Operating manual
Document nr. : 010346
Version :
V1.4
MC 785-DF KLIMA ALFANET
Client : General
Page :
4 of 20
Controller in- and outputs
Sensors
:
Temperature sensor
(Pt-100, 3-wire to DIN/IEC 751)
Defrost sensor
(Pt-100, 3-wire to DIN/IEC 751)
RH sensor
(0/+1 Vdc = 0/+100% RH)
Digital input
:
Day/night input
(potential free input contact)
Analog output
:
Out-1=CH-1; 0/+10Vdc,
(Rbmin 10Kohm, programmable)
Relay outputs
:
RY1 Extra relay
(C/NO/NC, 250Vac/10A not inductive)
Following relays have a central common;
RY2 Dehumidify
(NO, 250Vac/10A not inductive)
RY3 Humidify
(NO, 250Vac/10A not inductive)
RY4 Heating
(NO, 250Vac/10A not inductive)
RY5 Cooling
(NO/NC, 250Vac/10A not inductive)
Please note ! Relay functions are programmable. These are the default settings.
Communcation :
I²C network
1
(2-wire shielded; 0V,SDA,SCL)
RS485 network
2
according to NORM: ANSI/TIA/EIA-485-A-98
(2x Twisted-pair shielded, min. 0,5mm
2
; GND,A,B)
1.2
LMS Relay module
Supply
:
12Vdc / 1,2VA
(from separate supply)
Communication :
I
2
C network
1
(2-wire shielded 0V,SDA,SCL)
Relay outputs
:
RY1 Defrost
(C/NO/NC, 250Vac/10A not inductive)
RY2 Fan
(C/NO, 250Vac/10A not inductive)
RY3 Spare
(C/NO, 250Vac/10A not inductive)
RY4 Spare
(C/NO, 250Vac/10A not inductive)
Please note ! Relay functions are programmable. These are the default settings.
1.3
LMS 4x Pt100 module
Supply
:
12Vdc / 1,2VA
Communication :
I
2
C network
1
(2-wire shielded 0V,SDA,SCL)
Sensors
:
Pt100-1
(3-wire according to DIN/IEC 751, programmable)
Pt100-2
(3-wire according to DIN/IEC 751, programmable)
Pt100-3
(3-wire according to DIN/IEC 751, programmable)
Pt100-4
(3-wire according to DIN/IEC 751, programmable)
1.4
LMS Analog-out module
Supply
:
12Vdc / 1,1VA
(from separate supply)
Communication :
I
2
C network
1
(2-wire shielded 0V,SDA,SCL)
Analog outputs :
Out-1=CH-2; 0/+10Vdc
(Rbmin 10Kohm, programmable)
Out-2=CH-3; 0/+10Vdc
(Rbmin 10Kohm, programmable)
Out-3=CH-4; 0/+10Vdc
(Rbmin 10Kohm, programmable)
Out-4=CH-5; 0/+10Vdc
(Rbmin 10Kohm, highest output percentage
Please note ! Analog functions are programmable.
of CH-1 and CH-2)
1.5
LMS Supply module
Supply
:
230Vac 50/60Hz, 7VA
Outputs
:
3x 12Vdc
1
I
2
C cable:
2-wire shielded cable connect SDA and SCL as wires and connect shield to Gnd (0V).
Maximum length I
2
C cable is 5 meter.
2
RS485 cable:
2xTwisted-pair with in pair-1 line A and B, in pair-2 2xGnd (or 1 wire with Gnd) and shield only
at one side to earth (PE). Make no side branches.
Maximum total length of RS485 cable is 1 KM.
Terminate the cable at both ends by connecting a resistor of 250 Ohm between line A and B.
