Bender LINETRAXX RCM410R-24/-2 User manual

Manual ENRCM410R-x_D00403_02_M_XXEN / 10.2022
LINETRAXX® RCM410R-24/-2
Single-channel AC and pulsed DC sensitive
residual current monitor for AC systems

2 RCM410R-x_D00403_02_M_XXEN / 10.2022
Service and support for Bender products
First-level support
Technical support
Carl-Benz-Strasse 8 • 35305 Grünberg • Germany
Telephone: [phone]
0700BenderHelp *
Fax: [phone]
E-mail: [e-mail]
Available on 365 days from 7.00 a.m. to 8.00 p.m. (CET/UTC +1)
* Landline German Telekom: Mon-Fri from 9.00 a.m. to 6 p.m.: 6.3 cents/30 sec.; remaining time: 6.3
cents/min.
Mobile phone: higher, depending on mobile phone tari
Repair service
Repair, calibration and replacement service
Londorfer Strasse 65 • 35305 Grünberg • Germany
Telephone: [phone] (technical issues) or
[phone], -785 (commercial issues)
Fax: [phone]
E-mail: [email protected]
Field service
On-site service
Telephone: [phone], -762 (technical issues) or
[phone] (commercial issues)
Fax: [phone]
E-mail: [e-mail]
Mo.-Thu. 7 a.m.- 4 p.m, Fr. 7 a.m. - 1 p.m. (CET/UTC +1)

RCM410R-x_D00403_02_M_XXEN / 10.2022 3
LINETRAXX® RCM410R-24/-2
Table of contents
1 General instructions .........................................................................5
1.1 How to use this manual..............................................................................................5
1.2 Indication of important instructions and information ...................................5
1.2.1 Signs and symbols........................................................................................................5
1.3 Training courses and seminars.................................................................................5
1.4 Delivery conditions.......................................................................................................5
1.5 Inspection, transport and storage ..........................................................................6
1.6 Warranty and liability...................................................................................................6
1.7 Disposal of Bender devices........................................................................................6
1.8 Safety.................................................................................................................................7
1.9 Intended use...................................................................................................................7
2 Function...............................................................................................8
2.1 Device features ..............................................................................................................8
2.2 Functional description ................................................................................................8
2.2.1 Connection monitoring..............................................................................................8
2.2.2 Manual self test..............................................................................................................9
2.2.3 Malfunction .....................................................................................................................9
2.2.4 Alarm assignments to the alarm relay .................................................................9
2.2.5 Delay times tb, t, ton, and toff ......................................................................................9
2.2.5.1 Recovery time tb...................................................................................................................... 9
2.2.5.2 Start-up delay t........................................................................................................................ 9
2.2.5.3 Response delay ton .................................................................................................................. 9
2.2.5.4 Delay on release toff ................................................................................................................ 9
2.2.6 Factory settings FAC ....................................................................................................9
2.2.6.1 Factory settings without interface..................................................................................10
2.2.6.2 Factory settings with interface.........................................................................................10
2.2.7 Combined function button (T/R button)...........................................................10
2.2.8 Fault memory ..............................................................................................................10
2.2.9 NFC interface ..............................................................................................................10
3 Installation and connection .......................................................... 11
3.1 Installation ....................................................................................................................11
3.2 Connection of RCM410R-24/-2 ............................................................................. 12
3.2.1 Connections .................................................................................................................12
3.2.2 Wiring diagrams .........................................................................................................13
3.2.2.1 Supply voltage US..................................................................................................................13
3.2.2.2 Measuring-current-transformer connection ..............................................................14
3.2.2.3 RS-485 Interface .....................................................................................................................14
3.2.2.4 Relay ...........................................................................................................................................15

