User Manual

4/14
Building Technologies RXC34.1/ALG – Controller with LonWorks® interface CM2N3848en_02
12.01.2007
Engineering notes
The supply voltage for the RXC34.1/ALG must be volt-free.
It is connected via plug-in terminal block X1 (terminals X1.1 and X1.2).
• A supply voltage in excess of AC 29 V can cause damage to the device.
• The supply voltage for the RXC34.1/ALG must not be earthed.
Failure to comply with this instruction can cause damage to the device.
• The power transformer must be volt-free on the secondary side.
Primary voltage: 230 V
Secondary voltage: AC 24 V 15%
Power 15 VA
Fuse on secondary side: 2 A (slow blow)
The primary side can be protected by a motor circuit breaker or fuse.
Supply voltage: AC 24 V ± 15%, 50 / 60 Hz or
DC 26 V .. 35 V
Current consumption: Approx. 0.3 A with full configuration
The RXC34.1/ALG housing is earthed by connecting a cable-lug with a conductor
cross-section ≥10mm
2
(copper) to the central earthing point.
Owing to the use of cage-clamp terminals, the cross-section of the cables connected to
X1 must not exceed 2.5mm
2
.
The transformer supply voltage must be used exclusively for the RXC34.1/ALG
and not for other devices (such as sensors, valves, damper actuators etc.) as this
would cause a short circuit.
These devices must be supplied from a separate transformer or separate
transformer winding (see also connection diagrams).
The negative poles of the 14 universal inputs UE1..UE14 are interconnected inside the
controller. They have no direct contact with the RXC34.1/ALG housing.
The configuration of the inputs is determined by the application.
In principle they can be configured as follows:
− 0 .. 10 V voltage input
− Digital input (24V, max. 4.5 mA)
It takes approximately 30 ms to convert an analog input signal. For inputs configured as
digital, the conversion time is reduced to approximately 12 ms. In the "worst case"
scenario, it can take approximately 420 ms to convert all 14 universal inputs.
The universal inputs are controlled by multiplexer.
Owing to the use of cage-clamp terminals, the cross-section of the connecting cables
must not exceed 1.5mm
2
.
AC 24 V or
DC 26 ... 35 V
supply voltage
STOP
Caution
Transformer data:
Electrical values:
Earthing:
Conductor cross-
section
STOP
Caution
Universal inputs
Conductor cross-
section