Endress+Hauser RMS621 - Power Supply and Performance

RMS621 Technical data
Endress+Hauser 63
Transmitter power supply and
external power supply
• Transmitter power supply unit, terminals 81/82 or 81/83 (optional universal extension cards
181/182 or 181/183):
Max. output voltage 24 V DC ± 15%
Impedance < 345 Ω
Max. loop current 22 mA (at U
out
> 16 V)
• Technical data Energy Manager:
HART
®
communication is not impaired
Number: 2 (in the basic unit)
Max. number: 8 (depends on the number and type of extension cards)
• Additional power supply (e.g. external display), terminals 91/92:
Supply voltage 24 V DC ± 5%
Current max. 80 mA, short-circuit proof
Number 1
Source resistance < 10 Ω
10.0.3 Power supply
Supply voltage • Low voltage power unit: 90 to 250 V AC 50/60 Hz
• Extra-low voltage power unit: 20 to 36 V DC or 20 to 28 V AC 50/60 Hz
Power consumption 8 to 26 VA (depending on version)
Connection data interface RS232
– Connection: jack socket 3.5 mm, front
– Transmission protocol: ReadWin
®
2000
– Transmission rate: max. 57,600 baud
RS485
– Connection: plug-in terminals 101/102 (in the basic unit)
– Transmission protocol: (serial: ReadWin
®
2000; parallel: open standard)
– Transmission rate: max. 57,600 baud
Optional: additional RS485 interface
– Connection: plug-in terminals 103/104
– Transmission protocol and transmission rate as standard interface RS485
10.0.4 Performance characteristics
Reference operating
conditions
• Power supply 230 V AC ± 10%; 50 Hz ± 0.5 Hz
• Warm-up period > 30 min
• Ambient temperature range 25 °C ± 5 °C (77 °F ± 9 °F
• Air humidity 39% ± 10% r. h.
Arithmetic unit
Medium Variable Range
Water
Temperature measuring range -200 to 374 °C (-328 to 705.2 °F)
Maximum temperature differential range ∆T 0 to 374 K (0 to 673.2 °F)
Error limit for ∆T 3 to 20 K (5.4 to 36 °F) < 1.0% of measured value
20 to 250 K (36 to 450 °F) < 0.3% of measured value
Arithmetic unit accuracy class Class 4 (as per EN 1434-1 / OIML R75)
Measurement and calculation interval 500 ms