Hitachi HF-W2000 35 User Manual page 92

(2) List of external control I/O signals
Signal name Connection diagram
CPU side
40 VDC 0.1A
PSDOWN_1,
Contact
PSDOWN_2
CPUSTOP_1,
40 VDC 0.1A
CPUSTOP_2
Contact
MCALL_1,
40 VDC 0.1A
MCALL_2
Contact
GENDO0_1, 40 VDC 0.1A
Contact
GENDO0_2
GENDO1_1, 40 VDC 0.1A
Contact
GENDO1_2
GENDO2_1, 40 VDC 0.1A
Contact
GENDO2_2
WDTTO_1,
WDTTO_2
40 VDC 0.1A
Contact
Terminal # User side
Fuse
5
～
Load
Surge Sup.
18
Fuse
23
～
Load
Surge Sup.
9
Fuse
1
～
Load
Surge Sup.
14
Fuse
2
～
Load
Surge Sup.
15
Fuse
3
～
Load
Surge Sup.
16
Fuse
24
～
Load
Surge Sup.
10
Fuse
4
～
Load
Surge Sup.
17
Explanation
Indicates either the OS is
shut down (standby or
primary power off) or the
power supply to the
Equipment is
disconnected.
Indicates whether the
CPU cannot operate
normally because of
extremely heavy load or
the CPU is hung.
Maintenance call signal.
Indicates that the
temperature, fan rotation
or one side of mirrored
disks (D model only) is
abnormal.
General-purpose output
signal. The user can
define the meaning of the
signal on each contact of
GENDO0 through
GENDO2.
Indicates timeout
detection by the
watchdog timer. A
timeout is detected even
while the OS is shut
down (auxiliary power or
primary power off) or the
power supply to the
Equipment is
disconnected.
4-17
4. SPECIFICATIONS
Contact specification
HJ-7815-21 HJ-7815-22
B contact A contact
 Closed at  Opened at
power-off power-off
(contact B). (contact A).
 Closed at  Opened at
power down. power down.
 Closed at  Opened at
power-off power-off
(contact B). (contact A).
 Closed at  Opened at
CPU stop. CPU stop.
 Opened at  Opened at
power-off power-off
(contact A). (contact A).
 Closed at  Closed at
maintenance maintenance
call. call.
 Opened at  Opened at
power-off power-off
(contact A). (contact A).
 User-defined.  User-defined.
 Closed at  Opened at
power-off power-off
(contact B). (contact A).
 Closed at  Opened at
watchdog watchdog
timer timeout timer timeout
or CPU power or CPU
down. power down.
(Continued on next page)