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Connecting The Power Supply - aqua metro CALEC MB Bedienungsanleitung

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2. Connecting the power supply

The unit can be operated either with a 230VAC power supply or with the
AMBUS
®
low voltage network, depending on the measuring concept. All
connections must be made according to the enclosed wiring diagramme.
Terminal numbers up to 50 correspond to the EN1434 heat meter
standard.
Mains connections must be made by trained and authorised
personnel only! Local safety regulations must be observed.
Connection to terminals other than L+N is extremely dangerous
and will permanently damage the equipment.
2.1
230 V mains connections
The mains supply must be adequately protected against unauthorised
interruption. The heat meter must be protected according to the latest
state of technology to ensure safe shutdown in case of electrical failure.
The safety fuse must be limited to max. 10A.
Connect the meter to a separate fuse or to the heating control
circuit.
The calculator is fully isolated and requires no grounding connections.
Connect mains power to the terminals marked L + N. All other terminals
are strictly reserved for low voltage (< 50V) and measuring signals only.
VD 3-168 DEF
Insert the mains cable (Ø 5...10mm) through the left hand (Pos.A) PG11
cable port and tighten firmly.
For practical reasons the power cables must not be looped. If no power
cable is introduced, fit the cover cap (included in the accessory pouch)
into the empty cable port.
L
N
230 V / 50 Hz
mains connection
2.2
Low voltage connections (15V) to the centralised M-Bus power
supply
This low voltage power supply is used for restricted operation if no mains
supply is available. When used in conjunction with an AMBUS
unit, this power supply together with the 2-wire M-Bus cable connected
to the CALEC
®
provides a reliable system for communications.
If no bus cable is introduced, cover the empty cable port with the cap
provided. In Germany, the device has been approved for operation with
230 V supply only.
30
Small voltage
supply
or
25
61
24
60
e.x..4x0.8
15VAC Meter-
AMBUS .Bus
®
central
Aquametro AG

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