User Manual

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Siemens TX-I/O Engineering and installation guide CM110562en_13
Building Technologies Checking activities 2019-05-15
7.2 Power supply
Check that device protection and specifications comply with the regulations below:
Ref.
Item
OK
1
If the mains voltage is connected to the I/O modules (max. 10 A):
Does the device protection comply with the regulations?
2
Protection of the 24V~ operating voltage:
Is the transformer fitted with a fuse for the 24V~ conductor (system
potential) and, where applicable, also for the ⊥ conductor (system
neutral)?
Do these fuses comply with the values shown in the plant diagram?
(Effective load of the connected control panel and field devices)
3
Does the AC 24 V transformer rating shown on the type plate at
least match the transformer power indicated in the plant diagram?
(power supply for all the control panel equipment including the
connected field devices)
4
Does the AC 24 V transformer type plate indicate that it is a
double-insulated safety transformer in compliance with EN 61 558
designed for continuous operation?
Check, as follows, that the devices are supplied with the required voltage:
Ref.
Item
OK
1
Local regulations applicable to work on an open control panel must
be observed!
Switch on the supply voltages.
2
The following voltages must be available in the terminal bases:
• AC 24 V operating voltage between 24V~ and ⊥
• A direct current of approx. DC 24 V between CS and ⊥ (delivered
by the power supply module)
The voltages can be checked via the test pick-ups (test terminals)
on universal and super universal modules.
7.3 Labeling and addressing
If plant-specific labels have been supplied, check their allocation to the various devices
by reference to the engineering documents (plant diagram, module list, control panel
layout etc.):
Ref.
Item
Check
OK
1
Plug-in module
Does each inserted label match the address
and function of the module concerned?
Ref.
Item
OK
1
Is the address number on the address key in the I/O module the
same as the address number on the I/O module label?
Safety precautions and
equipment specification
Supply voltage
Labeling
Addressing