Installation and connection
27
RCMS460-490_D00067_03_M_XXEN/12.2017
Legend to wiring diagram RCMS490-…
A1, A2 Connection of supply voltage U
S
(see ordering information),
we recommend a 6 A fuse
k1, l …
k12, l
Connection to measuring current transformers CT1…CT12.
Either type A (W…, WR…, WS…, WF… series) or type B
(W…AB series) measuring current transformers can be selec-
ted for each measuring channel. When using up to six type B
measuring current transformers, an AN420-2 or AN110
power supply unit is required (for connections see page 29).
The channels k9…k12 of the device versions RCMS490-D4/-
L4 require the connection of type A measuring current trans-
formers.
A, B BMS bus (RS-485 interface with BMS protocol)
R, T/R External reset button (N/O contact). The external reset but-
tons of several devices must not be connected to one ano-
ther.
T, T/R External test button (N/O contact). The external test buttons
of several devices must not be connected to one another.
C11, C12,
C14
Common alarm relay K1: Alarm 1, common message for
alarm, prewarning, device error.
C21, C22,
C24
Common alarm relay K2: Alarm 2, common message for
alarm, prewarning, device error.
R
on/off
Activate or deactivate the terminating resistor of the BMS
bus (120 Ω )
11, 14 …
121, 124
Alarm relay per channel: One N/O contact per measuring
channel (e.g. N/O contacts 11,14 for channel 1).
CT Measuring current transformers (W…, WR…, WS…, WF…,
W…AB series)
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