ICS TRIPLEX T9110 Product introduction

ICS TRIPLEX T9110 Product introduction

If all of the 8 channels of the group are used as inputs, and if in addition the UP5 terminal is left unconnected, no restrictions exist for the inputs. The input signal voltages then may be within -30 V and +30 V. There is no restriction for the input/output group concerning its safety against reversed polarity Features of the analog inputs: – The 8 analog inputs are not electrically isolated. – Resolution in the PLC system: The measured values are converted with a resolution of 12 bits, i.e. 11 bits plus sign for voltage and 12 bits without sign for currents. The ranges 0...5 V and ±5 V are converted with 10 bits plus sign. – Analog signals are conducted in shielded cables (see Fig. 2.2-5). – The analog inputs can be used individually in a lot of different operating modes (even as digital inputs). The operationg modes are configurable. – In order to make sure, that unused input channels have a defined 0V level, they may be shorted to AGND. In the following, some application examples are shown for analog sensors.

Measuring range 4...20 mA (passive-type 2-pole sensors)

 Input currents which exceed the measuring range cause an overflow error message. If the measured value is below the range, an underflow error message is generated. The input impedance is ca. 330 Ω. The current input has a self-protecting mechanism. If the input current gets too high, the shunt is switched off and the value for range overflow is generated. About every second, the unit tries to switch on the shunt again. In this way the correct measurement will succeed after the current has reached a normal value again. The trigger of the self-protecting mechanism is displayed by the red LED Ovl. as long as the overload is present. In the PLC system an error message is then stored (FK4, error number 4).

The open-circuit monitoring begins below ca. 3 mA. 

The value of the range underflow is stored. If the open-circuit monitoring is configured, the open-circuit event is displayed by the red LED Ovl. as long as it is present. In the PLC system an error message is stored (FK4, error number 9). The following figure shows the connection of 2-pole passive-type analog sensors 4...20 mA.If the analog current sensors 4...20 mA are powered from a separate power supply unit, the reference potentials 0V (of the separate power supply unit and the power supply unit for the 07 KT 98) must be interconnected to each other. In the above example, the AGND terminal remains unused.