Operating Instructions

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Siemens TX-I/O™ Module system – Functions and operation CM110561en_08
Building Technologies Digital output functions 2018-10-25
5.6 Pulse (BO Pulse)
For control and switching single stage electrical loads by means of pulses.
• Connection diagrams: see module data sheets.
• Step switches, pulse switches, bistable relays: see Q250, section 5.2.
• The function uses one I/O point.
• The TX-I/O relay modules have changeover contacts
• The process value must be written in "Triger mode". As a result, a pulse will be
created on each change of the process value from 0 to 1 or 1 to 0.
Without the trigger bit, no pulse will be created.
• The pulse time can be adjusted 0.1...25.5 (default = 0.5s)
• The break time can be adjusted 0.1...25.5 (default = 0.1s)
• After start-up, process quality is invalid, as long as no pulse has been generated.
Writing to Process value
Process value
Relay "ON"
Pulse/pause time
I/O status LED
BreakTime
PulseTime
Active
Inactive
Relay Active
Relay Inactive
10561D04
ON
OFF
PulseTime
"0"
"1Trg" "1Trg"
"0Trg"
"1Trg"
"1"
"0"
An additional ON or OFF pulse can be generated (e.g. by means of the local override).
• Pressing the override button (in the middle enables/disables local override
• When local override is active:Pressing "+" or "–" generates a pulse and writes to the
process value (with trigger bit).
• The I/O status LED lights up concurrently with the relay activity.
• Local operation can be disabled in the configuration.
• The I/O status LED is ON when the relay is active.
• In the case of an error the module status LED and the I/O status LED flash.
For details, especially in relation to flashing pattern and errors: refer to the section "Dis-
play, operation and diagnostics" in the TX-I/O™ Engineering and installation guide [6].
Application
Notes
Hardware
Function
Local override
Display