Installation

Connecting or disconnecting the standard 15 pin SUB-D connectors of the TSX CTY 2A/ 4A/ 2C modules to/from the encoder and sensor supplies present is not recommended as this may damage the encoder. Some encoders cannot withstand sudden and simultaneous signal and supply power-ups or outages.

General wiring instructions

Wire sections

Use wires of a satisfactory section to avoid drops in voltage (mainly with 5 V) and overheating.

Example of falls in voltage for encoders supplied with 5 V with a cable length of 100 meters:

Section of the wire

Encoder consumption

50 mA

100 mA

150 mA

200 mA

0.08 mm2 (gauge 28)

1.1 V

2.2 V

3.3 V

4.4 V

0.12 mm2 (gauge 26)

-

1.4 V

-

-

0.22 mm2 (gauge 24)

-

0.8 V

-

-

0.34 mm2 (gauge 22)

0.25 V

0.5 V

0.75 V

1 V

0.5 mm2

0.17 V

0.34 V

0.51 V

0.68 V

1 mm2

0.09 V

0.17 V

0.24 V

0.34 V

Connection cable

All cables carrying the sensor supply (encoders, proximity sensor etc.) and the counting signals must:

  • be at a distance from high voltage cables,

  • be shielded with the shielding, which is linked to the protective ground connection on both the PLC and encoder side,

  • never carry signals other than counting signals and supplies relating to counting sensors.

The connection cable between the module and encoder should be as short as possible to avoid creating loops, as the circuit capacities can interfere with operation.

NOTE: If necessary, direct the flow of the signal in the same cable as the supplies. Cables with twisted pairs should preferably be used for this.

Encoder and auxiliary sensor supply

Encoder supply

This must:

  • be reserved exclusively for supplying the encoder to avoid parasitic pulses which could interfere with the encoders, whose electronics are sensitive,

  • be placed as close to the TELEFAST 2 base as possible to reduce drops in voltage and coupling with other cables,

  • be protected against short circuits and overloads by fast blow fuses,

  • work well independently to avoid micro-power outages.

Auxiliary sensor supply

Refer to the general regulations for implementing discrete modules.

NOTE: The – 0 VDC polarity of the auxiliary encoder and sensor supplies should be grounded as near to the supplies as possible.

The shielding of the cables carrying the voltages should be grounded.

Software implementation

Software implementation and the language objects assigned to the different counting functions are described in the "counting application" manual.