Panasonic S-LINK V, User Manual

Page: 26 / 182

26
Chapter 1
If you have to connect a DC 2-wire output device to an input unit, recommend our product.
If a product manufactured by another company is used, the conditions should be checked by follow-
ing the procedure shown in the following flowchart.
This is because the output device of another company does not fit our input unit.
CAUTION
DC 2-wire output device should be
used
Our product is used
Connection is possible without any
bleeder resistor
Connection is possible if the R
B1
bleeder resistor is attached
Connection is possible if the R
B2
bleeder resistor is attached
Connection is possible if the R
B1
or R
B2
(small value) bleeder resistor is attached
Condition A
Normal connection
Connection to the S-LINK V system
is not possible
The bleeder resistance is necessary
Condition B
Decision of condition
Check 1
21.6V-V
THON
≥ V
A
and
21.6V-V
THOFF
=In specified op -
eration voltage range
YES
NO
NO
NO
Condition B
Condition B
YES
Condition A
Condition A
YES
YES
NO
Check 2
≥ Minimum load current
21.6V-V
A
R
i
Check 3
≥ A
1
(Leakage current
in OFF mode)
V
THOFF
R
i
Calulation of bleeder resistance
Minimum load current-
21.6V-V
A
R
B1
≤
21.6V-V
A
R
i
Calulation of bleeder resistance
A
1
-
V
THOFF
R
B2
≤
V
THOFF
R
i
Decision of condition
V
A
: Residual voltage in ON mode
A
1
: Leakage current
V
TH
: Input voltage of input unit
V
THON
: Input unit ON voltage
V
THOFF
: Input unit OFF voltage
R
i
: Input impedance
R
B
: Bleeder resistance
Connection of DC 2-Wire Output Device to Input Unit