Hitachi SJ300 Series Replacement Manual page 12

3.2 Alarm terminal (NO-NC contact)
(1) In the case of being connected to AL1
Since the AL1 is initially configured as normally closed, it is closed during normal operation, and
opens in case of alarm or power shutoff.
(2) In the case of being connected to AL2
Since AL2 is initially configured as normally open, it is open during normal operation, and
closed in case of alarm or power shutoff.
(3) Contact logic conversion
The alarm contact defaults to normally closed for both J300 and SJ300. Please refer to the
chart 6 for the logic conversion of the contact in the case of the SJ300.
(Please see the figure 14 and 15 for the operation of the contact.)
Terminal
symbol
AL0, AL1, AL2
(4) To seal in the alarm signal
The J300 cannot seal in the alarm signal because the alarm output is cancelled when the main
power is shut off. On the other hand, SJ300 can seal in the alarm signal because the power for
the control circuit can be maintained by using the R0T0 terminals.
To seal in the alarm signal, supply the R0T0 terminals with the power externally after removing
the J51 connection wiring.
Please refer to the Chart 14 and 15 for the alarm relay operation.
Error
Terminal
Function code
symbol
1 C011
2 C012
3 C013
4 C014
5 C015
6 C016
7 C017
8 C018
SJ300 intelligent input terminal logic selection
Function code
C036
SJ300 alarm relay terminal logic selection
Normal or
Power-off
Option code
00
NO
NO
NO
NO
NO
NO
NO
NO
Chart 5
Option code
00
a
Chart 6
Normal
12/24
01
NC
NC
NC
NC
NC
NC
NC
NC
01
b
Error or
Power-off