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Siemens
Desigo TRA Engineering, mounting and installation
CM111043en_09
Building Technologies
Electrical features of inputs & outputs
2016-02-22
8.3
Digital outputs (relays, triacs)
8.3.1 Admissible relay load
Type
TXM1.6R...
TXM1.6RL
TXM1.8RB
DXR2...
RXM21.1
RXM39.1
Data sheet
N8175
N8177
N8178
N9204ff
N3835
N3836
General use
4 (3) A
4 (3) A
Fan stages
4 (3) A
4 (3) A
5 (4)
Fan release
4 (3) A
4 (3) A
5 (4)
(Q34)
Electric reheater
(4 (3) A)
(4 (3) A)
1,8 kW
ohm load
(Q14)
Light
10 A
Blinds
3 A
8.3.2 Admissible triac load
Type
TXM1.8T
DXR2...
AC 230 V
DXR2...
AC 24 V
4)
RXM21.1
AC 230 V
Data sheet
Signal type
N8179
N9204, N9206
N9205, N9207
N3835
Max. continuous load
BO, MO
8 x 3 VA
3)
4 x 6 VA
4 VA
1)
6
VA
2 x 4.5 VA
3-position
4 x 6 VA
3)
4 VA
1)
6
VA
2 x 4.5 VA
PWM 0...100%,
Spring return
8 x 3 VA
3)
4 x 6 VA
4 VA
1)
6
VA
2 x 4.5 VA
PWM 5...50% 8 x 3 VA
3)
4 x 6 VA
2 x 4 VA
1)
2 x 6VA
2)
2 x 4.5 VA
Short time load per triac for
starting power in cold condition
12 VA
2)
max.90s
6 VA
2)
max.300s
6 VA
2)
12
VA
2)
Field supply AC 24 V
240 VA
3)
4 VA
1)
6
VA
--
Field supply DC 24 V
--
--
xx12P --
xx18 2.4 W
--
Sum for device
24 VA without
field supply
4 VA
1)
xx12P
72 VA
xx18 88 VA
9 VA
1)
By choosing appropriate signal types, multiple actuators can be run at the same
time because of staggered activation of the triacs. Details see below.
2)
Thermal actuators with a starting power of 6 VA in cold condition:
If driven by a 5...50% PWM signal, they only count for 3 VA.
3)
T 10A fuse in the PXC3 / the power supply module / the bus connection module.
Caution!
Use cable cross section suited for 10 A according to local
regulations.
4)
Each triac has a current limitation. No fault messages in case of overload or
short circuit.