4 RCM410R-x_D00403_02_M_XXEN / 10.2022
General instructions
4 Operation and settings on the device ........................................ 16
4.1 RCM410R control panel
4.1.1 STATUS LED..................................................................................................................16
4.1.2 ALARM LEDs.................................................................................................................17
4.1.3 VALUE DISPLAY LEDs................................................................................................17
4.1.4 Potentiometer residual operating current IΔn................................................17
4.1.5 Potentiometer response delay ton .......................................................................18
4.1.6 T/R BUTTON..................................................................................................................18
4.1.6.1 "RESET" function ...................................................................................................................18
4.1.6.2 "TEST" function ......................................................................................................................18
4.1.6.3 "NFC" function ........................................................................................................................19
4.1.6.4 "ADDR" function ...................................................................................................................19
5 Modbus settings.............................................................................. 20
5.1 Overview........................................................................................................................20
5.1.1 Read and write permissions...................................................................................20
5.1.2 Data types.....................................................................................................................20
5.1.3 Register areas...............................................................................................................20
5.2 Register table...............................................................................................................21
6 Error – Cause – Error correction ................................................... 25
7 Technical data.................................................................................. 26
7.1 Standards & certifications ....................................................................................... 27
7.2 Licences .........................................................................................................................27
7.3 Ordering information ...............................................................................................27

RCM410R-x_D00403_02_M_XXEN / 10.2022 5
LINETRAXX® RCM410R-24/-2
1 General instructions
1.1 How to use this manual
This manual is intended for qualified personnel working in electrical engineering and
electronics! In addition to this manual, the enclosed "Safety instructions for Bender pro-
ducts" are part of the device documentation.
Read the manual before mounting, connecting, and commissioning the device.
Always keep the manual within easy reach for future reference.
1.2 Indication of important instructions and information
I Danger! Indicates a high risk of danger that will result in death or serious injury if not
avoided.
I Warning! Indicates a medium risk of danger that can lead to death or serious injury, if not
avoided.
I Caution! Indicates a low-level risk that can result in minor or moderate injury or damage to
property if not avoided.
i
Information can help to optimise the use of the product.
1.2.1 Signs and symbols
Disposal Recycling Temperature range
Protect from moisture Protect from dust RoHS directives
1.3 Training courses and seminars
www.bender.de > Know-how-> Seminars.
1.4 Delivery conditions
The conditions of sale and delivery set out by Bender apply. These can be obtained from Bender
in printed or electronic format.
The following applies to software products:
"Software clause in respect of the licensing of standard software as part of deliveries,
modifications and changes to general delivery conditions for products and services in
the electrical industry."
Die Elektroindustrie

6 RCM410R-x_D00403_02_M_XXEN / 10.2022
General instructions
1.5 Inspection, transport and storage
Check the shipping and device packaging for transport damage and scope of delivery. The follow-
ing must be observed when storing the devices:
1.6 Warranty and liability
Warranty and liability claims in the event of injury to persons or damage to property are excluded
in case of:
• Improper use of the device.
• Incorrect mounting, commissioning, operation and maintenance of
the device.
• Failure to observe the instructions in this operating manual regard-
ing transport, commissioning, operation and maintenance of the de-
vice.
• Unauthorised changes to the device made by parties other than the
manufacturer.
• Non-observance of technical data.
• Repairs carried out incorrectly.
• Use of accessories and spare parts not recommended by Bender.
• Catastrophes caused by external influences and force majeure.
• Mounting and installation with device combinations not recom-
mended by the manufacturer.
This operating manual and the enclosed safety instructions must be observed by all persons
working with the device. Furthermore, the rules and regulations that apply to accident prevention
at the place of use must be observed.
1.7 Disposal of Bender devices
Abide by the national regulations and laws governing the disposal of this device.
For more information on the disposal of Bender devices, refer to
www.bender.de > Service & support.

