3.4 Basic input-output module MD1 - WPG
The connecting clamps enable the connection of electrical valves, pumps and other elements of the
heating system to digital outputs Q1 to Q13 which are controlled via analogue inputs A1 to A8
(temperature sensors) and digital inputs D1 to D8.
3
List of inputs and outputs on the internal basic input/output module MD1
Analogue inputs
Digital inputs
Digital outputs
GND – grounding
GND – grounding
SK – phase (230 V / 50 Hz)
A1 – return temp. sensor
D1 – TZ (current protection)
Q1 – heat source
A2 – DHW temp. sensor
D2 – HP (pressure switch)
Q2 – connecting compressor 1
A3 – temp. sensor for outlet water
D3 – LP (pressure switch)
Q3 – main circulation pump
A4 – temp. sensor for inlet water
D4 – flow switch
Q4 – circulating pump for DHW
A5 – external temp. sensor
D5 – remote on/off
Q5 – reserve source
A6 – temp. sensor for supply pipe
for
heating
D6 – thermostat of heating cycle
1
Q6 - reversible valve
A7 – temperature sensor of mixing-
heating cycle 2
D7 – thermostat of heating cycle
2
Q7 – circulation pump of heating cycle
1
A8 – passive cooling temperature
sensor
D8 – external regime switch
Q8 – circulation pump of heating cycle
2
Q9 – mixing valve - opening
Q9 – mixing valve - closing
Q11 – cooling valve
SK – joint phase
Q12 – additional external source
JMP – bridge layout
Q13 – connecting compressor 2
TE1 (connector RJ45) - communication with the expansion V/I MD2 module
TE2 (connector RJ45) - communication with PLC
CAUTION
It is important to correctly connect the inputs and outputs. Incorrect connection can lead to
damage to the device. For the characteristics of inputs and outputs of the basic module MD1
see picture in chapter 3.4.1.
CAUTION
The joint electrical power of the devices which can be directly connected to the regulation
must not exceed 500 W. Otherwise, it is necessary to ensure separate power to the external
devices and to connect control cables to the V/I module.
CAUTION
Circulation pumps with EC drive (energy saving) must not be directly connected to the V/I
module because of capacitive influences. They have to be connected via external power
elements - relays.
