Kamstrup MULTICAL 403 Technical Description

MULTICAL® 403
Kamstrup A/S · Technical description · FILE100000166_B_EN-55121689_M1_07.2023
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3.2.6 Pulse inputs A and B >FF-GG<
MULTICAL® 403 has 2 extra pulse inputs (A and B) which are placed on the communication modules (see paragraph
11 for further details on modules). The pulse inputs are used for acquisition and remote accumulation of pulses from
e.g. mechanical water meters and electricity meters. The pulse inputs function independently of the meter itself.
Therefore, they are not included in any energy calculation. The constructions of the two pulse inputs are identical
and can be individually set up to receive pulses from water meters or electricity meters.
All modules with Pulse inputs are clearly marked with this.
Terminals for In- A and terminals for In-B are marked as well.
See chapter 11.2 for more details about the available modules.
MULTICAL

403 registers the accumulated consumption of the meters connected to inputs A and B and saves the
counter values every month and every year on target date. The number of these yearly and monthly loggings
depends on the selected logger profile (RR-code). Read more about data logger profiles in paragraph 3.2.10. In order
to make identification easier during data reading, the meter numbers of the two meters connected to inputs A and B
can be saved too. The meter numbers can be programmed into the meter in ”SETUP loop” or via METERTOOL HCW.
Two alarm types are connected to the pulse inputs, cold water leakage and external alarm respectively. Unless
otherwise informed by the customer, the meter is by default prepared for external alarm on both inputs from the
factory, but only with active leakage alarm on input A (like in MC402). Please contact Kamstrup A/S should you need
leakage alarm possibility on input B. Read more about cold water leakage in paragraph 3.2.8 and more about info
codes in paragraph 7.7.
Below the specifications of pulse duration and pulse frequency for meters connected to pulse inputs:
Pulse inputs A and B
Electronic switch
Reed contact
Pulse input
680 k
Ω
pull-up to 3,6 V 680 k
Ω
pull-up to 3,6 V
Pulse ON
<
0,4 V i
>
30 ms
<
0,4 V i
>
500 ms
Pulse OFF
>
2,5 V i
>
30 ms
>
2,5 V i
>
500 ms
Pulse frequency
<
3 Hz
<
1 Hz
Electrical isolation
No
No
Max. cable length
25 m
25 m
Requirements to ext. contact
Leak current at function open
<
1
µ
A

Kamstrup MULTICAL 403 Specifications

General

Type	Ultrasonic Heat Meter
Flow Sensor	Ultrasonic
Pressure Rating	PN16
Battery Life	Up to 16 years
Approval	MID Class 2
Display	LCD
Communication	M-Bus, Wireless M-Bus, Modbus, BACnet
Power Supply	Battery
Accuracy	Class 2
Protection Class	IP54
Housing Material	Composite
Flow Rate Range	0.6 m3/h to 15 m3/h