Siemens TX-I/O TXM1.8X-ML - Digital output functions

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Siemens TX-I/O™ Module system – Functions and operation CM110561en_08
Building Technologies Digital output functions 2018-10-25
5 Digital output functions
5.1 General information on the digital outputs
The following functions for digital outputs are available in the TX-IO™ range:
Signal type (TRA)
Signal type
Description
BO Relay NO 250V
BO Relay NC 250V
(Section 5.2)
Q250
Maintained contact, relay, changeover
1)
(also control of Step switches, pulse switches, bistable relays)
BO Triac NO
BO Triac NC
(Section5.3)
-- Maintained contact, triac
Control of AC 24 V devices, especially thermic and motoric actuators
Admissible load per I/O point: see data sheet N8179.
BO Bistable NO / NC
(Section 5.4)
-- Maintained contact, bistable (for lighting applications,
behavior in case of power fail and bus fail can be parameterized)
BO Pulse On-Off
(Section 5.5)
Q250-P /
Q250A-P
On/off pulse, N/O and N/C contact
BO Pulse
(Section 5.6)
-- Pulse
MO Steps
(Section 5.7)
Maintained contact
1)
;
mutually exclusive electronic relay interlock
MO Pulse
(Section 5.8)
Q-M1…M4 Multistate pulse
mutually exclusive electronic relay interlock
BO 3-Pos Relay
BO 3-Pos Triac
(Section 5.9)
Y250T
Pulse, control signal, three-position output, internal stroke algorithm
1)
BO PWM
(Section 5.10)
-- Pulse width modulation, output AC 24 V
BO Blind Relay
(Section)
-- Maintained contact relay, blinds control with 2 / 3 end switches
Admissible load per I/O point: see data sheet N8178.
1)
Feedback must be implemented using separate inputs
All relays in TX-I/O modules are equipped with changeover contacts.
Exceptions:
• TXM1.6RL, see section 5.3)
• TXM1.8RB, see section 5.11)
Local Override
Process
value
Signal Processing
I/O status LED
LO LED
BUS
10561Z207
LED color
Normal
Service
Alarm
Block diagram of function
I/O functions
Hardware
Function