RCM410R-x_D00403_02_M_XXEN / 10.2022 7
LINETRAXX® RCM410R-24/-2
1.8 Safety
If the device is used outside the Federal Republic of Germany, the applicable local standards and
regulations must be complied with. In Europe, the European standard EN 50110 applies.
I Danger! Risk of electrocution due to electric shock! Touching live parts of the system
carries the risk of:
- A fatal electric shock
- Damage to the electrical installation
- Destruction of the device
Before installing the device or working on its connections, make sure that the installation
has been de-energised. The rules for working on electrical systems must be observed.
1.9 Intended use
The RCM410R devices in conjunction with the specified measuring current transformers (CT) are
intended for AC and pulsed DC sensitive residual current measurement according to IEC 62020-1.
Its area of application is the monitoring of residual currents IΔfor preventive maintenance in TN,
TT and IT systems with IΔ≤ 50 A rms, where IΔis intended to be measured within a range of
f= 42…70 Hz.
The devices are intended for operation in control cabinets or similarly protected environments.
For intended operation, observe the specifications in the manual.
Any other use than that described in this manual is regarded as improper.

8 RCM410R-x_D00403_02_M_XXEN / 10.2022
Function
2 Function
2.1 Device features
• AC and pulsed DC sensitive residual current monitor type A accord-
ing to DIN EN IEC 62020-1
• r.m.s. value measurement
• Residual operating current: 10mA…30A (42…70Hz)
• Prewarning: 50...100 % of the residual operating current
• Supply voltage DC 24 V (RCM410R-24) or
AC/DC 100…240 V (RCM410R-2)
• LED-strip measured value display
• Adjustable response delay
• Alarm relay (designed as changeover contact)
• N/C or N/O operation and fault memory behaviour selectable
• RS-485 with Modbus RTU
• Continuous CT-connection monitoring
• NFC interface for device parameter setting with the device engerised
or de-energised
2.2 Functional description
Once the supply voltage Usis applied, the start-up delay tstarts. During this period, exceeding the
residual operating current has no influence on the switching state of the alarm relay. The residual
current measurement is carried out via an external measuring current transformer. If the meas-
ured value exceeds the value of the prewarning and/or the residual operating current, the set re-
sponse delay ton starts.
After ton has elapsed, the alarm relay switches and the corresponding alarm LED lights up. If the
value falls below the release value before ton has elapsed, no alarm is signalled: The LEDs AL1, AL2
do not light and the alarm relay does not switch. The set release time toff starts if the measured
value falls below the release value again after the alarm relay has switched. Once toff has elapsed,
the alarm relay switches back to its initial position. When the fault memory is enabled, the alarm
relay remains switched until the T/R button is pressed > 1 s and < 3 s.
The T/R button can also be used to test the device, to enable and disable the NFC function, as
well as to set the Modbus device address.
2.2.1 Connection monitoring
The connections to the measuring current transformer are continuously monitored. In the event
of a fault, the alarm relay switches and the status LED flashes yellow. After the fault has been elim-
inated, the alarm relay automatically switches back to its initial position and the status LED lights
up green. When the fault memory is enabled, the alarm relay only switches back to its initial posi-
tion when the T/R button is pressed > 1 s and < 3 s. Until then the status LED flashes yellow.

