SITRANS F M TRANSMAG 2
Operating Instructions, 11/2009, A5E00102775-07
73
Technical data
10
Mode of operation
Table 10- 1 Operation mode
Measuring principle Electromagnetic with pulsed alternating field (PAC)
Magnetic field excitation Automatic power supply synchronization
50 Hz AC power supply
• Bipolar 16.7 Hz
• Bipolar with prepulse 10 Hz
• Unipolar 8,33 Hz
60 Hz AC power supply
• Bipolar 20 Hz
• Bipolar with prepulse 12 Hz
• Unipolar 10 Hz
Outputs and inputs
Table 10- 2 Outputs and Inputs
Electrical isolation Outputs electrically isolated from each other and from the
power supply, max. 60 V permissible against PE/
equipotential bonding
Current output 0/4 ... 20 mA
(Only 20 mA / HART devices (7ME5034-0.... and -2.....))
Signal range
Upper limit 0/4 ... 20 mA, selectable
Failure signal 20 ... 22.5 mA
Load 3.6 mA, 22 mA or 24 mA
Output Max. 600 Ω, load voltage max. 15 V
For HART communication: ≧ 250 Ω
Communication Via analog output with PC coupling module or HART
communicator
Protocol HART version 5.1
Digital output 1
Signal
Output Configurable for positive or negative logic
Active signal DC 24 V, ≦ 24 mA, Ri = 170 Ω
Passive signal Open collector, max. DC 30 V, 200 mA
Output configuration
Pulse
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