Kamstrup MULTICAL 602, Technical Description, Page: 67 / 130

MULTICAL® 602
Kamstrup A/S ∙ Technical Description ∙ 5512 ‐ 931_N1_GB_11.2016 67
7 Flow sensor connection
MULTICAL

602 can be used with up to 4 pulse inputs, of which V1 and V2 are used for energy calculation and leak
surveillance, whereas VA and VB are used to accumulate pulses e.g. from tap-water meters and electricity meters.
V1 and V2 can either be used for fast pulses (CCC = 4XX, 2XX, 1XX) or for slow pulses (CCC = 0XX, 9XX). Fast and
slow pulses cannot be used simultaneously.
7.1 Volume inputs V1 and V2
MULTICAL

602 can be connected to one or two flow sensors depending on the required application. Typical heat
installations with one flow sensor are always connected to V1 irrespective if this flow sensor is installed in inlet
pipe or outlet pipe.
Almost all available flow sensor types with pulse output can be connected as the standard connection PCB receives
pulses from both electronic and mechanical meters. In addition, a connection PCB that receives 24 V active pulses
is also available.
7.1.1 Flow sensor with transistor- or FET output

Typically, the signaller is an optocoupler with a transistor or a FET outpt. V1 is connected to terminal 10(+) and 11(-
), V2 is connected to terminals 69(+) and 11(-). Terminal 9 is not used in this application.
The leak current in the transistor or FET output must not exceed 1

A in OFF state and there must be max. 0.4 V in
ON state.
A suitable CCC code must be selected with the same number of pulses/liter as the flow part, and for this flow
sensor type the CCC code must be 100

CCC

900.
Example: CCC=147 fits an electronic meter with 1 pulse/liter and qp of 150 m
3
/h.
7.1.2 Flow sensor with Reed switch output

The signaller is a Reed switch typically mounted on vane wheel or Woltmann meters, or a relay output from e.g. a
magnetic inductive flow sensor. V1 is connected to the terminals 10(+) and 11(-), V2 is connected to the terminals
69(+) and 11(-). Terminal 9 is not used in this application.
The leak current must not exceed 1

A in OFF state and there must be max. 10 k

in ON state.
A suitable CCC code must be selected with the same number of pulses/liter as the flow part, and for this flow sensor
type the CCC code must be in the range 010

CCC

022, or 910

CCC

922.
Example: CCC=012 fits a mechanical flow sensor with 100 liter/pulse. Flow sensors with Qmax. in the range
10…300 m
3
/h can use this CCC code.