RCM410R-x_D00403_02_M_XXEN / 10.2022 9
LINETRAXX® RCM410R-24/-2
2.2.2 Manual self test
By pressing the T/R button > 3 s and < 6 s, the device simulates a residual current with the value
1.5 x IΔn. All LEDs light up and the relay switches. When the fault memory is enabled, the alarm
LEDs and the relay remain active until the fault memory is cleared by means of the T/R button.
2.2.3 Malfunction
If an internal malfunction occurs, the status LED lights up RED. The error code can be queried via
the device interfaces.
2.2.4 Alarm assignments to the alarm relay
The messages "Device error", "Residual operating current IΔn", "Prewarning", "CT connection fault"
and/or "Test" can be assigned to the alarm relay via the device interface.
2.2.5 Delay times tb, t, ton, and toff
The times tb, t, ton and toff described below delay the output of alarms via LEDs, relay and Modbus
RTU.
2.2.5.1 Recovery time tb
The recovery time is the time the device needs to be ready for measurement after the supply volt-
age Ushas been connected.
2.2.5.2 Start-up delay t
After the supply voltage UShas been connected, the measuring function is delayed by the set
time t(0…999 s) plus the recovery time tb.
2.2.5.3 Response delay ton
If a residual operating current is exceeded, the residual current monitor requires the response
time tan to output the alarm. A set response delay ton (0…10 s) is added to the device-specific op-
erating time tae and delays signalling:
Response time tan = tae + ton
If the fault does not persist during the response delay, the alarm is not signalled.
2.2.5.4 Delay on release toff
If the alarm no longer exists and the fault memory has been disabled, the alarm LEDs go out and
the alarm relays switch back to their initial status. By means of the delay on release (0…999 s), the
alarm state is maintained for the selected period.
2.2.6 Factory settings FAC
There are two ways to carry out a reset:
2.2.6.1 Factory settings without interface
After the factory settings have been restored, all previously changed settings are reset to the state
upon delivery. The settings for the Modbus interface are not reset.

10 RCM410R-x_D00403_02_M_XXEN / 10.2022
Function
2.2.6.2 Factory settings with interface
After the factory settings have been restored, all previously changed settings including the set-
tings for the Modbus interface and the device address are reset to the state upon delivery.
2.2.7 Combined function button (T/R button)
Reset = pressing the T/R button > 1 s < 3 s
Test = pressing the T/R button > 3 s < 6 s
NFC = pressing the T/R button > 6 s < 10 s
Addr. = pressing the T/R button > 10 s < 15 s
2.2.8 Fault memory
The fault memory can be enabled or disabled. Stored alarms are reset by pressing the T/R button
> 1 s and < 3 s when the fault memory is enabled. The fault memory is factory-set to enabled.
2.2.9 NFC interface
The NFC interface can be used to transmit a previously configured device parameter setting
directly to the RCMS410.
i
This function is available only via the Bender Connect App. You can find this app in the
Appstores for iOS and Android.
In the Bender Connect app the device first needs to be made known.
Then the device-specific setting options are shown so that they can be
configured. When the data is transferred, feedback is given whether the
parameter configuration has been successful.
The NFC antenna is located at the front on the righthand side of the
RCMS410. Parameter settings can be configurd via the Bender Connect
app by holding the mobile phone to the NFC logo at the front or at the
right sidewall.
To a de-energised device, a parameter setting can be transferred via the
Bender Connect app. This setting is then activated automatically when
the device is connected to the current supply.
Parameters can be configured via the Bender Connect App also when
the device is energised. To this end, the NFC interface first needs to be
activated in the device via the T/R button at the front of the device or via
the Modbus interface.

RCM410R-x_D00403_02_M_XXEN / 10.2022 11
LINETRAXX® RCM410R-24/-2
3 Mounting and connection
i
Only qualified personnel are permitted to carry out the work necessary to install, com-
mission and run a device or system.
I risk of electrocution due to electric shock! Touching live parts of the system carries the
risk of:
- A fatal electric shock
- Damage to the electrical installation
- Destruction of the device.
Before installing the device or working on its connections, make sure that the installation
has been de-energised. The rules for working on electrical systems must be observed.
3.1 Mounting
Abb. 3–1 Dimensions in mm
Screw mounting
DIN rail mounting
100
M4
Nm
1.0
!
1.
2.
2.
1.
Click!
Mounting Removal
18
8,8
100 109 93
64
48,5
45
1
35
2 x Ø 4,2

