Bender RCMB300, RCMB301 Series Manual
RCMB300 series
AC/DC sensitive residual current monitoring module
RCMB300 series_D00372_01_Q_XXEN/06.2019
Quick-start guide
EN
RCMB300 series
c
ae
e
c
a
a
e
Part of the device documentation in addition to this quick-start guide is the enclosed "Safety
i
instructions for Bender products" and the operating manual. This quick-start guide applies to the
following devices:
Type Supply voltage Response value/variant Order number
RCMB301 DC 24 V (19.2…28.8 V ) 30 mA…3 A/Modbus RTU B74043100
Intended use
The residual current monitoring modules of the RCMB300 series are intended for measuring AC
and DC fault currents in earthed systems (TN and TT systems). The modules are able to measure
residual currents up to I
= 20 A in a frequency range of DC…100 kHz.
Δ
Any other use than that described in this document is regarded as improper. This quick-start
guide does not replace the operating manual of the device. Download: www.bender.de/manuals
Safety instruction
DANGER of electrocution due to electric shock!
Touching live parts of the system carries the risk of:
I
- An electric shock
- Damage to the electrical installation
- Destruction of the device
Before installing and connecting the device, make sure that the installation has been de-energised. Observe the rules for working on electrical installations.
Dimension diagrams RCMB30... + CTBC... (all dimensions in mm, tolerance ±0.5 mm)
d
b
c
f
b
d
f
g
RCMB30… + CTBC20(P)/CTBC35(P) RCMB30… + CTBC60(P) RCMB30… + CTBC120(P)/CTBC210(P)
a
b
RCMB30…
2 RCMB300 series_D00372_01_Q_XXEN/06.2019
d
Type a b c d e f g
RCMB30…-CTBC20(P) 81 112 37 ø 20 46 60
RCMB30…-CTBC35(P) 97 130 47 ø 35 46 61
RCMB30…-CTBC60(P) 126 158 57 ø 60 56 78
RCMB30…-CTBC120(P) 188 232 96 ø 120 65 96 139
RCMB30…-CTBC210(P) 302 346 153 ø 210 67 113 277
RCMB30… 74 37 44 2 4.6
d
b
c
f
Dimensions of mountings
34789
RCMB300 series
c
c
Type a b c
CTBC20(P) 31.4 49 2 x ø 5.5
CTBC35(P) 49.8 49 2 x ø 5.5
c
b
a
b
b
a
a
CTBC60(P) 56 66 2 x ø 6.5
CTBC120(P) 103 81 4 x ø 6.5
CTBC210(P) 180 98 4 x ø 5.5
CTBC20(P)/CTBC35(P) CTBC60(P) CTBC120(P)/CTBC210(P)
Assembly
A complete residual current monitoring module consists of the RCMB30… evaluation electronics
and a CTBC20(P)…210(P) series measuring current transformer core. If ordered separately, these
two components must be plugged together and calibrated during commissioning.
Step 1: Place the electronic module on the mark on the
measuring current transformer.
Step 2: Fold the electronic module down onto the
2
3
measuring current transformer.
Step 3: Slide the electronic module onto the plug
1
contacts of the measuring current transformer.
Device view RCMB30…
No. Terminal Meaning
125610
11 12
11 12
K1 K2
21 22 2411 12 14
13 14
1 24 V
2 GND
3 D1
4 DG
5 T/R
6 GND
7 A
8 B
9 X1
10 X2
11 11, 12, 14
12 21, 22, 24
13 –
14 –
Supply voltage U
S
Contact feedback
Connection external test/reset
RS-485 interface
Terminals for cable bridge for connection of the
integrated terminating resistor of the RS-485
interface
Relay K1 (prewarning)
Relay K2 (alarm)
LED: operation "ON" and "Alarm"
Test and reset button "T"
RCMB300 series_D00372_01_Q_XXEN/06.2019 3
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