Hioki 2300 Smart Site, Instruction Manual, Page: 117 / 366

104
6 2305-20 INSTRUMENTATION MODULE
6.4.2 Insulation of Internal Circuit
In the 2305-20, 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 connecting signals different in potential to these terminals, use
an additional measurement module or insulate the signals externally
before connection to the terminals. This will prevent module errors and
malfunction.
Alnalog
circuit
CH1
/ CH2
Me
asu
rem
en
t
In
put
Digital
circuit
Insu
latin
g
cir
cuit
Module-to-
module com-
munications
circuit
CA
N bu
s
Co
nne
cto
r
Mo
dul
e ba
se
Po
w
e
r
Insulation
withstand voltage
of 1.4 kVAC
Insulation
withstand voltage
of 1.4 kVAC
AL
A
R
M
A
larm
ou
tpu
t
Ground
The COM terminal of the alarm output terminal is used for both
CH1 and CH2.