32
5-8
．
Status Signals
1. CV operation status output signal
This signal is active while the PA-B series is running in the CV
(constant-voltage) mode.
2. CC operation status output signal
This signal is active while the PA-B series is running in the CC
(constant-current) mode.
3. ALARM status output signal
This signal goes active when the PA-B series enters an alarm
status. It enters the alarm status and turns off output if the
OVP or OHP circuit works.
NOTE: The status signal output terminals shown above are
connected with the transistors at the light receiving elements
of the photo-couplers (TOSHIBA TLP521-1) inside the PA-B
series. See the photo-coupler ratings shown below and use
these signals properly.
※
Maximum rating of photo-coupler TLP521-1
Item
Symbol Max. rating
Unit
Collector-emitter voltage
V
CEO
55
V
Emitter-collector voltage
V
ECO
7
V
Collector current
I
C
50
mA
Output
Collector loss
P
C
150
mW
Total allowable loss
P
T
250
mW
Dielectric strength voltage
BV
S
2500
Vrms
CC
ALARM
CV
COMMON
Connection terminals on rear panel