12 RCM410R-x_D00403_02_M_XXEN / 10.2022
Mounting and connection
3.2 Connection of RCM410R-24/-2
3.2.1 Connections
Abb. 3–2 Connections of RCM410R–24 and RCM410R–2
The cables are connected to the device via push-in terminals. The maximum permissible conduc-
tor cross section is 1.5 mm².
I Caution! Short circuit. When finely stranded cables are inserted directly into the push-in termi-
nals, spliced wires can cause a short circuit. Use ferrules.
The terminals only allow the use of ferrules from 0.25 mm² to 1.5 mm². The maximum cross sec-
tion of 1.5 mm² should under no circumstances be exceeded!
Use crimping pliers which
1. do not exceed the permitted crimp width of the ferrule and
2. do not leave strong crimp impressions on the ferrule.
i
For a cross section of 0.75 mm² or more, use suitable crimping pliers similar to the mod-
els "CRIMPFOX 6", "Weidmüller PZ6" or "Weidmüller PZ6/5".
i
For UL applications:
Use 60 °C/75 °C copper lines only!
Terminal Connection
A1, A2 Supply voltage Us
S1, S2 Measuring current transformer
11, 14, 12 Alarm relay K1
++24V
–Ground
ARS-485 A
BRS-485 B
A
B
+
–
14 12 11
24 V COM K1
S2 S1
A2
A1
US
CT
RCM410R-2
S2 S1
CT
RCM410R-24
≠ 8 >1.5
81.5
81.5
≠ 8 >1.5
81.5
81.5
≠ 8 >1.5
81.5
81.5

RCM410R-x_D00403_02_M_XXEN / 10.2022 13
LINETRAXX® RCM410R-24/-2
3.2.2 Wiring diagrams
Abb. 3–3 Wiring diagrams RCM410R–24 and RCM410R–2
i
For UL applications:
The measuring current transformers must be connected before operation is started.
3.2.2.1 Supply voltage US
Both device variants can be operated with a voltage of
DC +24 V. The connection is made at the
bottom side of the device.
The RCM410R-2 can be alternatively operated via terminals
A1 and A2 with a voltage of AC/DC 100…240 V. In this case, the
device must be provided with a back-up fuse. The connection is
made at the top side of the device.
If the device is supplied by an unearthed system, two back-up
fuses are required.
S2
L1 L2 L3 N
Verbraucher
Load
S1
RS-485
B
A
–
+24 V
+
11
14
12
S1 (k)
S2 (l)
S1 S2
11 12 14
BA-+
RCM410R-24
S2
L1 L2 L3 N
Verbraucher
Load
S1
A1
US
~/+ ~/–
A2
RS-485
B
A
–
(+24 V) optional
+
11
14
12
S1 (k)
S2 (l)
A1
A2
S1 S2
11 12 14
BA-+
RCM410R-2
S2
L1 L2 L3 N
Verbraucher
Load
S1
A1
US
~/+ ~/–
A2
RS-485
B
A
–
(+24 V) optional
+
11
14
12
S1 (k)
S2 (l)
A1
A2
S1 S2
11 12 14
BA-+
S2
L1 L2 L3 N
Verbraucher
Load
S1
A1
U
S
~/+ ~/–
A2
RS-485
B
A
–
(+24 V) optional
+
11
14
12
S1 (k)
S2 (l)
A1
A2
S1 S2
11 12 14
BA-+

