Siemens RXM21.1, Руководство пользователя

Страница: 5 / 14

5 / 14
Siemens RXM21.1 - PL-Link IO Block CM2N3835en_01
Building Technologies 07 Mar 2012
Engineering notes
Installation manual TRA, CM111043, contains all information required to engineer
the PL-Link bus (topology, repeater, etc.)
•
The PL-Link I/O-Block is operated on AC 230 V power. The device directly
supplies power to actuators (valves, dampers). As a result, no separate AC 24 V
supply is required for the field devices.
•
The sizing and fusing of the power lines are oriented to overall load and local
regulations.
•
Supply circuits are interrupted as soon as plug 19/21 is removed from the device.
(Bridges 19-19 and 21-21 are located on the print, not the plug; see terminal
diagram page 11).
•
The power lines must be fused on the device with strain relief.
•
The potential-free relay outputs allow for switching loads up to AC 250 V, 5 A
(4 A).
•
The sizing and fusing of the power lines are oriented to overall connected load
and local regulations. The switching circuits must be externally fused ( ≤ 10 A);
no internal fusing.
• The cables must be attached to the device with strain relief.
STOP
Caution!
•
Do not connect fans in parallel.
Outputs Y1 ... Y4 may not exceed 9 VA simultaneous load.
Y1, Y2 (heating) 3-position valve actuator 4.5 VA
Y3, Y4 (cooling) 3-position valve actuator 4.5 VA
Max. load for heating and cooling sequence is 9 VA each.
This is allowed because both sequences are not active simultaneously.
STOP
Note
With small loads (< 2 VA), tolerance may be > +20% (see technical data).
Application Thermal
actuators Motorized
actuators Elktromechanical
actuators.
Outout 1 Y1 Y1
Y2 Y1
Outout 2 Y3 Y3
Y4 Y3
•
The outputs are inactive
•
The device is in Backup mode
• After a timeout (2 x heartbeat time) the outputs go to Backup value
Power lines
AC 230 V
Potential-free
relay outputs
AC 230 V
Triac outputs AC 24 V
Max. load
Example:
Assignment of outputs
Behavior without a pro-
cess value (power-on,
missing PL-Link
communication