Siemens PBC Manuals

Siemens Building Technologies CA2N1655E / 11.1998 Landis & Staefa Division 1/4 1 655 PBC Technical data Power supply: Nominal voltage DC 15 V from PRU/A, NRU.., NRK.., AC 24 V, 50/60 Hz from other controllers – Max. tolerance ± 15 % Power consumption Max. 0.7 VA Product data: Sensor element T1 (PTC) Trimmer range ± 2.5 K Setpoint adjustment range ± 3.0 K, stepless (rotary knob) Room temperature display 3-digit LCD Display range (selected by switch) 0 ... 50 °C / 32 ... 122 °F Resolution 0.5 °C / 1 °F Connections: Screw terminals 2.5 mm2 Service socket FCC 4/4 pin Weight without unit base (including packaging) 0.15 kg Dimensions (w x h x d) 80 x 135 x 37 mm Colour: Housing NCS 0003-R20B (white) Operator elements NCS 1005-R20B (light grey) Safety: Product safety EN 61010-1 – Contamination level 2 (normal non-conductive contamination) Electrical safety SELV General ambient conditions: Usage For indoor use Operating temperature 0 ... 50 °C Storage temperature – 25 ... 70 °C Ambient humidity Max. 65 %rh annual mean, non-condensing Conformity This product meets the requirements for -marking Principle of operation The room temperature is measured with a built-in T1 temperature sensor (PTC silicon resistance element, see sheet 1713). If a sill-line sensor is used (such as the PFB-T1, for example), the room temperature sensor must not be connected (see "Terminal layout", page 2). The stepless rotary knob on the room operating unit allows the setpoint defined in the connected controller to be reset locally by ± 3 K. The LCD display shows the current room temperature in degrees Celsius (0…50 °C) or degrees Fahrenheit (32 …122 °F). The preferred temperature scale can be selected with switch S4 inside the unit. A trimmer potentiometer on the underside of the room operating unit can be used to recalibrate the measured sensor signal by ± 2.5 K (see ”Commissio- ning”, page 3). An FCC- telephone socket on the underside of the unit is provided for con- nection of the ZS1 service terminal, used in conjunction with the PRONTO IRC controllers for parameter setting and diagnostics. PBC Room operating unit with temperature display Room operating unit for individual room control in HVAC systems. Used in conjunction with PRONTO PRFA.., PRONTO IRC PRU/A, PRFB.., PRVU, SMART SMVU and INTEGRAL RS NRU.., NRK.. • T1 temperature sensor • Setpoint adjuster • Room temperature display • Socket for ZS1 service terminal (for PRONTO IRC controllers only) Ordering information The base unit and electronic assembly are supplied separately and must be ordered as separate items: PBC Electronic assembly (without base unit) PB2 Base unit with transparent protective cover 22845 Service cable for ZS1 service terminal Ordering example PBC (Electronic assembly) PB2 (Base unit) 22845 (Service cable) 50938 ± 2.5 K trimmer potentiometer – + FCC socket for ZS1 service terminal