Terminal Description; Special Conditions - Bosch ME 200 Installationsanleitung Für Den Fachmann

Installation
Connecting terminal of the extra-low voltage side (≤ 24 V)

Terminal Description

BUS Connection of the BUS system to the controller, module, heat
source, e.g. operation as an integrated system from conventional
and alternative heat sources and coding switch setting 1.
BUS addr. Connection of terminal BUS addr. 9-10 to the control unit, module,
e.g. for systems with stand-alone alternative heat source: and
9-10
coding switch setting 10
OA1 Connection of control signal for alternative heat source with I/O
signal (Output Alternative). Function: NO contact
OA2 Connection of control signal for power output specification of
alternative heat source with 0-10 V signal for modulation
(modulation range 35-100 %)
OEV Connection of control signal for blocking of conventional heat source
( configuration in Tab. 12: NC/NO contact).
OR1 Connection of pump of alternative heat source with pulse width
modulation or 0-10 V signal (Output Return)
T1 Outdoor temperature sensor (temperature sensor)
TA1 Alternative heat source flow temperature sensor
(Temperature Alternative)
TB1 Buffer cylinder temperature sensor at top (Temperature Buffer)
TB2 Buffer cylinder temperature sensor at centre
TB3 Buffer cylinder bottom temperature sensor
TB4 System flow temperature sensor
TF1 Alternative heat source flue gas temperature sensor
(Temperature Flue gas), e.g. PT1000
TR1 Alternative heat source return temperature sensor
(Temperature Return)
TR2 Heating system return temperature sensor
Table 6
Connecting terminal of the mains voltage side (≤ 230 V)
Terminal Description
120/ Mains voltage connection
230 V AC
OA3 Connection of control signal for alternative heat source with I/O
signal at mains voltage (Output Alternative). Function: NO contact
1)
PR1 120/230 V AC: pump of alternative heat source (Pump Return);
≤ 24 V: control signal with stand-alone alternative heat source (0-10
V/PWM) for output control
PR2 Connection of pump for heating circuit 1 with stand-alone
alternative heat sources
VB1 Connection mixing valve/3-way valve buffer cylinder return
(Valve Buffer)
VR1 Connection of mixing valve/3-way valve alternative heat source
return (Valve Return)
VR2 Connection of diverter valve to bypass conventional heat source or
for heating circuit pump of a stand-alone alternative heat source
(Valve Return)
1) With stand-alone alternative heat sources (0-10 V/PWM) for output control.
Table 7
36

Special conditions

In a few devices, the terminal for the BUS system is labelled with
EMS.
The two BUS systems must not be mixed. Use only BUS or the BUS
terminal (addr. 9-10).
• 1, 2: On/Off (zero potential, max. 24 V)
• 3: Earth
• 4: 0-10 V signal
Connecting terminal EV / I3 to conventional heat source (only for
control units that are not supported, see Chapter 2.1, page 31)
• 1: Earth
• 2: PWM/0-10 V output
• 3: PWM Input
Only necessary with coding switch setting 9 and 10.
Necessary with coding switch setting 10.
May be required for the better detection of the operation of the
alternative heat source if the flow temperature sensor TA1 cannot be
placed directly in the alternative heat source.
Special conditions
15, 16: NO contact zero potential, max. 230 V AC/10 W
• 1: Earth
• 2: PWM/0-10 V output
• 3: PWM Input
When connecting a mixing valve: system flow temperature sensor
TB4 must be installed so that the set flow temperature is controlled
via the mixing valve.
When connecting a 3-way valve: terminal 44 is without function up to
version NF03.02 (before 11/2021) System flow temperature
sensor TB4 is optional.
• 43: buffer cylinder position (valve position to/100 %;
normally closed)
• 44: bypass position (valve position closed/0 %; normally open)
• 43: AWE setting (mixing valve pos. return increase 100 %)
• 44: Bypass position (valve control past AWE; mixing valve pos.
return increase 0 %)
14:
• Bypass position: valve position open/100 %; currentless
• Alternative heat source position: valve position closed/0 %;
through return spring
ME 200 – 6721841615 (2021/11)