User Manual

Siemens Building Technologies CA2N1652E / 11.1998
Landis & Staefa Division 1/4
1
652
PBAS
Room operating unit
for fan-coil systems
Room operating unit for individual
room control in HVAC systems.
Used in conjunction with the
PRONTO PRFA.. and PRONTO IRC
PRU/A and PRFB.. controllers
• T1 temperature sensor
• ± 3 K setpoint adjuster
• Fan speed switch
• Socket for ZS1 service terminal
(with PRONTO IRC only)
PBAS
Technical data
Product data
Operating range 0 ... 50 °C
Sensor element T1 (PTC)
Trimmer range ± 2.5 K
Setpoint adjustment range ± 3.0 K, stepless (rotary knob)
Rotary switch, volt free Fan speeds 0 – I – II – III
– Contact rating Max. AC 250 V
Max. 6 A resistive
Max. 2 A inductive
– Voltage against earth Max. 250 V
Connections
Screw terminals 2.5 mm
2
Service socket FCC 4/4 pin
Weight without unit base
(including packaging) 0.09 kg
Dimensions (w x h x d) 80 x 135 x 37 mm
Colour
Housing NCS 0003-R20B
Operator elements NCS 1005-R20B
Safety
Product safety EN 61010-1
– Contamination level 2 (normal, non-conductive contamination)
– Overvoltage category II with transient overvoltages of
up to 2500 V
Electrical safety SELV-E (PELV to IEC 364-4-41)
General ambient conditions
Usage For indoor use
Operating temperature 0 ... 50 °C
Storage temperature – 25 ... 70 °C
Ambient humidity 10 ... 90 % rh, non-condensing
Conforms to requirements
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), 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 controller to be reset by ± 3 K.
The 4-position rotary switch is provided for control of the fan.
The measured sensor signal can be recalibrated by ± 2.5 K with the trimmer
potentiometer on the underside of the room operating unit.
An FCC telephone socket is provided on the underside of the room
operating unit for connection of the ZS1 service terminal, used in
conjunction with the PRONTO IRC controllers for parameter setting and
diagnostics.
50938
– +
± 2.5 K
trimmer
potentiometer
FCC socket for
ZS1 service
terminal
Ordering information
The base unit and electronic assembly are
supplied separately and must be ordered
as separate items:
PBAS Electronic assembly (without base
unit)
PB3 Base unit with transparent
protective cover (delivered in
packs of 10 units)
22845 Service cable for ZS1 service
terminal
Ordering example
PBAS (Electronic assembly)
PB3 (Base unit)
22845 (Service cable)