Proservo NMS81
Endress+Hauser 21
"4-20mA HART" I/O module (Ex d/XP or Ex i/IS): Technical data
General data
No. of units Max. 6 instruments per loop
Baud rate 1 200 bit/s
Cable Two-wire, twisted pair screened cable;
Core cross section: 0.2 to 2.5 mm
2
(24 to 13 AWG)
Topology • Serial bus
• Tree structure
Transmission distance Maximum 1 200 m (3 900 ft)
Instrument address Each transmitter on a signal loop has an individual bus address. This is defined within
the transmitter software and / or auxiliary configuration environment such as host
system or Field Communicator 475.
Isolation Bus inputs are electrically isolated from the other electronics
Input data
Input operating modes • 4..20mA input (1 external device)
• HART master+4..20mA input (1 external device)
• HART master (up to 6 external devices)
Internal load (to ground) 400 Ω
Measuring range 0 to 26 mA
Accuracy ±15 µA (after linearization and calibration)
Connection of a Prothermo NMT The measured level is transmitted to the Prothermo. Prothermo uses this
level to calculate the average temperature of the product.
Connection of a RTD temperature
probe
2-, 3- or 4-wire connection
Output data
Output operating modes • 4..20mA output
• HART slave +4..20mA output
Output current 3 to 24 mA
Accuracy ±15 µA (after linearization and calibration)
Error on alarm HART error message classified according to NAMUR NE 107
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