Cerabar M
Endress+Hauser 15
Output
Output signal • 4 to 20 mA, 2-wire
• 4 to 20 mA with superimposed communication protocol HART, 2-wire
• Digital communication signal PROFIBUS PA (Profile 3.0), 2-wire
Signal range 4 to 20 mA, 4 to 20 mA HART:
• 3.8 to 20.5 mA
Signal on alarm • 4 to 20 mA:
– Signal overshoot: > 20.5 mA
– Signal undershoot: < 3.8 mA
• 4 to 20 mA HART:
Options:
– MIN: 3.6 mA
– MAX: 22 mA (factory setting)
– Continue: last measured value is kept
• PROFIBUS PA: can be set in the Analog Input Block, options: last good value (factory setting),
FSAFE value, wrong value
Load – 4 to 20 mA and
4 to 20 mA HART
P01-PMx4xxxx-05-xx-xx-xx-000
Load diagram, observe explosion protection.
➀ Power supply 11.5 to 45 V DC for devices for non-hazardous areas, 1/3 D, EEx d, EEx nA, FM XP, FM DIP, CSA
XP and CSA Dust-Ex
➁ Power supply 11.5 to 30 V DC for EEx ia, 1 D, 1/2 D 1/2G, FM IS and CSA IS
R
Lmax
Maximum load resistance
U Supply voltage
Note!
Devices with 4 to 20 mA HART electronics: when operating via a handheld terminal or via a PC with an
operating program, a minimum communication resistance of 250 Ω must be taken into account.
Resolution • 4 to 20 mA:
– Current output: < 1 μA
– Onsite display: 30 segments
• 4 to 20 mA HART:
– Current output:
– Typical value: 1 μA
– Max.: 6 μA
– Onsite display: 28 segments, numerical value display with 1 per thousand resolution
• PROFIBUS PA:
– Onsite display: 28 segments, display value with resolution 1 per thousand
0
1522
1295
840
386
11.5
30 45
20
U
[V]
U – 11.5 V
R
L
max
22 mA
≤
[]Ω
R
L
max
➀
➁
40
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