Hitachi RCI-1.0FSN3 Service Manual page 165

4 Electrical wiring

Expansion valve box terminal board
DX-Interface EXV-(2.0-10.0)E1
Exp. valve
box

Terminal board connections and remarks
Terminal board 1
Mark Item Name
DUTY V: Duty control by voltage (0~10V) (0~5V) (optional):
1 V+
V+: Output power to device (+24Vdc)

2 D D: Voltage input (0~10V) (0~5V)
3 N N: GND
4 1
CO2 signal (optional):

Free contact: By closing the signal, the fan speed is set to High mode.
5 2
EC1: PWM Output control for EC FAN 1 (optional):
6 T
T: Tach input signal (Hz)

7 P P: PWM output signal (0-100%)
8 G G: GND
EC2: PWM Output control for EC FAN 2 (optional):
9 T
T: Tach input signal (Hz)

10 P P: PWM output signal (0-100%)
11 G G: GND
DUTY A: Duty control by current (4~20mA) (optional):
12 V+
V+: Output power to device (+24Vdc)

13 D D: Current input (4~20mA)
14 N N: GND
15 1
FS: Flow switch (optional):

Free contact between terminals 1(15) and 2(16)
16 2
17 1 CONTROL: H-LINK and remote controller comunication (Necessary):
The H-LINK transmission between outdoor unit and indoor unit is 2 wired to
18 2
terminals 1-2.

19 A
The Remote controller must be connected between pins A and B
(non polarity)
20 B
N O T E
(*1): If fan wiring length is higher than 3m, use shielded wires in compliance with local codes.
153
SMGB0077 rev.0 - 01/2013
Description
Wire and maximum current
specification (EN60335-1)
Wire section: 3x0,5mm2
Note: Maximum power by
24Vdc output: 3watts
Wire section: 2x0,5mm2
Wire section: 3x0,5mm2
(*1)
Wire section: 3x0,5mm2
(*1)
Wire section: 3x0,5mm2
Note: Maximum power by
24Vdc output: 3watts
Wire section: 2x0,5mm2
Wire section: 2x0,5mm2
Wire section: 2x0,5mm2
4