Tecfluid APTM44 - Manual (Page 3)

Cod.:E-MI-2152004I / Rev.: 1
3
The connection is by means of screw terminal blocks.
The APTM44 should be installed as close as possible to the turbine in order to reduce to a
minimum the length of the pick-up cable.
IMPORTANT : In order to comply with the electrical safety requirements as per IEC 1010-1, the
installation of the equipment must take into account the following:
-The equipment must be installed inside an electrical mounting cabinet to avoid the possibility
that the operator may touch a connection terminal.
-A mains switch must be provided to disconnect the equipment. This switch must be marked as
the disconnecting device for the equipment and be within easy reach of the operator.
4.1 Power Supply Connection
The power supply should be connected to terminals Nº 2 and 3.
4.3 Pick-up Input Connection
These cables should not pass close to AC mains cables, given that these can produce
interferences in the input and induce errors.
The input should be connected as follows:
APTM44 Terminal Nº Turbine Terminal Nº
4 Shield 1 Shield
5 live 2 live
6 live 3 live
The "live" cables are the ends of the pick-up coil.
4.5 Pulse Output Connection
There are two ways of connecting the pulse output, depending on the type of input available:
4.6.1 Output for a Pick-up Input
This output produces two TTL level outputs which are opposed in phase.
APTM44 Terminal Nº MC-01 (TM-44) Terminal Nº
7 Shield 1 Shield
8 live 2 or 3 live
9 live 3 or 2 live
4.6.3 Output for TTL Input
APTM44 Terminal Nº MT-02 (TTL) Terminal Nº
7 Shield 1 Shield
8 live 2 live