Overview Of The Terminal Assignment - Bosch EMS-2 Notice D'installation

3.3.4

Overview of the terminal assignment

This overview indicates which system parts can be connected for all
terminals in the module. Depending on the system, one of the
components can be connected to the terminal (e.g. "VR2" or "PR2"
120/230VAC 120/230VAC
4
43 44
N N
N L N L
M M
M M
VR2* VR1 PR1 230 V AC
PR2*
Legend for fig. above and figs. 21 for 29 at the end this document
(terminal designation  Tab. 38 and 39):
grau Components with a grey background can be connected
as an option
* Components of the system are possible alternatives
230 V AC Mains voltage connection
AHS Alternative heat source with signal input; extra-low voltage
or mains voltage side; On/Off or 0-10 V signal for modulation
(Alternative Heat Source) (Alternative Heat Source)
AHSP Alternative heat source without signal input
(Alternative Heat Source Passive)
B Buffer cylinder (Buffer)
BC Wall-mounted indoor unit electronics (Basic Controller)
CC Combi cylinder (Combi Cylinder)
CHC Conventional heat source: condensing storage combi heating
centre (Combi Heating Centre)
CON Control unit with EMS 2 BUS system; signal input/output for
systems with conventional and alternative heat sources and
coding switch setting one (Controller)
CONM Control unit with EMS 2 BUS system; signal input/output for
systems with stand-alone alternative heat sources and coding
switch setting 10 (Controller Master)
DHW cylinder (Domestic Hot Water Cylinder)
DHWC
HS Conventional heat source (Heat Source)
Only establish HS to OEV connection with control units with
EMS 1 device electronics; the connection is not required with
EMS 2 device electronics
FS Freshwater station (Freshwater Station)
1) Terminal assignment on extra-low voltage side: 1, 2 – On/Off (max. 24 V); 3 –
earth; 4 – 0-10 V signal
ME 200 – 6720884576 (2019/08)
ME 200
120/230 V AC
VR2 VR1 PR1
N 14 N 43 44 N 14
120/230 V AC
VB1 OA3
N L N L N 43 44 15 16
4
43 44
N
M
230 V AC VB1 AHS/
AWE
to the terminal "VR2"). Depending on what the module is used for,
simultaneous connection of a number of components may be required,
or may need to be excluded.
4 5 6
3 7
2 8
1 9
10 10
0
24 V
TR1 TB1 TB2 TB3 TB4
1 2 1 2 1 2 1 2 1 2
24 V
OA1 OA2
T1 TR2 OEV
on/off 0-10 V Adr.9-10
1 2 1 2 1 2 1 2 3 4
N
T1 TR2 HS AHS/ CONM
AWE
(autark)
Heat source electronics (Master Controller)
MC
PR1 120/230 V AC: pump of alternative heat source
(Pump Return); ≤ 24 V: control signal
alternative heat sources (0-10 V/PWM) for output control
PR2 Connection of pump for heating circuit 1 with stand-alone
alternative heat sources
1)
MS Solar module (Solar Module)
T1 Outside temperature sensor, only required with coding
switch setting 10 (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)
TR1 Alternative heat source return temperature sensor
(Temperature Return)
TR2 Heating system return temperature sensor
VB1 Mixer connection
VR1 Mixer connection
(Valve Return)
VR2 Connection of diverter valve to bypass conventional heat
source
2) Terminal assignment: 1 - earth; 2 - pulse width modulation/0-10 V output; 3 -
pulse width modulation input
3) Note with diverter valve: terminal 43 acts in direction of buffer cylinder
1 2 3
PWM
TA1 TF1 OR1
TF1 PR1
1 2 3 4 1 2 3
BUS
BUS BUS
1 2 1 2 1 2
CON CON
TR1 TB1 TB2
BC/MC BC/MC
2)
3)
Buffer cylinder return (Valve Buffer)
3)
Alternative heat source return
Installation
PWM: 1-2
0-10 V: 1-3
0-10V
TB3 TB4 TA1
0010016173-003
with stand-alone
29