HIMA system EABT3 B9302 997009302 (frame) series DI digital input card

Description

EABT3 B9302 997009302 The analog inputs (AI) of the F3 AIO 8/4 01 can also be used to monitor the line for open

circuits and short-circuits of digital outputs of other HIMatrix controllers (line monitoring). To this

end, the transmitter supply must be set to 26 V. To do so, EABT3 B9302 997009302 set the Transmitter Voltage[01]

parameter in SILworX and ELOP II Factory to 2, see Table 29 and Table 33.

3.1.2.1

Requirements

EABT3 B9302 997009302 Using HIMatrix devices with analog inputs, the digital outputs of any HIMatrix controller can be

monitored under the following conditions:

The transmitter supply of analog inputs exists,

An external shunt can be connected to the analog inputs.

EABT3 B9302 997009302 systems.

3.1.2.2

Examples

EABT3 B9302 997009302 The digital outputs of the F2 DO 16 01 or F20 can be monitored with the analog inputs of the

F3 AIO 8/4 01.

The analog inputs of the F3 AIO 8/4 01 can monitor the digital outputs of the DIO 24/16 01

(modular system).

Figure 1 shows how the lines connecting a digital output (DO) to an actuator (e.g., solenoid

valve) can be monitored for open-circuits and short-circuits.

The supply voltage of the series resistor (transmitter voltage) fluctuates within a tolerance

range, see Specifications in Table 18. For this reason, EABT3 B9302 997009302 the voltage drops on the resistors can

change slightly. Within the fluctuation range, a measurable voltage drop is definitely still

detected on shunt Rshunt.

The series resistor was dimensioned such that when DO = FALSE, the voltage drop on the

solenoid valve is as low as possible (valve is slightly warmed up) and the voltage drop on the

shunt is still measurable.

The shunt Rshunt was measured with dependence on the solenoid valve resistance such that if

the output DO is activated (DO = TRUE), the voltage drop on the solenoid valve is higher than

the switching threshold of the solenoid valve, i.e., the coil of the solenoid valve is energized.

Additionally,EABT3 B9302 997009302 the shunt Rshunt is designed such that with any switching state of the output DO

(TRUE or FALSE), a measurable voltage drop results (values for AI > 10, see Table 7).

On the other hand, if field wiring breakage occurs within the red-colored area, voltage drops are

no longer present on the shunt.

An open-circuit within the red-colored area (see Figure 1) can be monitored through the voltage

drop on the shunt Rshunt , i.e., the input value of AI, see Table 7.

To allow open-circuit monitoring, the value of AI must be evaluated in the logic of the user

program.

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