Fujitsu AB* A12GATH, Design & Technical Manual

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„ z
Dry contact terminal ([CNA02], [CNA04])
When a power supply is unnecessary at the input device you want to connect, use the Dry
contact terminal ([CNA02], [CNA04]).
1
2
1
2
3
connected unit
P.C.B
GND
Ch 1
Ch 3
*c
*c
*c
*d
Ch 2
CNA02
CNA04
*c: Select very low current use contacts (usable at DC12V, DC1mA or less).
*d: The wiring is different from Apply voltage terminals. Be sufficiently careful when wiring.
When connected to Dry contact terminals of multiple indoor units with a connected unit,
insulate each indoor unit with relay, etc. as shown on below example.
Input device 1
In
do
or u
ni
t
In
do
or u
ni
t
In
do
or u
ni
t
Po
w
er s
up
pl
y f
or r
el
ay
Input device 2
K1 - K6 : Relay
(Device for DC Current)
P.C.B
P.C.B
P.C.B
K1
K4
K5
K6
K2
K3
CNA02
CNA02
CNA02
NOTE :
● When connected to multiple indoor units directly, it will cause breakdown.
- (08 - 11) -
E
X
TE
RNAL
IN
PU
T
&
O
U
TP
U
T
E
X
TE
RNAL
IN
PU
T
&
O
U
TP
U
T