User Manual

CA2N1652E / 11.1998 Siemens Building Technologies

2/4 Landis & Staefa Division

Construction

PB3 base unit comprising:

1 Base unit with 7 connection terminals

2 Switch assembly with 4 connection terminals for fan control.

The above is designed to snap into position.

Not shown: Temporary transparent cover (recyclable PET) to protect the

base unit and the connection terminals during the construction phase.

PBAS electronic assembly, comprising

3 Printed circuit board with rotary knob for setpoint adjustment

4 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.

When using the built-in temperature sensor, 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.

PBAS terminal layout

∆w

50939

III

PBAS

Room temperature sensor

Room temperature sensor (SGND)

Setpoint adjustment (SGND)

Setopint adjustment

Service bus (SGND)

Service bus (PB-Service)

Fan control switch

Service socket (FCC telephone socket)

for use with PRONTO IRC only

60156