External I/O Terminal Circuit - Hioki 3154 Instruction Manual

54
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6.1.4 External I/O Terminal Circuit

Signal wire insulation is used to cut down interference
CAUTION
between signals. Be sure to apply protective grounding to
external equipment to be connected to avoid risk of
damaging insulation.
Maximum photocoupler low level output current is 60 mA.
When more than 60 mA current is required, current
amplifier transistor circuit and other external power supply
devices must be connected externally.
External I/O terminal circuit
shematic diagram shown below.
4.7 kΩ(1/4W)
*
：Connect when using internal DC power supply (5 V).
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External Interface
Connected to power cord ground lead
Terminal board pin number
14
Internal power
supply (5 V)
13
INT.DCV
Externa
12
supply
*
(5 V to 30 V)
EXT.DCV
START
11
STOP
10
VOLT0
9
VOLT1
8
VOLT2
7
TEST
6
PASS
5
FAIL
4
*
External power
supply (COM)
3
EXT.COM
Internal power
2
supply
(5 V) (GND)
INT.GND
1
l
power