SIEMENS
6/97
Siemens IC 10 · 2017
* You can order this quantity or a multiple thereof.
Illustrations are approximate
Solid-State Switching Devices for Resistive/Inductive Loads
Function Modules
SIRIUS load monitoring for 3RF2
6
■
Overview
Load monitoring for 3RF2 single-phase solid-state switching
devices
Many faults can be quickly detected by monitoring a load circuit
connected to the solid-state switching device, as made possible
with this module. Examples include the failure of load elements
(up to 6 in the basic version or up to 12 in the extended version),
alloyed power semiconductors, a lack of voltage or a break in a
load circuit. A fault is indicated by one or more LEDs and
reported to the controller by way of a PLC-compatible output.
The principle of operation is based on permanent monitoring of
the current intensity. This figure is continuously compared with
the reference value stored once during start up by the simple
press of a button. In order to detect the failure of one of several
loads, the current difference must be 1/6 (in the basic version) or
1/12 (in the extended version) of the reference value. In the event
of a fault, an output is actuated and one or more LEDs indicate
the fault.
■
Application
The device is used for monitoring one or more loads (partial
loads). The function module can only be used in conjunction with
a 3RF21 solid-state relay or a 3RF23 solid-state contactor. The
devices with spring-type connections in the load circuit are not
suitable.
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Selection and ordering data
■
Accessories
Rated operational current
I
e
Rated operational voltage
U
e
SD
Screw terminals
PU
(UNIT,
SET, M)
PS*
PG
A
V
d
Article No.
Price
per PU
Basic load monitoring
3RF2920-0FA08
Rated control supply voltage 24 V DC
6
--
2
3RF2906-0FA08
1
1 unit
41C
20
--
2
3RF2920-0FA08
1
1 unit
41C
• With mounted 3RF2900-0RA88 cover
6
--
2
3RF2906-0FA08-0KH0
1
1 unit
41C
20
--
2
3RF2920-0FA08-0KH0
1
1 unit
41C
Extended load monitoring
3RF2920-0GA13
Rated control supply voltage 24 V AC/DC
20
110 ... 230
2
3RF2920-0GA13
1
1 unit
41C
20
400 … 600
2
3RF2920-0GA16
1
1 unit
41C
50
110 ... 230
2
3RF2950-0GA13
1
1 unit
41C
50
400 … 600
2
3RF2950-0GA16
1
1 unit
41C
90
110 ... 230
2
3RF2990-0GA13
1
1 unit
41C
90
400 … 600
2
3RF2990-0GA16
1
1 unit
41C
Rated control supply voltage 110 V AC
20
110 ... 230
2
3RF2920-0GA33
1
1 unit
41C
20
400 … 600
2
3RF2920-0GA36
1
1 unit
41C
50
110 ... 230
2
3RF2950-0GA33
1
1 unit
41C
50
400 … 600
2
3RF2950-0GA36
1
1 unit
41C
90
110 ... 230
2
3RF2990-0GA33
1
1 unit
41C
90
400 … 600
2
3RF2990-0GA36
1
1 unit
41C
Version
SD
Article No.
Price
per PU
PU
(UNIT,
SET, M)
PS*
PG
d
Optional accessories
3RF2900-0RA88
Sealable covers
for function modules
(not for converters)
5
3RF2900-0RA88
1
10 units
41C
© Siemens AG 2016