User Manual

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Siemens RXL21.1, RXL22.1 Room controllers CM2N3877en_09
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 (RXL21.1)
Max. 16 VA (RXL22.1)
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 (RXL21.1)
2 (RXL22.1)
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 valves, type
STP73 per heating and cooling sequence
+ 1 damper actuator 4.5 VA)
Relay outputs Q14, Q24, Q34
Quantity 3
Relay type Monostable
Contact rating with AC voltage
Switching voltage Max. AC 250 V, min. AC 19 V
Nominal current, resistive/inductive Max. AC 5 A/4 A (cos ϕ = 0.6)
Making current 200 ms half-time Max. 20 A
Switching current at AC 29 V Min. AC 10 mA
Contact rating with DC voltage
Switching voltage Max. DC 250 V, min. DC 5 V
Switching current at DC 5 V Min. DC 100 mA
Switching capacity Max. 20 W
Inductive load L/R Max. 7 ms
External fuse (essential) Max. 10 A, see Power supply
Q44 Relay type Monostable
Contact rating with AC voltage
Max. admissible load (resistive only) Max. 1.8 kW
External fuse (essential) Max. 10 A, see Power supply
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 the bus 9.6 kbit/s
Bus Interface type
Electrically isolated
Bus current
5 mA
Baud rate bus 9.6 kbit/s
Bus topology
Refer to Engineering, page 7