Siemens PBC User manual

Siemens Building Technologies CA2N1655E / 11.1998
Landis & Staefa Division 1/4
1655
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

CA2N1655E / 11.1998 Siemens Building Technologies
2/4 Landis & Staefa Division
50949
13
12
11
10
9
8
7
6
5
4
3
2
1
NS
LS
PB
PB
∆w
SGND
14
1
2
3
4
t
RA
Setpoint adjustment
Signal ground
Room temperature sensor
Service bus (PB-Service)
Service bus (SGND)
Connection to the controller
Use twisted pair cable to connect the PBC room operating unit and the
controller. Screening is not required.
See the relevant controller description for:
• Connection diagrams.
• Cable types and admissible lengths.
Service socket (FCC telephone socket)
for use only with PRONTO IRC
AC 24 V DC 15 V
Neutral NS Ground
Phase LS +15 V }supply voltage
}only with PRONTO IRC
Construction
1 Base unit PB2 (1) with 2 x 7 connection terminals
Not shown: Transparent, recyclable cover (PET) to protect the base unit
after mounting.
2 PBC electronic assembly, comprising:
– Printed circuit board with rotary knob for setpoint adjustment and
LCD display
– Unit cover
Mounting
Mounting instructions (Ref. 35642) are enclosed with the room operating
unit.
The room operating unit may be flush-mounted on a wall box or screwed
directly onto the wall.
If the built-in temperature sensor is used, the following must be noted:
• Mount in the occupied area, approximately 1.5 m above floor level and
at least 0.5 m from any adjacent wall
• Do not expose to direct sunlight
• Do not mount on external walls, in recesses, behind curtains or in the
vicinity of chimneys, doors and lamps.
See sheet 1659 for dimensions and further mounting instructions.
PBC terminal layout
50951
1 2

Siemens Building Technologies CA2N1655E / 11.1998
Landis & Staefa Division 3/4
Important:
On no account must Step 2
(‘Calibrating the display’) be
omitted.
Switch S4
50952
NS
LS
SGND
t
RA
∆w
PB
PB
Display in °C (factory setting)
Display in °F
Service (for PRONTO IRC controllers only)
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). It is then possible to set the parameters
of all controllers connected to the same trunk.
Initialisation is only possible with the ZS1 connected directly to the
relevant controller.
If there is no requirement for communication with the controllers from
the room operating unit, there is no need to wire the service bus (see
“Terminal layout”, page 2).
Commissioning
The PBC room operating unit is commissioned as follows:
1. Select temperature scale for display (°C or °F)
The preferred scale for the temperature display can be selected on switch
S4 before fitting the PBC electronic assembly to the PB2 base unit.
2. Calibrating the display
With PRONTO IRC PRU/A, PRFB.., PRVU and SMART SMVU
• Connect the ZS1 service terminal to the service socket (1) on the PBC
• Use CMD 01 on the ZS1 to display the measured room temperature
• If the LCD display (2) differs from the measured value:
1. Depress button (3) with a small screwdriver: →
° Cor ° Fwill flash
2. Use the rotary knob (4) to match the LCD display (2) to the measured
temperature
3. If the adjustment range is not wide enough, wait until flashing stops
(approx. 10 s), turn the rotary knob back and repeat steps 1 and 2.
• If the temperature now displayed deviates from the actual room
temperature (as measured by a separate thermometer), the displayed
value can be re-calibrated with the trimmer potentiometer accessible
from the bottom of the unit (see diagram on page 1 for position).
See Manual P6 for a description of the ZS1 service terminal.
With INTEGRAL RS NRU.., NRK..:
• With the NBRN operator terminal read the temperature at the
corresponding input of the NRU.. or NRK.. RS module
• If the LCD display (2) differs from the measured value:
1. Depress button (3) with a small screwdriver: →
° Cor ° Fwill flash
2. Use the rotary knob (4) to match the LCD display (2) to the measured
temperature
3. If the adjustment range is not wide enough, wait until flashing stops
(approx. 10 s), turn the rotary knob back and repeat steps 1 and 2.
• If the temperature now displayed deviates from the actual room
temperature (as measured by a separate thermometer), the displayed
value can be re-calibrated with the trimmer potentiometer accessible
from the bottom of the unit (see diagram on page 1 for position).
See Manual K23 for a description of the NBRN operator terminal.
With PRONTO PRFA..:
1. Use a separate thermometer to establish the room temperature
2. Depress button (3) with a small screwdriver: →
° Cor ° Fwill flash
3. Use the rotary knob (4) to match the LCD display (2) to the measured
temperature
4. If the adjustment range is not wide enough, wait until flashing stops
(approx. 10 s), turn the rotary knob back and repeat steps 2 and 3.
Recalibration with the trimmer potentiometer does not apply in this case.
50950
1
2
4
3

CA2N1655E / 11.1998 Siemens Building Technologies
4/4 Landis & Staefa Division
© 1998 Siemens Building Technologies Ltd.