Hitachi SJ Series - Page 80

7-25
Chapter 7
Wire Connection and Optional Devices
7.7 Control Circuit Terminal Area
7.7.1 Switch Configuration
Points to be noted on switches
・Using a switch under power-on
condition may cause failure. Use the
switch only after turning off the power
and confirming that the POWER lamp
on the operator keypad is off.
Description of switches
・If the switch status does not match the
actual input and output specifications, it
may cause failure.
Make sure to check that input and
output to be used and switch
characteristics are the same.
Indication SW name Description
Ai1
(SW1)
Analog input 1 switch
Switches input specification of analog input 1 (Ai1 terminal).
10V: Voltage input is available.
20mA: Current input is available.
Ai2
(SW2)
Analog input 2 switch
Switches input specification of analog input 2 (Ai2 terminal).
10V: Voltage input is available.
20mA: Current input is available.
Ao1
(SW3)
Analog output 1 switch
Switches output specification of analog output 1 (Ao1 terminal).
10V: Output changes to voltage output.
20mA: Output changes to current output.
Ao2
(SW4)
Analog output 2 switch
Switches output specification of analog output 2 (Ao2 terminal).
10V: Output changes to voltage output.
20mA: Output changes to current output.
P.SEL
(SW5)
Switching the method of
power supply to the input
terminals
Switches the method of power supply to the input terminals.
IN: Drives the input terminals using the internal power supply.
EX: Inputs an external power supply to drive input terminals.
(In the case of EX, a power supply is required between the input terminals and COM.)
SRC/SINK
(SW6)
Switch of sink/source for
the input terminals
Switches the sink/source logic for input terminals.
This switch is enabled when SW5 is IN.
SINK: Enables sink logic.
SRC: Enables source logic.
Switch voltage output/current output of analog output 2
Switch voltage output/current output of analog output 1
Switch voltage input/current input of analog input 2
Switch voltage input/current input of analog input 1
Switch internal power supply/external power supply of the
input terminal power supply
Switch sink/source of the input terminal logic
SW4
SW3
SW2
SW1
SW5
SW6
10V
20mA
10V
20mA
10V
20mA
10V
20mA
IN
EX
SINK
SRC
Ao2
Ao1
Ai2
Ai1
P.SE
L
Do
Failure
Do
Failure
Control circuit terminal area
(SW4) (SW3) (SW2) (SW1) (SW5) (SW6)