RWD62 ,Siemens,Universal controller, AC 24 V, 2 modulating outputs
Universal controller with P or PI action for heating, ventilation and air conditioning.
Auxiliary functions
- PI limiter function (absolute and relative limit)
- Remote setpoint
- Setpoint compensation
- Winter/summer mode changeover (analogue or digital input)
- Cascade control
- Maximum priority for cooling / dehumidifying
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Siemens MXG461B.. Modulating control valves with magnetic actuators, PN 16
Short positioning time (< 2 s), high resolution (1 : 1000)
? Selectable valve characteristic: equal-percentage or linear
? High rangeability
? Operating voltage AC / DC 24 V
? Selectable standard signal inputs DC 0/2…10 V or DC 0/4…20 mA
? DC 0…20 V Phs phase-cut signal input for Staefa controllers
? Indication of operating state, visible from the outside
? Accurate position feedback signal by inductive stroke measurement
? Spring return facility: A ? AB closed when deenergized
? Low friction, robust and maintenance-free
? Including fittings
Siemens MXG461..P Modulating control valves with magnetic actuators, PN 16
Fast positioning time (<2 s), high-resolution stroke (1 : 1000), high rangeability
? Equal-percentage or linear valve characteristic (user-selected)
? Operating voltage AC / DC 24 V
? Switch-selected control signal DC 0/2…10 V or DC 4…20 mA
? DC 0…20 V phase cut control signal with SEZ91.6 external interface
? Indication of operating state, position feedback and manual control
? Wear-free inductive stroke measurement
? Fail-safe feature: A ? AB closed when de-energized
? Low friction, robust, no maintenance required
Siemens QFM31..D Duct sensors for rel. humidity / temperature for demanding requirements
• • Operating voltage AC 24 V / DC 13.5…35 V
• Signal output DC 0…10 V / 4…20 mA for relative humidity and temperature
• Very high measuring accuracy across the entire measuring range
• Function test
• Capacitive humidity measurement
• Range of use −40…+70 °C / 0…100 % r. h. with LCD display −25…+70 °C / 0…100 % r.h.
Siemens QFM31..Duct sensors for rel. humidity / temperature for demanding requirements
• Operating voltage AC 24 V / DC 13.5…35 V
• Signal output DC 0…10 V / 4…20 mA for relative humidity and temperature
• Very high measuring accuracy across the entire measuring range
• Function test
• Capacitive humidity measurement
• Range of use −40…+70 °C / 0…100 % r. h. with LCD display −25…+70 °C / 0…100 % r.h.
Room sensors
QFA41…
for relative humidity and temperature with calibration certificates
• Operating voltage AC 24 V / DC 13.5…35 V
• Signal output DC 0…10 V / 4…20 mA for relative humidity and temperature
• Very high measuring accuracy across the entire measuring range
• Capacitive humidity measurement
• Recalibration service
• Test function for loop test
• Range of use −40…+70 °C / 0…100 % r. h. with LCD display −25…+70 °C / 0…100 % r. h.
Use
The QFA41… sensor is used in ventilation and air conditioning plants requiring:
• Very high accuracy and reliability for measuring relative humidity and temperature
• Regular recalibration and readjustment of the sensors
Examples:
• Storage and production facilities in the paper, textiles, pharmaceutical, chemical, electronics industries, etc.
• Laboratories
• Hospitals
• Computer centers
• Greenhouses
Modulating refrigerant valves with magnetic actuator, PS45
MVL661..-..
Hermetically sealed, for safety refrigerants
· One valve type for expansion, hot-gas and suction throttle applications
· Hermetically sealed towards outside
· Selectable standard interface DC 0/2…10 V or DC 0/4…20 mA
· High resolution and control accuracy
· Precise positioning control and position feedback signal
· Short positioning time (< 1 s)
· Closed when deenergized
· Robust and maintenance-free
· Six valve sizes with kvs values from 0.25 to 12 m³/h
Use
The MVL661..-.. refrigerant valve is designed for modulating control of refrigerant
circuits including chillers and heat pumps. It can be used in expansion, hot-gas and
suction throttle applications as well as with all commonly used safety refrigerants (R22,
R134a, R227ea, R404A, R407C, R410A, etc.) and R744 (CO2).