15
(6) SEN+ Positive sensing input terminal for the sensors
When performing the 4-wire connection, connect terminals 7 and 6
(EXC+ and SEN+).
(7) EXC+ Positive excitation terminal for the sensors
5.1.3 Control input/output connector
(1) EXT IN 1
Control input terminal 1
(2) EXT IN 2
Control input terminal 2
(3) IN COM
Control input common terminal
(4) EXT OUT 1 Control output terminal 1
(5) EXT OUT 2 Control output terminal 2
(6) OUT COM
Control output common terminal
5.1.4 Relay output connector (Option)
(1) COM
Relay output common terminal
(2) LO
Relay LO output terminal
Outputs LO when the measured value is less than the lower limit.
(3) OK
Relay OK output terminal
Outputs OK when the measured value is equal to or greater than the
lower limit and equal to or less than the upper limit.
(4) HI
Relay HI output terminal
Outputs HI when the measured value is greater than the upper limit.
Comparator output
To prevent damage, do not exceed the rated capacities of the output
relays. To protect the output relays, use a varistor, CR circuits or diodes.
5.1.5 Serial communication connector (Option)
In the case of RS-232C:
(1) IC
Internally connected (Do not use)
(2) IC
Internally connected (Do not use)
(3) SG
Signal ground terminal
(4) TxD
Sending terminal
(5) RxD
Receiving terminal
In the case of RS-485 (2-wire connection):
(1) B
B terminal
(2) A
A terminal
(3) SG
Signal ground terminal
(4) B
B terminal
(5) A
A terminal
Summary of Contents for AD-4531B
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