
7-41
Chapter 7. PARAMETER SETUP
• Description of Symbols
①
Details
I
0
:
Setting output current of the DCP32 (setting range: 2 to 22 mA)
V
0
:
Max. load discharge voltage (approx. 13.2 V)
V
SSR’
:
Actual input voltage to SSR
V
SSR
:
Input rated voltage range of SSR (
V
SSR/MIN
to
V
SSR/MAX
)
V
SSR/MIN
:
Minimum input rated voltage of SSR
V
SSR/MAX
:
Maximum input rated voltage of SSR
Z
:
Internal impedance of SSR
V
D
:
Internal voltage drop of SSR (normally about 1 to 2 V)
②
Equivalent circuit when one SSR is connected
Formulas (1) and (2) must be satisfied.
V
SSR/MIN
≤
I
0
x Z + V
D
≤
V
0
- - - -(1)
V
SSR’
≤
V
SSR/MAX
- - - - - - - - - - -(2)
(V
SSR’
= I
0
x Z + V
D
)
③
Equivalent circuit when N number of SSRs are connected in series
Formulas (3) and (4) must be satisfied.
V
SSR/MIN
≤
I
0
x Z + V
D
≤
V
0/N
- - -(3)
V
SSR’
≤
V
SSR/MAX
- - - - - - - - - - -(4)
(V
SSR’
= I
0
x Z + V
D
)
I
(V )
0
0
DCP32
SSR
VSSR'
Z
VD
I
(V )
0
0
DCP32
SSR 1
VSSR'
Z
VD
SSR n
VSSR'
Z
VD