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Nefit EMS Manual

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Product details | 13
6 720 816 739 (2015/05)MC 400
2.2.5 Output control
This control strategy is used when the heating system is controlled using
a building management system with a 0-10 V controller output.
Fig. 1 Linear relationship between the 0-10 V signal (U in volts) and
required performance P (in percent with reference to the
maximum system performance)
The connected heat sources are turned on and off according to the
required performance as per the module code as is the case with a serial
standard or serial optimized cascade.
2.2.6 Flow temperature control
This control strategy is used when the heating system is controlled using
a building management system with a 0-10 V controller output.
Fig. 2 Linear relationship between the 0-10 V signal (U in volts) and
required flow temperature
(in percent with reference to the
maximum flow temperature)
The connected heat sources are turned on and off according to the
required flow temperature as per the module code as is the case with a
serial standard or serial optimized cascade.
2.3 Setting the coding card
Fig. 3 Coding card with module status display, and a status display of
the connected heat sources or modules
2.4 Scope of delivery
Fig. 4, page 82:
[1] Module
[2] Bag with strain relief
[3] Installation instructions
2.5 Specifications
The design and operation of this product comply with
European Directives and the supplementary national
requirements. Its conformity is demonstrated by the CE
marking . You can ask for a copy of the declaration of conformity for this
product. For this purpose see the contact address on the back cover of
these instructions.
6 720 809 449-21.1O
P / %
U / V
1
10
100
1,5 10
6 720 809 449-22.1O
/ %
U / V
1
min
max
1,5 10
Coding Module function
0 Off (delivered condition)
1 Serial standard cascade
2 Serial optimized cascade ( Fig. 23, page 85)
3 Serial cascade with peak load coverage
4 Parallel cascade
5 No function
6 External 0-10 V performance control with serial standard cascade
7 External 0-10 V performance control with serial optimized cascade
( Fig. 24, page 86)
8 External 0-10 V flow temperature control with serial standard
cascade
9 External 0-10 V flow temperature control with serial optimized
cascade
10 The module is one of a maximum of 4 subordinate cascade modules.
The higher level cascade modules control the connected heat source
corresponding to the code noted on them ( Fig. 25, page 86).
Table 2 Coding and function
Specifications
Dimensions (W×H×D) 246×184×61mm (further
dimensions Fig. 5, page 82)
Maximum conductor cross-section
• 230 V terminal
• Extra-low voltage terminal
•2.5mm
2
•1.5mm
2
Rated voltages
•BUS
• Module mains voltage
• User interface
• Pumps and mixers
•15VDC
(reverse-polarity-protected)
• 230 V AC, 50 Hz
•15VDC
(reverse-polarity-protected)
• 230 V AC, 50 Hz
Fuse 230 V, 5 AT
BUS interface EMS 2 /EMS plus
Power consumption on – standby <1W
Max. output 1100 W
Table 3
… 13 …


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