Hioki 2300 Smart Site, Instruction Manual, Page: 102 / 366

5 2304-21 PULSE MODULE
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APPX
IDX
5.4.3 Insulation of Internal Circuit
In the 2304-21, the input circuit and alarm output are insulated
from the CAN bus as shown in the block diagram below. (With-
stand voltage: 1.4 kVAC, 50/60 Hz, Response current: 5 mA, 1
minute)
The CH1 and CH2 terminals are not insulated from each other.
When measuring two measurement points having a potential differ-
ence, equalize the ground level potential of these two points, or use
another 2304-21 Module, since measurements may be adversely
affected.
Analog
circuit
CH1
/ CH2
Mea
s
ur
em
ent
Inp
u
t
Digital
circuit
In
sula
ting
cir
c
u
it
Module-to-
module com-
munications
circuit
CAN
bus
Con
nec
tor
Mod
u
le
bas
e
Pow
e
r
Insulation
withstand voltage
of 1.4 kVAC
Insulation
withstand voltage
of 1.4 kVAC
AL
ARM
A
la
rm
ou
tput
Ground
The COM terminal of the alarm output terminal is used for both
CH1 and CH2.