14 RCM410R-x_D00403_02_M_XXEN / 10.2022
Mounting and connection
3.2.2.2 Measuring current transformer connection
i
Ensure that the measuring current transformers are connected correctly. Terminal S1
must be connected to terminal "S1" (k) of the measuring current transformer. Terminal
S2 must be connected to terminal "S2" (l) of the measuring current transformer.
i
For further information on the connection of measuring current transformers, refer to
the corresponding manuals of the measuring current transformers. The installation in-
structions specified there must be observed.
Suitable measuring current transformers
CTAC series W series WF series WR series WS series
CTAC20(/01) W20 WF170-1/-2 WR70x175S WS20x30
CTAC35(/01) W35 WF250-1/-2 WR115x305S WS50x80
CTAC60(/01) W60 WF500-1/-2 WR150x350S WS80x120
CTAC120(/01) W120 WF800-1/-2 WR200x500S WS20x30-8000
CTAC210(/01) W210 WF1200-1/-2 WR70x175SP WS50x80-8000
W20-8000 WF1800-1/-2 WR115x305SP
W35-8000 WR150x350SP
W60-8000 WR200x500SP
i
Attention! Measuring current transformers of the WF series… can only be employed
when CT monitoring at the RCM410R-x is deactivated. Deactivation is effected via
Modbus and register 32111 or via the Bender Connect App. After the deactivation a CT
error is signalled only by the LED on the RCC420 of the WF-series measuring current
transformer.
3.2.2.3 RS-485 interface
Specification
The RS-485 specification restricts the cable length to 1200m and requires a daisy chain connec-
tion.
S2 S1
CT
PE
L1
L2
L3
N
S1(k) S2(l)
S1
S2 S2(l)
S1(k)
RCM410R... Measuring current transformer
B
A
B
A
B
A
B
A
max. 1 m
max. 1200 m
120 Ω
120 Ω

RCM410R-x_D00403_02_M_XXEN / 10.2022 15
LINETRAXX® RCM410R-24/-2
A twisted-pair, shielded cable must be used as bus cable. For example, cable type J-Y(St)Y
nx2x0.8 mm² is suitable. The shield must be connected to PE at one end.
i
If there are more than 16 bus devices, the interface must be designed to be shockproof,
because the maximum permissible total leakage current of 0.5 mA is exceeded.
Termination
The bus cable must be terminated at both ends with resistors (120 Ω, > 0.25 W). The terminating
resistors are connected in parallel to the terminals A and B.
3.2.2.4 Relay
i
Attention! High contact currents damage the hard gold plating of the relay contacts.
Damaged contacts prevent the relay from switching correctly at low contact currents.
The terminals 11, 14, 12 are relay outputs of the measuring sensor. The following settings can be
made via the interface:
Function State Description
Test on | o This parameter determines whether the relay is actuated during a test
Operating mode N/O principle | N/C principle This parameter determines the operating mode of the relay.
N/O principle = coil is energised during alarm state
N/C principle = coil is energised during normal operation
Main alarm on | o The relay switches if the residual operating current has been exceeded
Prewarning on | o The relay switches if the prewarning threshold has been exceeded
Device error on | o The relay switches if a device error exists
CT connection fault on | o The relay switches if a measuring current transformer connection fault exists
B
A
RS-485
120 Ω
> 0.25 W
S2
L1 L2 L3 N
Verbraucher
Load
S1
A1
US
~/+ ~/–
A2
RS-485
B
A
–
(+24 V) optional
+
11
14
12
S1 (k)
S2 (l)
A1
A2
S1 S2
11 12 14
BA-+

16 RCM410R-x_D00403_02_M_XXEN / 10.2022
Operation and settings on the device
4 Operation and settings on the device
4.1 Control panel RCM410R
Control panel RCM410R-24/-2
4.1.1 STATUS LED
Multicoloured display of various operating modes.
ON
Bender
RCM410R
T / R
ton(s)
Ext 10 42
1
0,8
0,6
0,40,20
I∆n(A)
Ext 30 10 5
1
0,5
0,3
0,1,03,01
25
%
50
75
%
100
2
AL
1
S2S1
**
A2A2
A1A1
11 14 12
BA-+
A
B
C
D
E
F
Control panel
ASTATUS LED ON – operating modes
BALARM LEDs – AL1 / AL2
CVALUE DISPLAY LEDs – 25, 50, 75, 100 %
DPOTENTIOMETER 1 – Residual operating current IΔn
EPOTENTIOMETER 2 – Response delay ton
FT/R BUTTON –Test/Reset
ON
Bender
RCM410R
T / R
ton(s)
Ext 10 42
1
0,8
0,6
0,40,20
I∆n(A)
Ext 30 10 5
1
0,5
0,3
0,1,03,01
25
%
50
75
%
100
2
AL
1
S2S1
**
A2A2
A1A1
11 14 12
BA-+
LED Operating mode
GREEN START PHASE
Device booting after start
NORMAL OPERATION
Device in fault-free state
YEL-
LOW
flashing
CT FAULT
CT connection fault
RED DEVICE ERROR
Restart or replacement of the device required.
BLUE
flashing
NFC ACTIVE

