10 Technical data PROline Promag 50
108 Endress+Hauser
10.1.4 Output
Output signal Current output:
active/passive selectable, galvanically isolated, time constant selectable (0.01…100 s),
full scale value selectable, temperature coefficient: typically 0.005% o.f.s./ °C;
resolution: 0.5 µA
• active: 0/4…20 mA, R
L
< 700 Ω (for HART: R
L
≥ 250 Ω)
• passive: 4…20 mA, supply voltage V
s
: 18...30 V DC, R
i
≥ 150 Ω
Pulse / frequency output:
passive, open collector, 30 V DC, 250 mA, galvanically isolated
• Frequency output: full scale frequency 2…1000 Hz (f
max
= 1250 Hz),
on/off ratio 1:1, pulse width max. 10 s
• Pulse output: pulse value and pulse polarity selectable, pulse width configurable
(0.5…2000 ms)
Signal on alarm • Current output → failsafe mode selectable (e.g. to NAMUR recommendation NE 43)
• Pulse/frequency output → failsafe mode selectable
• Status output → “non-conductive” by fault or power supply failure
Details → Page 94
Load see “output signal”
Switching output Status output:
Open collector, max. 30 V DC / 250 mA, galvanically isolated
Configurable for: error messages, Empty Pipe Detection (EPD/OED), flow direction,
limit values
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.
10.1.5 Power supply
Electrical connections see Page 47 ff.
Cable entry Power-supply and signal cables (inputs/outputs):
• Cable entry M20 x 1.5 (8…12 mm)
• Threads for cable entries, PG 13.5 (5…15 mm), 1/2" NPT, G 1/2"
Connecting cable for remote version:
• Cable entry M20 x 1.5 (8…12 mm)
• Threads for cable entries, PG 13.5 (5…15 mm), 1/2" NPT, G 1/2"
Cable specifications see Page 51
Supply voltage 85…260 V AC, 45…65 Hz
20…55 V AC, 45…65 Hz
16…62 V DC
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