Daikin EKWHCTRL1, EKRTCTRL1 Installation manuals

INSTALLATION, CONNECTION AND SETTINGS WALL MOUNTED

CONTROL EKWHCTRL1, EKRTCTRL1 FOR USE IN A MODBUS RTU

SERIAL NETWORK

Warnings

This instruction manual forms an integral part of the de­vice and therefore must be carefully preserved and must
ALWAYS travel with it, even if you transfer the device to
another owner or relocate it to other premises.

If the manual gets damaged or lost, download a copy
from the website.

Description

The terminal board +AB- of the INN-FR-B32 Printed circuit
board allows the connection of the same present in the con­trol panels EKRTCTRL1, EKWHCTRL1 and EKWHCTRL0 to a se­rial communication network "Modicon ModBus" RTU.

The EKWHCTRL0 kit can only be installed in combination
with the electronic controls EKWHCTRL1. In this case the
connection from the electronic board INN-FR_B32 is not
necessary because the electronic controls EKWHCTRL1
have a specic serial port to connect.

For a rapid and right assembly of the components follow
carefully the sequences described in the various sections.

All the operations must be performed by qualied person­nel using the required Personal Protective Equipment.

This document is restricted in use to the terms of the law
and may not be copied or transferred to third parties with­out the express authorization of the manufacturer.

A INN-FR-B32 board

Electric connections

Preliminary warnings

Before each intervention:

• disconnect the device from the power mains by turning
the system master switch to "OFF"

• wait for the components to cool down in order to avoid
any burns

1

Make sure that there is no voltage before operating.

Any technical intervention before disconnecting the unit
from the power supply is forbidden.

Access to the printed circuit board

H2H4 AIR

To access the electrical connection area:
– follow the instructions in the installation manual of the

appliance

To access the Printed circuit board:
– access the electrical connection area
– unscrew the xing screws of the electric box
– remove the cover

Electrical connections EKRTCTRL1

For connection of the electronic board to a "Modicon Mod­Bus" RTU serial communication network:
– follow the indication on the connection diagram
– collegarsi al connettore ModBus con serigraa presente

sulla scheda

A Cover of the electrical box
B Fixing screws
C PCB

A

C

B

B

– connect respecting the indication "A" and "B"

For all other connections, refer to the diagrams and in­structions in the installation manual.

+BA- ModBus RTU serial connection
H2 Hot water temperature probe 10 kΩ
AIR Optional air probe
M1 Fan motor DC Inverter
S1 Grid safety microswitch
CP Presence input sensor
Y1 (N-EV1) Water solenoid valve (230 V/50 Hz 1 A power output)
L-N 230 V/50 Hz electrical power supply connection
BO Boiler consent output (free contact max 1 A)
CH Chiller consent output (free contact max 1 A)

N540022B

2

Electrical connections EKWHCTRL1 with on-board Printed circuit board EKWHCTRL0

A ModBus RTU Serial Connection
B Serial connection for fancoil

+

A B

-

A A B B

-

AB

1. Terminal block for device connection

2. The terminal block for CP presence contact connection

3. PCB

For connection of the electronic board to a "Modicon Mod­Bus" RTU serial communication network:
– connect to the terminal block on the wall control unit

For all other connections, refer to the diagrams and in­structions in the installation manual.

The choice of materials and the routing of the connection
are fundamental for correct operation.

Use a bipolar shielded cable suitable for the RS485 serial
connection with a minimum section of 0,35 mm².

Keeping the bipolar cable separate from power supply
cables.

Chase out the wall in order to minimize the length of the
leads.

Complete the line with the 120 Ω resistance.

It is forbidden make "star" connections.

N540022B N540022B

+

A B

-

A A B B

-

CP

1 2

L
N

3

Serial Port Features

Protocol

The serial communication protocol is “Modicon Modbus” in
RTU mode with the following settings:

• baudrate=9600

• data bits=8

• parità=nessuna

• stop bit=1

The implemented functions are:

3

• “03” and “06” respectively for the reading and writing of a
single register

• the main adjustment parameters (R/W), the acquired tem­perature and the operating status are made available

3