PMML0175A-rev.1 - 6/2008
HARC-MODBUS - xxxxxxxxxxxxxxxx
5
English
HARC-MODBUS - Installation Manual
3. Specifications
Hardware Specifications
Item Specifications
Power supply 1~230V ±10% 50Hz
Consumption 25W (maximum)
Outer dimensions Width: 143mm, Depth: 302mm, Height: 76mm
Weight 1.75kg
Assembling conditions Indoors (in a control panel or desktop)
Ambient temperature 0~40°C
Humidity 20~85% (Without condensation)
MODBUS - Communication with upper system
Item Specifications
K5 Serial Port RS485 (3 Pins connector) - MODBUS Protocol
Communication line Twisted pair cable. Polarity
Communicatrion system Half-duplex, multipoint serial connection
Communication method Non parity or odd/even parity selection. Data lenght: 8 bits (see chapter 5)
Baud rate transmission 19200/9600 Baud (see chapter 5)
Length max. 1200m according EIA-485
H-LINK - Communication with units
Item Specifications
Communication with HITACHI PACKAGED/CHILLER
Communication line Twisted pair shielded cable, non polarity
Communications system Half-duplex
Communication method Asynchronous
Speed of transmission 9600 Bauds
Length of wiring 1000m maximum (total length of HLINK I/O bus)
Maximum number of
HARC MODBUS
8 HARC-MODBUS/H-LINK SYSTEM (PACKAGED)
1 HARC-MODBUS/H-LINK SYSTEM (CHILLER)
Attention::
HARC-MODBUS cannot operate Indoor Units without any Remote Control Switch connected.
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