User Manual

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Building Technologies RXC34.1/ALG – Controller with LonWorks® interface CM2N3848en_02
12.01.2007
• With the exception of the digital input cable, all connecting cables should be
screened, twisted-pair signal cables. Every universal input connection should be a
twisted pair.
• For active measuring transducers with 3-wire connections, note the following:
The measuring transducer should be connected using two twisted pairs. One
twisted pair is used for the power supply, and the other for the signal, with the
transducer acting as frame earth.
• The conductor screen must be connected to a shield bus, ensuring good surface
contact, before connection to the RXC34.1/ALG.
The fast-counting binary inputs BE1 .. BE4 are used to read switch states and count
switching pulses with a maximum switching frequency of 50 Hz.
Only volt-free contacts may be connected to the binary inputs.
The contacts are interrogated with approximately 24 V / 6 mA
The maximum counter frequency is 50 Hz, defined by the software.
Owing to the use of cage-clamp terminals, the cross-section of the connecting cables
must not exceed 1.5mm
2
.
The digital outputs are designed as volt-free relay contacts. The contacts have a rating
of max. AC 230 V and max. 2A.
The relays are arranged in two groups:
BA1 .. BA4 Changeover contacts
BA5 .. BA8 Changeover contacts
STOP
Caution
• Within any one of these groups, only one operating voltage, either AC 230 V or
safety low voltage may be used.
Mixed operation within a group is not permissible.
• Protective circuits, interference suppression etc. must be implemented externally,
according to the application.
•
Recommendation: Minimum contact rating:
AC 230 V ±20%: 5 mA
AC 24 V ±20%: 20 mA
DC 5 V: 100 mA
Owing to the use of cage-clamp terminals, the cross-section of the connecting cables
must not exceed 2.5mm
2
.
Analog outputs AA1 .. AA8 have the following features:
EMC precautions
Digital inputs,
fast counting
Conductor cross-
section
Volt-free
relay outputs
up to AC 250 V
Conductor cross-
section
Analog outputs