User Manual

ManualsBrandsSiemens ManualsOperator unitsRoom operating unit PBA

Siemens Building Technologies CA2N1651E / 11.1998

Landis & Staefa Division 1/4

651

PBA

Room operating unit

Room operating unit for individual

room control in HVAC systems.

Used in conjunction with the

PRONTO PRFA.., PRONTO IRC PRU/A,

PRFB.., PRVU, SMART SMVU or

INTEGRAL RS controllers.

• T1 temperature sensor

• ± 3 K setpoint adjuster

• Socket for ZS1 service terminal

(for PRONTO IRC only).

PBA

Technical data

Product data

Operating range 0 ... 50 °C

Sensor element T1 (PTC)

Trimmer range ± 2.5 K

Setpoint adjustment ± 3.0 K, stepless (rotary knob)

Connections

Screw terminals 2.5 mm

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)

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

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 connected controller to be reset locally by ± 3 K.

The measured sensor signal can be recalibrated by ± 2.5 K by use of the

trimmer potentiometer on the underside of the room operating unit

An FCC telephone socket is provided on the underside of the unit for

connection of the ZS1 service terminal, used in conjunction with the

PRONTO IRC controllers for parameter-setting and diagnostics.

Ordering information

The base unit and electronic assembly are

supplied separately and must be ordered

as separate items:

PBA Electronic assembly (without base

unit)

PB1 Base unit with transparent

protective cover

22845 Service cable for ZS1 service

terminal

Ordering example

PBA (Electronic assembly)

PB1 (Base unit)

22845 (Service cable)

50938

FCC socket for ZS1

service terminal

± 2.5 K

trimmer potentiometer

– +

Summary of content (4 pages)

PAGE 1
651 PBA Room operating unit Room operating unit for individual room control in HVAC systems. Used in conjunction with the PRONTO PRFA.., PRONTO IRC PRU/A, PRFB.., PRVU, SMART SMVU or INTEGRAL RS controllers. • T1 temperature sensor • ± 3 K setpoint adjuster • Socket for ZS1 service terminal (for PRONTO IRC only). PBA Technical data Product data Operating range Sensor element Trimmer range Setpoint adjustment 0 ... 50 °C T1 (PTC) ± 2.5 K ± 3.
PAGE 2
Construction 1 2 3 93.00465 1 PB1 base unit with 7 connection terminals Not shown: Temporary transparent cover (recyclable PET) to protect the base unit after mounting. PBA assembly, comprising: 2 Printed circuit board with rotary knob for setpoint adjustment 3 Unit cover Mounting Mounting instructions (Ref. 35642) are enclosed with the operating unit. The room operating unit may be flush-mounted in a wall box or screwed directly onto a wall.
PAGE 3
Connection to the controller Use twisted pair cable to connect the PBA room operating unit and the controller. Screening is not required. See the relevant controller description for: • Connection diagrams. • Cable types and admissible lengths. Commissioning / Service To set the PRONTO IRC controller parameters and read controller data, the ZS1 service terminal may be connected to the FCC telephone socket on the room operating unit (see page 1).