DE2247776C2 - Circuit arrangement for signaling deviations in a DC voltage to be monitored - Google Patents

Description

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^^ ₅ o Sr -reaches

wendef'Äei ^ orr? ' ^Eri " ⁿ . ^{Erun ßschaIte} ·· ver Dem Operatiomv., Barker 6 is a through the

rS ^^ "" Stonmg for the purpose of switch formed switching device before

^thereby ^ ^{ge switched} · ^The switch5 contains ™ * jointly befätib Uhlkk I dd

, n. . ^^ s formed switching device upstream

Samif, ^g L ^We κ ""? , ^while ^ ^ge ' ^switched · ^{Switch5 contains} ™ * jointly be- Ύι ^{? e and} S ^ n ^ faHs switchover contacts that can still be activated. Shuts down in the illustrated ^rein ™ ⁿ g ^se "nnchtungen. 55 Switch position is the inverting input TI

5 ·
Such an arrangement would invert the 65 amplifiers.

^ F ÄÄÄ

would. _{the input} »- « of the operational amplifier 6

If the reference voltage 1/2 is the same, the alarm is switched off. This positive voltage is taken from a voltage divider and applied to the non-inverting input "+" that causes an inverting input "+". Low-resistance connection of the operational amplifier is in the operating state the DC voltage U1 output with the supply voltage + UB. At the same time as or greater than the reference voltage UI, 5, the lamp 7 lights up again until the operational amplifier switches with low resistance and the switch 5 is set back to position 1. The gene ground potential through, and to the output of operational state is thus positively again hergedes operational amplifier connected alarm provides the routing system the alarm is on the lamp 7 is not lit drops the DC voltage U 1 decoupling diodes 10 and 11 as an alarm condition due to pilot failure or path loss counter m> message Az and via the capacitor 8 as an alarm about the reference voltage U 2 , with even a very impulse A Δ on a multiple wiring to the Sigeringe voltage changes are sufficient, signal field 12 is carried out

the output of the operational amplifier is low resistance. There are two input amplifiers of the

connected to the supply voltage + UB , and the coupling matrix with the associated pilot evaluation

the alarm lamp 7 lights up. This switchover point is 15 times in a module and may be one in operation

Depending on the type of operational amplifier, the widely located connection cannot be interrupted under any circumstances

Areas can be freely selected and the size of the switch will be accessible from the outside

Reference voltage U 2 attached to the non-inverting input.

gear »+ '«. In this way, if a temporary pilot failure occurs, a comparison of the signals to be monitored is acknowledged in signal field 12, but if there is a voltage with a reference voltage, a line to the input gel drop below a certain value is reported for operational reasons amplifier is switched off, the alarm is switched off with the exchange of the two voltages U 1 and switch 5 in the module concerned / 2 with the help of the two changeover switches, so instead of the tet. This measure prevents the drop in the direct voltage t / l and the rise 25 from continuously giving an alarm to the signal field, which signals the direct voltage U 1. The function, that is, the signal field 12 is not unnecessarily permanent, of the operational amplifier 6 is thus reversed. proven. However, an alarm is given again if the alarm is switched off in the event of a pilut failure and this input is switched on again. At the same time, the pilot is alerted again to ensure that the operating state is restored and that this is possible without additional effort.

borrowed. In this case, the DC voltage U 1. With the aid of the circuit arrangement, the

equal to or greater than the reference voltage U 2, effort for signaling and reminder

However, the switch is in position 2, in which the circuit can be reduced considerably.

1 sheet of drawings

Claims (1)

Ί> The object of the invention is to provide a circuit Claim: Order for signaling deviations in a DC voltage to be monitored from an even To create a circuit arrangement for signaling reference deviations, if formed by a DC voltage, of a DC voltage to be monitored, which makes it possible to simply voltage a reference voltage also formed by a DC voltage with the help of signaling in the event of failure the DC voltage of an operational amplifier, whose two inputs and one renewed signaling when the gangs return to enable the DC voltage to be monitored DC voltage, and the reference voltage can be supplied and at io Task designed in such a way, characterized in that the voltage to be monitored and the reference voltage (U 1) and the reference voltage by means of a switch consisting of two switches (i / 2) by means of a switch consisting of two switches due to the interchangeable switching device (5) interchangeable with the inputs of the operational amplifier which are interchangeably led to the inputs (-, +) of the. These measures result in operational amplifiers (6). advantageously a signaling circuit with whose help the task at hand is solved with particularly little effort. ao The invention is based on the illustrated in the figure Embodiment explained in more detail. The circuit arrangement shown in the figure for η cr α u signaling is used to evaluate a pilot or ^'E fcn'ndung relates to a circuit arrangement for pilot monitoring in a Koppelfeldsystera for signaling deviations of a to exceed a ₅ waciicnden From the not shown in detail in FIG Kop ^ DC voltage shown the calibration voltage of a likewise pelfeld is one of the input amplifier 1 through a G The reference span formed is a carrier-frequency message band or sound pronouncement with the aid of an operational amplifier, the gram of which is amplified by the DC voltage to be monitored from a pilot frequency at both inputs. voltage and the reference voltage can be supplied and 30 In the coupling system is in the input amplifier the output of which is the signaling. core requires a pilot evaluation circuit that has a der ÜsA ^e pÄ «S ^a f ^tU ^ f ^^ ^nU u ⁸ , '^ ^Z ' ^B " ^{aUS internal alarming} g »nd memories being possessed by ίί L ³⁶⁴ I ⁵⁴ S ^^ here ^{7en and also with} a signal field together-S a ? monitored voltage should work. If for operational reasons a dfese ΓΐΤ '"' I ⁸ * ^S P ^ann V ⁿ .8 is derived and 35 line to the input amplifier '! switched off, so that together with a comparison voltage, an alarm should not be constantly sent to the signal field "eeefeit ^ai F ^? n ⁿ #T ** "'° Pf. ^r .? ^tioi l ^s amplifiers are added. However, if this input amplifier 1 SSinsS ^ Ä T ⁿ H ^{ng f} ^. ^daz "' ^that ß "er Ope- wired again, so by renewed alarm wacht e ^ siS'i ^e -ht ^medng t ?? f ^{nUng via} "« ^ it should be established that the pilot evaluation wacht, emits a signal, whereas be _t undervoltage is put into operation. ^nr ? ü ^{atlOnSVtärkerein SignaI Uefert} ' ^{der Via a} broadband isolating amplifier, the AC voltage or pilot chip to be monitored!