RCM410R-x_D00403_02_M_XXEN / 10.2022 17
LINETRAXX® RCM410R-24/-2
4.1.2 ALARM LEDs
Display of prewarning AL1 and main alarm AL2.
4.1.3 VALUE DISPLAY LEDs
Display of the measured value as a percentage of the residual operating current IΔn (incl. relative
uncertainty)
4.1.4 Potentiometer residual operating current IΔn
Setting of the residual operating current IΔn.
ON
Bender
RCM410R
T / R
ton(s)
Ext 10 42
1
0,8
0,6
0,40,20
I∆n(A)
Ext 30 10 5
1
0,5
0,3
0,1,03,01
25
%
50
75
%
100
2
AL
1
S2S1
**
A2A2
A1A1
11 14 12
BA-+
LED Operating state
AL1 PREWARNING
Lights permanently when the prewarning threshold (%
value of IΔn) has been exceeded.
AL2 MAIN ALARM
Lights permanently when the residual operating current
threshold IΔn has been exceeded.
ON
Bender
RCM410R
T / R
ton(s)
Ext 10 42
1
0,8
0,6
0,40,20
I∆n(A)
Ext 30 10 5
1
0,5
0,3
0,1,03,01
25
%
50
75
%
100
2
AL
1
S2S1
**
A2A2
A1A1
11 14 12
BA-+
LED Operating state
25 Lights permanently when the present measured value is
above 25 % of IΔn .
50 Lights permanently when the present measured value is
above 50 % of IΔn .
75 Lights permanently when the present measured value is
above 75 % of IΔn .
100 Lights permanently when the present measured value is
above 100 % of IΔn .
ON
Bender
RCM410R
T / R
ton(s)
Ext 10 42
1
0,8
0,6
0,40,20
I∆n(A)
Ext 30 10 5
1
0,5
0,3
0,1,03,01
25
%
50
75
%
100
2
AL
1
S2S1
**
A2A2
A1A1
11 14 12
BA-+
In switch position "Ext", the values can be
changed via the Modbus RTU interface.
If a fixed value is set at the potentiometer, this
value is always valid. In this case, no other re-
sidual operating current can be set via Modbus
RTU.
If IΔn is exceeded, the main alarm AL2 is trig-
gered.
The prewarning is a percentage value of IΔn .
The value can only be set via the Modbus RTU
interface.

