 600 ohm
S
2)
– 4 V), max. 600 ohm
S
89