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Installation, connection and commissioning
To program the device and carry out additional applications, you can also connect in addition to
the components stated in this section the serial and optical interfaces of the EK205-M (see
section Construction and function).
6.2.1 Connecting gas meters
To measure the gas volume, a gas meter with a low-frequency pulse transducer can be
connected to the digital input DE1 of the EK205-M.
1
Fig. 9
The line diameter for connection of the inputs of the EK205-M is
0.8 ... 1.0 mm (AWG 20 – 18).
6.2.1.1 Connection to a low-frequency pulse transducer
1. Connect the pulse output of the gas meter to the DE1 terminal ( 1 in Fig. 9) of the EK205-M.
The priority can be freely selected. (The labels + and - of the terminals are intended for
connecting other pulse transducers.)
2. Set the operation parameters such as the cp value (pulse constant) as described in section
6.3.1.2.
6.2.2 Lead-sealing of the input terminals
After connecting to the gas meter in accordance with section 6.2.1, the input terminal DE1 needs
to be sealed.
To this end, the accessory bag terminal covers are provided. Where required, screw them via the
connected terminals and then glue an adhesive seal to the fastening screw (see section 6.3.2).
The pulse transducer of the gas meter is connected to the
DE1 ( 1 ) terminal of the EK205-M.
Details and characteristics on the use of the pulse
transducer are described in the following subsections.
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