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Relay outputs
PL-Link bus
Line connections
Degree of protection of
housing
Protection class
Environmental conditions
8 / 14
Siemens
Building Technologies
Quantity
Relay type
Contact rating at alternating current
Switching voltage
Rated current resistive / inductive
Switch-on current (200 ms half-time)
Switching current at AC 19 V
Contact rating at direct current
Switching voltage
Switching current at DC 5 V
Switching output
Inductive load L/R
Locking (in firmware)
Interface type
Transceiver
Bus power
Baud rate
Protection against faulty wiring AC 24 V
Bus topology: See installation guide TRA, CM111043
Connection terminals for signals and power
supply (plug-in screw terminals)
Connection terminals for PL-Link bus (plug-
in screw terminals)
Cable length
Tool connection cable
Protection as per EN 60529
Suited for use in Protection class I – or Protection class II - Plants
Operation
Temperature
Humidity
Transport
Temperature
Humidity
RXM21.1 - PL-Link IO Block
3 (Q14, Q24, Q34)
Monostable, NO contact
Max. AC 250 V, min. AC 19 V
Max. AC 5 A / 4 A (cosϕ = 0.6)
Max. 20 A
Min. AC 10 mA
Max. DC 250 V, min. DC 5 V
Min. DC 100 mA
Max. 20 W
Max. 7 ms
• Only 1 relay active at a time
• All relays 1 s OFF upon change of
stage
Galvanically isolated
TP-UART
5 mA
9.6 kbps
Proteced
Solid or stranded
0,25 ... 2.5 mm2 or 2 x 1.5 mm2
Solid or stranded wire 2 x max 1.0
mm 2
e.g. YCYM 2x2x0.8
See TRA installation manual,
CM111043
Max. 3 m
IP30 with terminal cover and wall
mounting without tophat rail
IP20 for all other mounting types
Class 3K5 as per IEC 60721-3-3
0 ... 50 °C
< 85% r.h.
Class 2K3 as per IEC 60721-3-2
– 25 ... 70 °C
< 95% r.h.
CM2N3835en_01
07 Mar 2012
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