Endress+Hauser Promass 84F, Technical Information

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Proline Promass 84F
Hauser 7
Output
Output signal Current output, HART
Active/passive selectable, galvanically isolated, time constant selectable (0.05 to 100 s), full scale value
selectable, temperature coefficient: typically 0.005% o.r./°C, resolution: 0.5
μ A
• Active: 0/4 to 20 mA, R
L
< 700
Ω
(for HART: R
L
≥
250
Ω
)
• Passive: 4 to 20 mA; supply voltage U
S
18 to 30 V DC; R
i
≥
150
Ω
Pulse / frequency output, HART
For custody transfer measurement, two pulse outputs can be operated.
Passive, galvanically isolated, open collector, 30 V DC, 250 mA
• Frequency output: Full scale frequency 2 to 10000 Hz (f
max
= 12500 Hz), on/off ratio 1:1, pulse width max.
2 s. In "Phase-shifted pulse outputs" operating mode, the end frequency is limited to a maximum of 5000 Hz.
• Pulse output: Pulse value and pulse polarity selectable, pulse width configurable (0.05 to 2000 ms)
Pulse / frequency output, MODBUS
Active/passive selectable, galvanically isolated
• Active: 24 V DC, 25 mA (max. 250 mA during 20 ms), R
L
> 100
Ω
• Passive: Open Collector, 30 V DC, 250 mA
• Frequency output: Full scale frequency 2 to 10000 Hz (f
max
= 12500 Hz), on/off ratio 1:1, pulse width max.
2 s.
• Pulse output: Pulse value and pulse polarity selectable, pulse width configurable (0.05 to 2000 ms)
MODBUS interface
• MODBUS device type: slave
• Address range: 1 to 247
• Functions codes supported: 03, 04, 06, 08, 16, 23
• Broadcast: supported with the function codes 06, 16, 23
• Physical interface: RS485 in accordance with standard EIA/TIA-485
• Baud rate supported: 1200, 2400, 4800, 9600, 19200, 38400, 57600, 115200 Baud
• Transmission mode: RTU or ASCII
• Response time:
Direct data access = typically 25 to 50 ms
Auto-scan buffer (data area) = typically 3 to 5 ms
• Possible output combinations
→ ä
9
Signal on alarm • Current output: Failsafe mode selectable (e.g. in accordance with NAMUR Recommendation NE 43).
• Pulse/frequency output: Failsafe mode selectable.
• Relay output: De-energised by fault or power supply failure.
• MODBUS RS485: If an error occurs, the value NaN (not a number) is output for the process variables.
Load See "Output signal"
Low flow cutoff Switch points for low flow cutoff are selectable.
Galvanic isolation All circuits for inputs, outputs, and power supply are galvanically isolated from each other.
Switching output Relay output
• max. 30 V / 0.5 A AC; 60 V / 0.1 A DC
• galvanically isolated
• Normally closed (NC or break) or normally open (NO or make) contacts available
(factory setting: relay 1 = NO, relay 2 = NC)