Siemens TX-I/O TXM1.8D Functions And Operation page 53

Testing options with default functions
Test
Testing of inputs
Testing of
digital outputs
Testing of
blinds modules
Testing of
analog outputs
Siemens
Building Technologies
Action
TXM1.8D, 16D (BI Default)
Shorting the input
TXM1.8U (-ML), TXM1.8X (-ML) (UIO Default)
No voltage
(input open or shorted)
–75 ... +75 µA at input
>75 µA at input
< –75 µA at input
>11.5 V at input
AC24 V at input
TXM1.8P (RI Default)
< 40 Ohm at input
> 40 Ohm at input
TXM1.6R (-M), TXM1.6RL, TXM1.8T (BO Default)
Local override or tool
override enabled
TXM1.8RB
Tool override enabled
TXM1.8U (-ML),
TXM1.8X (-ML)
TX-I/O™ Module system – Functions and operation
Default functions, disabling function
I/O status LED LCD display
ON
OFF
OFF
ON
Flashing 1 Hz
Flashing 1 Hz
Flashing 1 Hz
ON (no LCD)
OFF (no LCD)
ON / OFF The module executes all local over-
rides or tool overrides directly, without
safety precautions or interlocks.
Special care is required

OFF / Stage 1 / Stage 2
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.
Remark
High-resistance
conductivity tester
Do not use!

Correct polarity of
low-resistance
conductivity tester
(buzzer)
Incorrect polarity of
low-resistance
conductivity tester
(buzzer)
E.g. DC24 V connec-
ted by mistake
AC24 V connected by
mistake
Especially short circuit

53/54
CM110561en_08
2018-10-25