Panasonic CZ-256ESMC2 Operation Manual page 100

16 Installation (Electric) and Service Instructions
Wiring
3
Always shut off the power supply (breaker) before installing or uninstalling.
Connection terminals
100-240V~
Power connector
panel
Communications
connector panel
Terminal names and uses
ADAPT +/- Communication adaptor control wire (RS-485)
:
LINK 1/2 : Inter-unit control wire (HBS)
P1 : Pulse meter input (Gas flow meter, fuel meter)
P2 - 3 : Pulse meter input (Electricity meter)
DI 1 : All stop input
DI 2 : All start input
DI 3 : reserved
DO 1 : All alarm output
DO 2 : All operation output
Basic wiring diagram
Wire up the communication adaptor control wire and Inter-unit control
wire as shown in the fi gure below.
Intelligent Controller
Inter-unit control wire
Communication
adaptor control
wire
Communication adaptor
Inter-unit control wire
W
G
G: Gas flow
meter
W: Electricity
meter
* When connecting link systems (inter-unit control wires), always connect
beginning with LINK1 and LINK2 on the Intelligent Controller. Up to 4 link
systems can be connected.
(1) Power supply connection
Connect the power supply to the commercial power mains
(100 to 240 V AC), using a dedicated circuit.
Connect the power supply lines to the L and N power supply
terminals (the power supply neutral to the N terminal).
Connect an earth ground line to the
terminal.
Attach the power supply terminal board cover.
Firmly secure the power lines using the supplied cable tie.
(2) Signal connection
 Connect indoor and outdoor signals using 0.5 - 2.0 mm
two-conductor cable.
 Overall length of each signal line should be 1 km or less.
 Use the shielded wire for inter-unit control wiring.
 Do not run signal lines through the same conduit as
power supply lines, use the same cable as the power
supply, or run close to the power supply lines (maintain
at least 30 cm separation, if cabled outside the control
box).
 Do not run the LINK1 and LINK2 signal lines through the
same conduit, use the same cable for wiring, or run the
signal lines close together.
 Earth the shield wire of the Inter-unit control wire (U1-U2).
98
power supply
2
Use this screw when connecting the shield
for the Inter-unit control wiring to ground.
Wiring procedure
 Inter-unit control wire (no polarity)
Connect signal terminals 0 and 1 (LINK1) to the Inter-
unit control wire terminals of an indoor or outdoor unit.
If using two link systems for connection, connect signal
terminals 3 and 4 (LINK2) in the same manner.
 Communication adaptor control lines (note + and -
polarity)
Up to seven external communication adaptors can be
connected to the control unit (see fi gure at left). However,
a maximum of four links is supported. Be sure to follow
the communications adaptor Installation Instructions
when connecting the adaptors. Make sure that power
lines are not connected to the communication adaptor
terminals or Inter-unit control wire terminals.
* If the power voltage is accidentally applied to the Inter-
unit control wire terminals, a fuse will blow to protect the
controller board. If this happens, disconnect the power
line, and connect the Inter-unit control wire to the spare
U2 terminal. (The other signal line can stay connected to
the U1 terminal.) The spare U2 terminals are right next to
the main U2 terminals.
Use terminal 2 (LINK1-U2) instead of terminal 1
Use terminal 5 (LINK2-U2) instead of terminal 4
Power supply terminal
board cover
Cable tie