Electrical Connections - Eliwell Coldface EWHT800LX Series Manual

ELECTRICAL CONNECTIONS

Output relay (default settings)
•OUT1 = Dehumidification
•OUT2 = Humidification
•OUT3 = Heating
•OUT4 = Compressor
•OUT5 = Evaporator fan
•OUT6 = Auxiliary 1 (ventilation fans)
•OUT7 = Auxiliary 2 (destratification fans)
•OUT8 = Light
Probe inputs (default settings)
• Pb1 = NTC cold room probe
• Pb2 = NTC defrost end probe
• Pb3 = NTC (de)stratification probe
• Pb4 = NTC condenser fan probe
• Pb5 = Humidity probe / pressure transducer
4...20mA
To switch between NTC/PTC probe types use pa-
rameter H00. SWITCH OFF AND RESTART THE
INSTRUMENT after making the change
RS 485
Bus
Adapter
TTL
TTL
Keyboard
Copy Card
2 3 4 5
OUT8
H28
3 - EN
Analogue Analogue
0...20mA 0...10V PWM
Output - AO Output - AO GND
4..20mA 10V 55mA
39 40 41 39 40 41
RS-485
Analogue
Pb5
Output - AO
39 40 41 45 46 47 51 52 53
RS-485
RS485 connection to
TelevisSystem available
with optional plug-in
EWHT800 LX
module only
14 15 16 17 18 19 20 21 22 23 24
8 9 10 11 12 13
AUX 2 AUX 2 AUX 1 AUX 1
OUT7 OUT6
H27 H26
Digital Inputs (default settings)
• D.I.1 = Door switch
• D.I.2 = Alarm
• D.I.3 = Low pressure
• D.I.4 = High pressure
Analogue Output (default settings)
• AO = 0-10V for piloting external fan module
Serials
• TTL for connection to Copy Card
• TTL for connection to TelevisSystem
• RS485 available ONLY with optional Plugin
module for connection to TelevisSystem.
Important! Make sure the machine is switched
off before working on the electrical connections.
• Removable screw terminals: electric cables
of 2.5 mm maximum cross-section (one wire
2
per terminal in the case of power connections).
• FASTONS: single row of fastons in series.
Pb5 Pb5
GND
+12V
51 52 53
I (4...20mA)
Pb4 Pb3 Pb2 Pb1
DI4
54 55 56 57 59 60 61 62 64 65 66 67 68 69 70 71
25 26 27 28 29 30
+
+
OUT5 OUT4 OUT3 OUT2 OUT1
H25 H24 H23 H22
I
DI3 DI2 DI1
Power
Supply
100...240V
Removable
31 32
Terminals
Faston
- Default configuration
-
LINE
NEUTRAL
Relais
H21 Parameters
EWHT800LX