ATE67621T1 - CIRCUIT ARRANGEMENT FOR AUTOMATIC FUNCTIONAL TESTING OF A MONITORING DEVICE. - Google Patents

CIRCUIT ARRANGEMENT FOR AUTOMATIC FUNCTIONAL TESTING OF A MONITORING DEVICE.

Info

Publication number
ATE67621T1
ATE67621T1 AT88106147T AT88106147T ATE67621T1 AT E67621 T1 ATE67621 T1 AT E67621T1 AT 88106147 T AT88106147 T AT 88106147T AT 88106147 T AT88106147 T AT 88106147T AT E67621 T1 ATE67621 T1 AT E67621T1
Authority
AT
Austria
Prior art keywords
alarm
circuit
capacitor
pump
pump circuit
Prior art date
Application number
AT88106147T
Other languages
German (de)
Inventor
Peter Wenter
Original Assignee
Siemens Ag
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens Ag filed Critical Siemens Ag
Application granted granted Critical
Publication of ATE67621T1 publication Critical patent/ATE67621T1/en

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/097—Supervising of traffic control systems, e.g. by giving an alarm if two crossing streets have green light simultaneously

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Alarm Systems (AREA)
  • Testing Electric Properties And Detecting Electric Faults (AREA)
  • Tests Of Electronic Circuits (AREA)
  • Fire Alarms (AREA)

Abstract

The arrangement is for optical signal systems with a test system (PRS) which simulates faults by appropriately influencing (BE) the monitoring unit (UWE). An alarm (ALA) thereby triggered is suppressed during the period of the test. The circuit arrangement consists of a fail-safe exclusive OR circuit (EXOR) which has a locking (Kl) alarm relay (K) and two pump circuits (A and B) each with an associated capacitor (C3, C4), and an RC element (RI, Cl and R14, C2) fitted in the input circuit and switching transistors (Tl to T6). The pump circuits (A, B) generate the excitation voltage for the alarm relay (K). The first pump circuit (A) receives the alarm signal (ALA) and the second pump circuit (B) receives the alarm suppression signal (ALU). In each case, one pump circuit (A or B) charges its capacitor (C3 or C4) whilst the other pump circuit (B or A) discharges its capacitor (C4 or C3) via the alarm relay (K), the alarm relay (K) dropping out when the negative capacitor voltage goes below the drop-out voltage. <IMAGE>
AT88106147T 1987-04-21 1988-04-18 CIRCUIT ARRANGEMENT FOR AUTOMATIC FUNCTIONAL TESTING OF A MONITORING DEVICE. ATE67621T1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3713392 1987-04-21
EP88106147A EP0287991B1 (en) 1987-04-21 1988-04-18 Circuit arrangement for the automatic function-checking of a monitoring device

Publications (1)

Publication Number Publication Date
ATE67621T1 true ATE67621T1 (en) 1991-10-15

Family

ID=6326014

Family Applications (1)

Application Number Title Priority Date Filing Date
AT88106147T ATE67621T1 (en) 1987-04-21 1988-04-18 CIRCUIT ARRANGEMENT FOR AUTOMATIC FUNCTIONAL TESTING OF A MONITORING DEVICE.

Country Status (3)

Country Link
EP (1) EP0287991B1 (en)
AT (1) ATE67621T1 (en)
DE (1) DE3864884D1 (en)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3978476A (en) * 1973-12-17 1976-08-31 Hochiki Corporation Circuit conduction test arrangement for emergency alarm systems
DE2833761C3 (en) * 1978-08-01 1981-12-03 Siemens AG, 1000 Berlin und 8000 München Circuit arrangement for monitoring the status of signal systems, in particular road traffic light signal systems
GB2054923B (en) * 1979-06-30 1983-04-13 Mather & Platt Alarms Ltd Self-testing alarm systems
US4586041A (en) * 1983-12-29 1986-04-29 Carlson Donald A Portable conflict monitor testing apparatus
EP0214692B1 (en) * 1985-09-05 1991-12-04 Koninklijke Philips Electronics N.V. Monitoring a conflict detector for traffic-lights

Also Published As

Publication number Publication date
EP0287991B1 (en) 1991-09-18
DE3864884D1 (en) 1991-10-24
EP0287991A1 (en) 1988-10-26

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Legal Events

Date Code Title Description
REN Ceased due to non-payment of the annual fee