18 RCM410R-x_D00403_02_M_XXEN / 10.2022
Operation and settings on the device
4.1.5 Potentiometer response delay ton
Setting of the delay time ton.
4.1.6 T/R BUTTON
The T/R button activates dierent operating modes depending on how long it is pressed.
Overview
4.1.6.1 "Reset" function
The "Reset" function resets stored alarm states.
4.1.6.2 "Test" function
The "Test" function simulates a residual current of 1.5 x IΔnfor a period of
5 seconds. During this period, the device has the following states:
• Display of the alarm value via the LEDs and the interface.
• The relays switches if the alarm assignment "Test" has been activat-
ed.
• The test status can be read out via the interface:
– 0 = no test
– 1 = internal test
– 2 = external test (interface)
• ton and toff are set to 0 s for the duration of the test
The residual operating current and the pre-
warning must be exceeded at least for the du-
ration of the set response delay ton to trigger
the respective alarm. The amount by which the
response value is exceeded is not relevant.
Only with the switch in position "Ext" can the
parameter be changed via the interface.
The set response delay ton is added to the oper-
ating time tae .
ON
Bender
RCM410R
T / R
ton(s)
Ext 10 42
1
0,8
0,6
0,40,20
I∆n(A)
Ext 30 10 5
1
0,5
0,3
0,1,03,01
25
%
50
75
%
100
2
AL
1
S2S1
**
A2A2
A1A1
11 14 12
BA-+
Mode Period STATUS LED
Reset 1 s to 3 s ashes yellow
Test 3 s to 6 s ashes red
NFC 6 s to 10 s ashes blue
Addr. 10 s to 15 s ashes green
ON
Bender
RCM410R
T / R
ton(s)
Ext 10 42
1
0,8
0,6
0,40,20
I∆n(A)
Ext 30 10 5
1
0,5
0,3
0,1,03,01
25
%
50
75
%
100
2
AL
1
S2S1
**
A2A2
A1A1
11 14 12
BA-+

RCM410R-x_D00403_02_M_XXEN / 10.2022 19
LINETRAXX® RCM410R-24/-2
4.1.6.3 "NFC" function
The "NFC" function can be enabled or disabled. The NFC function is enabled by pressing the T/R
button for a period of 6 s to 10 s. The status LED indicates when the NFC function is enabled. The
LED then lights green with blue flashes. The enabled NFC function can be disabled by pressing
the T/R button again for a period of 6 s to 10 s. Otherwise, it is automatically disabled after 5 min.
4.1.6.4 "Addr." function
The "Addr." function puts the device into the address setting mode for the RS-485 interface. The
LED measured value display and the status LED indicate the devices address.
How to enter an address:
1. Press T/R button until the status LED flashes green.
– After the T/R button
is released, the status LED lights RED.
2. Set HUNDREDS DIGIT. Press T/R button briefly until the desired value appears. Press and
hold T/R button once (> 2 s) to confirm.
– After the T/R button is released, the status LED lights GREEN.
3. Set TENS DIGIT. Press T/R button briefly until the desired value appears. Press and hold
T/R button once (> 2 s) to confirm.
– After the T/R button is released, the status LED lights BLUE.
4. Set UNITS DIGIT. Press T/R button briefly until the desired value appears. Press and hold
T/R button once (> 2 s) to confirm.
5. To exit the address setting mode, press and hold T/R button once (2 s).
– After the T/R button is released, the status LED lights GREEN.
The address values are displayed via BCD code.
Addresses can only be entered within the valid address range. The valid address range is protect-
ed on the software side by an input mask.
1 5 3 Current address: 153
Factor
4
1
2
8
x100 x10 x1
Sum

20 RCM410R-x_D00403_02_M_XXEN / 10.2022
Modbus settings
5 Modbus settings
5.1 Overview
Description of the Modbus registers for RCM41x devices. The following Modbus function codes
are supported:
• Holding register for reading out values
(Read Holding Register; function code 0x03)
• Register for device programming
(Write Multiple Registers; function code 0x10)
For a complete Modbus protocol specification, visit http://www.modbus.org.
5.1.1 Read and write accesses
RO READ ONLY (read access only)
RW READ/WRITE (read and write access)
WO WRITE ONLY (write access only)
5.1.2 Data types
Float IEEE754 32-bit (single precision oating point number)
Int16 Signed 16-bit integer
Int32 Signed 32-bit integer
Uint16 Unsigned 16-bit integer
Uint32 Unsigned 32-bit integer
String UTF8 ASCII character string
5.1.3 Register areas
Area Start address End address
Info 0 999
Measured values 1000 1999
Alarm status 2000 2999
Range 3000 3999
Test status 4000 4999
Area Start address End address
CT status 5000 5999
Modbus RTU parameters 32000 32099
Parameters 32100 32199
Device error codes 58000 58999
Control commands 60000 60099