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Siemens
TX-I/O™ Module system – Functions and operation
CM110561en_08
Building Technologies
Default functions, disabling function
2018-10-25
Testing options with default functions
Test
Action
I/O status LED LCD display Remark
Testing of inputs TXM1.8D, 16D
(BI Default)
Shorting the input
ON
TXM1.8U (-ML), TXM1.8X (-ML)
(UIO Default)
No voltage
(input open or shorted)
OFF
–75 ... +75 µA at input
OFF
High-resistance
conductivity tester
Do not use!
>75 µA at input
ON
Correct polarity of
low-resistance
conductivity tester
(buzzer)
< –75 µA at input
Flashing 1 Hz
Incorrect polarity of
low-resistance
conductivity tester
(buzzer)
>11.5 V at input
Flashing 1 Hz
E.g. DC24 V connec-
ted by mistake
AC24 V at input
Flashing 1 Hz
AC24 V connected by
mistake
TXM1.8P
(RI Default)
< 40 Ohm at input
ON
(no LCD)
Especially short circuit
> 40 Ohm at input
OFF
(no LCD)
Testing of
TXM1.6R (-M),
TXM1.6RL,
TXM1.8T
(BO Default)
digital outputs
Local override or tool
override enabled
ON / OFF
The module executes all local over-
rides or tool overrides directly, without
safety precautions or interlocks.
Special care is required
Testing of
TXM1.8RB
blinds modules
Tool override enabled
OFF / Stage 1 / Stage 2
Testing of
analog outputs
TXM1.8U (-ML),
TXM1.8X (-ML)
UIO Default is an input function. For safety reasons,
planned
analog outputs can not be tested with
unconfigured modules
.
As soon as the modules are configured, you can use the
functional tests of the building automation and control
system.