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Siemens
RXM21.1 - PL-Link IO Block
CM2N3835en_01
Building Technologies
07 Mar 2012
Relay outputs
Quantity
3 (Q14, Q24, Q34)
Relay type
Monostable, NO contact
Contact rating at alternating current
Switching voltage
Max. AC 250 V, min. AC 19 V
Rated current resistive / inductive
Max. AC 5 A / 4 A (cos
ϕ
= 0.6)
Switch-on current (200 ms half-time)
Max. 20 A
Switching current at AC 19 V
Min. AC 10 mA
Contact rating at direct current
Switching voltage
Max. DC 250 V, min. DC 5 V
Switching current at DC 5 V
Min. DC 100 mA
Switching output
Max. 20 W
Inductive load L/R
Max. 7 ms
Locking (in firmware)
•
Only 1 relay active at a time
•
All relays 1 s OFF upon change of
stage
PL-Link bus
Interface type
Galvanically isolated
Transceiver TP-UART
Bus power
5 mA
Baud rate
9.6 kbps
Protection against faulty wiring AC 24 V
Proteced
Bus topology: See installation guide TRA, CM111043
Line connections
Connection terminals for signals and power
supply (plug-in screw terminals)
Solid or stranded
0,25 ... 2.5 mm2 or 2 x 1.5 mm2
Connection terminals for PL-Link bus (plug-
in screw terminals)
Solid or stranded wire 2 x max 1.0
mm2
e.g. YCYM 2x2x0.8
Cable length
See TRA installation manual,
CM111043
Tool connection cable
Max. 3 m
Degree of protection of
housing
Protection as per EN 60529
IP30 with terminal cover and wall
mounting without tophat rail
IP20 for all other mounting types
Protection class
Suited for use in Protection class I – or Protection class II - Plants
Environmental conditions
Operation
Class 3K5 as per IEC 60721-3-3
Temperature
0 ... 50 °C
Humidity
< 85% r.h.
Transport
Class 2K3 as per IEC 60721-3-2
Temperature
– 25 ... 70 °C
Humidity
< 95% r.h.
