ECH 200 BD
9/76
A: alarm output E: relay 1
B: LC filter F: relay 2
C: CF control G: relay 3
D: TK/relay 5 (only for 215 BD) H: relay 4
Instrument configuration is determined by the values of the parameters associated with inputs and outputs.
4.2 Configuration of analogue inputs
There are 4 analogue inputs:
• 3 NTC type temperature probes
• 1 input which may be configured for an NTC probe or a 4...20 mA signal.
The inputs, which shall henceforth be referred to as AI1…AI4, are configured as shown in the table below:
Value
Pa. Description
0 1 2 3 4 5
Pa
H05
Configuration
of analogue
input AI1
Probe
absent
NTC input
Inlet water/air
Digital input
Request for
heating
Digital input
Request for
regulation
algorithm
NTC input
Differential
Not permitted
Pa
H06
Configuration
of analogue
input AI2
Probe
absent
NTC input
Outlet
water/air, anti-
freeze
Digital input,
Request for
cooling
Digital input
for antifreeze
alarm
Not permitted Not permitted
Pa
H07
Configuration
of analogue
input AI3
Probe
absent
NTC input
Condensation
4...20 mA input
for
condensation
4...20 mA input
for dynamic
set point
NTC input
Anti-freeze
for water-
water
machines with
automatic
(internal)
reversing of
coolant gas
NTC probe
Regulation
alogorithm in
heating mode
for water-
water
machines with
manual
reversal on
water side
Pa
H08
Configuration
of analogue
input AI4
Probe
absent
NTC input
Condensation
Multifunctional
digital input
NTC input
Outdoor
temperature
NTC input
Anti-freeze
for water-
water
machines with
automatic
(internal)
reversing of
coolant gas
Not permitted
Connection to
probe AI3
configured as
4..20mA C
Analogue inputs
Analogue inputs:
configuration
table
12AC AI1
ID1
GNDALL GND AI4 AI3 AI2
ID2
12DC TC ID5 ID4 ID3
C
B
Line
A
D E F G H
12AC
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