Doc. code 1080100090
Version: 2015_03_03
11
General information about pulse inputs
It is important to note that the acknowledged state of the art technology rules and the relevant legal restraints
(international and local; see par. 9.5.1 “Relevant norms, standards and literature on the pulse inputs”) are to be
observed.
The installation has to be performed by authorized, skilled persons. If the regulations and the information in the
installation and operating instruction manuals are not strictly followed, or if the installation is shown to be faulty,
any resulting expenses will be charged to the company responsible for the installation.
9.5.1
Relevant norms, standards and literature on the pulse inputs
IEC 60364-4-41 (2005-12)
Low-voltage electrical installations - Part 4-41: Protection for safety -
Protection against electric shock
IEC 60364-4-44 (2007-08)
Low-voltage electrical installations - Part 4-44: Protection for safety -
Protection against voltage disturbances and electromagnetic
disturbances
IEC 60364-5-51 (2005-04)
Electrical installations of buildings - Part 5-51: Selection and erection of
electrical equipment - Common rules
IEC 60364-5-54 (2011-03)
Low-voltage electrical installations - Part 5-54: Selection and erection of
electrical equipment - Earthing arrangements and protective conductors
EN 50310 (2010)
Application of equipotential bonding and earthing in buildings with
information technology equipment
EN 1434-2 2007
Heat Meters — Part 2: Constructional requirements
9.5.2
Technical data pulse inputs
Pulse input class
CMOS; IB according to EN 1434-2:2007
Internal pull-up voltage
+ 3 V DC
Internal pull-up resistance
2 MΩ
Current
= 1.5 µA
High-level threshold
U ≥ 2 V
Low-level threshold
U ≤ 0.5 V
Length of connecting cable
1 m
9.5.3
Electrical requirements on the pulse output of the instrument to be connected (e.g. flow meter)
Pulse output class
(passive) output OA (reed contact / electronic switch) or
OC (open collector) according to EN 1434-2:2007
Pulse length "on"
≥ 100 ms
Pulse length "off"
≥ 100 ms
Current
= 1.5 µA
Resistance "contact open"
≥ 6 MΩ
Resistance "contact closed"
≤ 3 kΩ
9.5.4
Setting up the two additional pulse inputs
The optional pulse inputs 1 + 2 for external meters can be set up using the ‘Device Monitor’ configuration
software.
The input pulse value, the units and the starting values of the external meters can be configured.
9.5.5
Set-up possibilities
Pulse value
Units
1
litres / kWh / pulse without unit
2,5
litres / kWh / pulse without unit
10
litres / kWh / pulse without unit
25
litres / kWh / pulse without unit
100
litres / kWh / pulse without unit
250
litres / kWh / pulse without unit
