Wiring For Ac 24 V And Island Bus; Supplemental Notes On Safety - Siemens Desigo TRA Mounting And Installation Manual

Introduction
Note
Safety notes
Cabling,
duct cross-section
Wiring and connection
terminals
Tightening torque
22 / 56
Siemens
Building Technologies
7

Wiring for AC 24 V and island bus

Before starting the wiring, please comply with "Important information on safety" in
Section 3 and the "Supplemental notes on safety" listed below.
Detailed information on wiring for AC24V and island bus is available in the TX-I/O
engineering and installation guide CM110562 [2].
7.1

Supplemental notes on safety

The following notes are closely related to Section 3.2 "Device-specific
regulations"and must be observed accordingly.
Wire the devices in the standard manner in the cable ducts.
Recommendation: Design the duct cross-section with at least 30% in reserve.
Use wiring types and diameters as per the specifications below:
Item Specification
Cabling Use standard stranded cable and wiring. The ends can be
connected directly or strengthen with conductor sleeves or
pin connectors.
voltage, it must have the same level of insulation as wiring
for mains voltage.
Device The device connection terminals are designed for wiring for:
connection
• min. 0.5 mm ∅.
terminals
• max. 2 x 1.5 mm
Connection terminals are lifting clams; the contact plate
between the wire end and screw end is easy on the wiring.
terminals may be used as the connection facility.
Set the torque to 0.5-0.6 Nm or 50-60 Ncm when using electrical screwdriver on
the connection terminals.
Mounting and installation
Wiring for AC 24 V and island bus
.Important: If low-voltage wiring runs alongside mains
2
or 1 x 2.5 mm
.Important: Only the original pluggable connection
2
CM111043en_03
2013-02-23