10
EN
ISOM K-20 - 551805A - SOCOMEC
IMPORTANT:
• When connecting, make sure you separate the low voltage (LV) section and the safety extra-low voltage
(SELV) section to prevent any risk of electric shock.
• Conductors should be clamped as close as possible to the terminals to avoid them detaching themselves
and reducing the insulation distances.
• The 24 VDC auxiliary power supply must be galvanically separated from the monitored network.
Description of the terminals
AUXILIARY POWER SUPPLY
1
ISOM K-20 AC (4725 0110)
110-230 VAC 50/60Hz,
120-240 VDC
ISOM K-20 DC (4725 0111)
24 Vdc ±10% galvanically separated
from the monitored network
U / PE CONNECTION
2
L1 - L2 - KE
24-277 VAC L/N
24-480 VAC L/L’
24-240 VDC +/-
FE ( )
3
L / + N / -
N / -
L / +
L1
KE
L2
CAT.III
1A gG / BS 88 1 A gG / T1AH300VDC
2x OUTPUT RELAYS
4
Alarm 2
22
21
24
12
11
14
Alarm 1
The relay's dry contacts should be protected with a 2A gG fuse
=> use up to 2A with resistive load.
Or T3AH250V => use up to 3A with resistive load.
It is not permitted for use on a 230VAC/30 VDC relay or a SELV signal.
You can use different phases on the 2 output relays, but they must be from
the same three-phase network
TEST / RESET
5
Connecting K-20
Dry contacts
Max. length < 3 m
FE
L2
L1
KE
FE
L2
L1
KE
Not allowed
Authorised
