Bosch MC 400 - Connection Diagrams with System Schematics; Overview of the Terminal Assignment

16 | Mounting
MC 4006 720 819 669 (2016/05)
▶ Route cables through the grommets, connect them as shown in the
connection diagrams and secure them with the strain reliefs, which
are supplied as part of the scope of delivery (Æ fig. 12 to 19, starting
at page 87).
3.3.3 Connection diagrams with system schematics
The hydraulic diagrams are only schematic illustrations and provide a
non-binding notice of a possible hydraulic circuit. Install safety
equipment in accordance with applicable standards and local
regulations. For further information and options, refer to the technical
guides or tender specification.
3.3.4 Overview of the terminal assignment
This overview indicates which system parts can be connected for all
terminals in the module. The components identified with * (such as HS1
and M1) in the system are possible alternatives. Depending on the
module's use, one of the components is connected to the “BUS1”
terminal.
More complex systems can be created in combination with additional
cascade modules. Terminal assignments, which deviate from the
terminal overview, are therefore possible.
Key to the fig. above and to fig. 24 to 26 (no terminal designation):
230 V AC Mains voltage connection
A0 230 V remote fault indicator provided by the customer
BUS EMS 2 / EMS plus BUS system (do not connect to BUS1 ...
BUS4)
BUS1...4 EMS / EMS plus BUS system or EMS 2 / 2-wire BUS
(connect directly to HS1 ... HS4 or M1 ... M4)
CON User interface with EMS 2 / EMS plus BUS system
(Controller)
GLT Building management system with 0-10 V interfaces
(Building Management System)
HS1, HS5, HS9, HS13
Heat source 1 (HS1 to BUS1), 2 (HS5 to BUS2), 3 (HS9 to
BUS3) and 4 (HS13 to BUS4) to single MC 400 / (Heat
Source)
HS1...4 Heat source 1 (to BUS1) ... 4 (to BUS4) to first subordinate
MC 400 (M1) / (Heat Source)
HS5...8 Heat source 1 (to BUS1) ... 4 (to BUS4) to second
subordinate MC 400 (M2) / (Heat Source)
I2 Switch for maximum performance (all devices are switched
to maximum performance when closed; Input)
I3 Stop switch (heat requirement for all devices is interrupted
when open; Input)
IA1 Input on/off controller 230 V (code 6 ... 9)
M1...4 Subordinate cascade module 1 (to BUS1) ... 4 (to BUS4)
MC 400 Cascade module
MM 100 Heating circuit module (EMS 2 / EMS plus)
PC0 Cascade pump (On/off or optional speed control via 0-10 V
signal with connection OC1; Cascade Pump); only with heat
sources without a pump
PC1 Heating pump (Pump Circuit); only for one heating circuit
without mixer and without MM 100 (feed pump or heating
pump)
PO Input and feedback for performance control via a 0-10 V
signal (Power in-/Output); Terminal assignment: 1 – 2 input;
1 – 3 output)
T0 Flow temperature sensor (Temperature sensor)
T1 Outdoor temperature sensor (Temperature sensor)
T2 Return temperature sensor (only required when PC0 with
speed control via 0-10 V signal is at connection OC1;
otherwise optional; Temperature sensor)
1) Only required, if no stop switch is connected to terminal I3.
If no stop switch (N/C contact) is connected to terminal I3:
▶ Connect the jumper, which is included in the scope of
delivery, to terminal I3.
6 720 809 449-16.4O
HS1*
M1*
HS5*
M2*
HS9*
M3*
HS13*
M4*
CONT2IA1A0
PC0
123
PO
(-) (+) (+)
123
0-10V
M
PC1
NL
T1 T0
M
PC0
NL
I2 I3230 V AC230 V AC
CNO NC
A0
120/230 V AC
NL N LINN63L
120/230VAC 120/230VAC
PC1 IA1
123
0-10V
1212
T1
T2 BUS1
MC400
120/230 V AC
≤ 24V
0
1
2
3
4
5
6
7
8
9
10
10
1)
12 12
BUS
12
BUS2
123
OC1
BUS3 BUS4
12 1212 1212
T0 I2 I3
≤ 24V
N63
PC0
1)