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計測機器 CALEFFI 750714のPDF マニュアルをオンラインで閲覧またはダウンロードできます。CALEFFI 750714 16 ページ。 Direct heat meter

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• Heating/cooling flow meter

11 - 12 Flow meter pulse input.

11 (blue wire)

12 (white wire)

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blue wire

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• Electric supply

blue wire

15 - 16 Centralised 24 V (ac) electric supply line

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The 24 V (ac) electric supply line must only be used for heat

meters and must not be under the user's control.

blue wire

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• Data centralisation

If centralised data transmission via BUS is used, the following

connection plan must be implemented:

17 - 18 RS-485 polarised transmission Bus

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17 Tx (RS-485-B)

18 Rx (RS-485-A)

For the transmission bus, use 2 x 1 mm

twisted type. Note: Transmission polarisation must be fully

observed

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• Enery pulse outputs - codes 755881/755882

2 - 3

Remote heating units totaliser output (kWh) (OC type)

1 - 2

Remote cooling units totaliser output (kWh) (OC type)

These outputs can be connected to our product code 755890

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(remote energy totaliser) or a general supervisor.

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Output specifications:

1 IMP = 1 kWh - open collector contact

Pulse duration: 120 ms

24 V (dc) - 50 mA

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Maximum frequency = 1 Hz

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white wire

cable, preferably of the

• Additional pulse inputs 755825

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E.g.: Heating water - Electrical energy - Gas

NOTE: The additional inputs are only enabled with codes 755825.

Connection must be with a voltage-free contact and the weight and unit

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of measurement for the pulse must be indicated at the time of ordering.

E.g.:

1 pulse = 10 litres of heating water

1 pulse = 0,1 kWh electrical energy

1 pulse = 1 Nm

gas

6 - 7

3rd pulse consumption

5 - 6

4th pulse consumption

Minimum pulse duration: 120 ms

Maximum frequency = 1 Hz

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• Digital input

The digital input must be with a voltage-free contact (class IB)

13 - 14 Connection to the auxiliary microswitch for the zone valve.

Note

- Each 7504 series appliance comes with a tamper-proof lead

sealing kit for the temperature probes and the plastic electronics

box.

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Operating information

Accumulated energy is stored in a non-volatile memory device

(EEPROM) each time the unit of measurement is competed (1 kWh);

at the same time this increase results in updating of the display (see

"User information cycle").