Data Sheet for Product

8 / 14
Siemens RXL24.1 – Room controller CM2N3878en_07
Building Technologies 2015-12-23
Technical data
Power supply
Operating voltage
AC 24 V ± 20 % (SELV / PELV)
Frequency
50/60 Hz
Power consumption with connected field devices
Max. 15 VA
Caution
Internal fuse
None
External supply line protection
Fuse slow max. 10 A
or
Circuit breaker max. 13 A
Characteristic B, C, D according to EN
60898
or
Power source with current limitation of max. 10 A
Operating data
Control algorithm
PI
Inputs
Signal inputs D1, D2
Quantity
2
(for volt-free contacts)
Contact voltage
DC 16 V
Contact current
DC 5 mA
Contact transfer resistance
Max. 100 Ω
Contact insulation resistance
Min. 50 kΩ
Switch time:
min. 20ms “ON”, min. 20ms “OFF”
Measured value input B1
Compatible temperature sensors
LG-Ni 1000
Quantity
1
measuring range
0 ... 50 °C
Sensor current
0.5 mA
Resolution
0.1 K
Measuring error at 25 °C sensor temp. (without cable)
max. 0.5 K
Outputs
AC24 V triac outputs , Y1 … Y4
Quantity
4
Output voltage (equal to supply voltage)
AC 24 V ON/OFF, PWM or 3-position
Permissible load current
Max. 0.5 A
Power limitation
No internal limitations
Total nominal load
(at both outputs simultaneously)
Max. 9.5 VA (e.g. 2 thermic valve actuators
STA73 per heating and cooling sequence
Ports/interfaces
Interface to room unit
Number of room units connectable
1
Interface type for room unit
for ACS
PPS2
Bus
PPS2 baud rate
4.8 kbit/s
Baud rate on bus
9.6 kbit/s
Bus
Interface type
Electrically isolated
Bus current
5 mA
Baud rate
9.6 kbit/s
Bus topology
Refer to "engineering", page 6
Cable con
nections
Connection terminals for signals and power supply
Solid or stranded conductors
0.25 … 2.5 mm
2
or 2 x 1.5 mm
2
Bus connection terminals
(plug-in screw terminals)
Solid or stranded conductors 2 x max.1.0 mm
2
e.g. YCYM 2x2x0.8
Single cable lengt
hs
For field devices, see also the RXB & RXL
installation guide, CM110381
Signal inputs D1, D2
Max. 100 m with diameters ≥ 0.6 mm
Measured value input B1
Max. 100 m
AC24 V triac outputs , Y1 … Y4
Max. 100m where A ≥ 1.5 mm
2
Interface to room unit
M
ax. 115 m where A= 0.75 mm
2
(including connecting cable for tool)
Cable type
4-core, twisted pair, unscreened
Bus
Max. 500 m, see "engineering", page 6
Tool connecting cable
Max. 3 m