Relay Driver - Panasonic AQ-G Manual

Cautions for Use of Solid State Relays
Load Inrush Current Wave and Time
(1) Incandescent Lamp Load
i i
o
Incandescent lamp
Approx. 1/3 second
Inrush current/rated current:
i/i ]10 to 15 times
o
(4) Motor Load i/i ]5 to 10 times
O
i
Steady
0.2 to 0.5 second
Starting state
• Conditions become more harsh if plugging or inching
is performed since state transitions are repeated.
• When using a relay to control a DC motor and brake,
the on time inrush current, steady-state current and
off time brake current differ depending on whether
the load to the motor is free or locked. In particular,
with non-polarized relays, when using from B contact
of from contact for the DC motor brake, mechanical
life might be affected by the brake current.
Therefore, please verify current at the actual load.
SSR Driving Circuits

1. Relay Driver

Load
Load power
supply
Vcc
Relay contacts
4. TTL/DTL/IC Driver
Load
Load power
supply
Vcc
TTL, DTL, IC
(2) Mercury Lamp Load
i/i ]3 times
O
i
3 to
5 minutes
The discharge tube, transformer, choke coil,
capacitor, etc., are combined in common
discharge lamp circuits. Note that the inrush
current may be 20 to 40 times, especially if
the power supply impedance is low in the
high power factor type.
(5) Solenoid Load
i/i ]10 to 20 times
O
i
o
i
Free
Lock
Load
Braking
0.07
to 0.1 second
Note that since inductance is great,
the arc lasts longer when power is cut.
The contact may become easily worn.
2. NPN Transistor Driver
Load power
1
supply
2
SSR
3
4
5. C-MOS/IC Driver
(1) SSR fires when IC output is HIGH:
Load power
1
supply
2
SSR
3 Vcc
4
C-MOS IC
Contacts
i C
o
(for high power factor type)
(6) Electromagnetic Contact Load
i/i ]3 to 10 times
O
i
i
o
1 to 2 cycles
(1/60 to 1/30 seconds)
Load
1
2
SSR
Vcc 3
4
NPN Transistor
Load
1
2
SSR
3
4
ー 12 ー
(3) Fluorescent Lamp Load
i/i ]5 to 10 times
O
L
i
10 seconds
or less
(7) Capacitive Load
i/i ]20 to 40 times
O
i
o
i
1/2 to 2 cycles (1/120 to 1/30 seconds)
3. PNP Transistor Driver
Load
Load power
supply
Vcc
PNP Transistor
(2) SSR fires when IC output is LOW:
Load
Load power
supply
Vcc
C-MOS IC
ASCTB400E 201806-T
i
o
i
o
1
2
SSR
3
4
1
2
SSR
3
4