2010 Construction and Material Specifications - Ohio Department of ...
2010 Construction and Material Specifications - Ohio Department of ... 2010 Construction and Material Specifications - Ohio Department of ...
733.03 REMAINS LATCHED, even through a power fail/recovery, until a RESET is issued by the front panel reset switch, or by the external test reset line. (b) Display the status of the Green, Yellow, and Red inputs of all channels, at the time the fault was latched. Ensure that a power loss does not affect the retention of this data. An acceptable alternative is to save status of all channels in memory and only display the latched fault. (7) Insertion/Removal of Unit. Ensure that it is possible to insert and remove the Monitor while the cabinet is energized without placing the cabinet into Flash operation provided that: The cabinet door remains open and the reset switch is held depressed while the unit is being inserted or removed. Any momentary disruption of field signal indications is less than 500 ms. (8) Microprocessor Use. If a microprocessor is used in the Monitor design, ensure that its program is written so that: (a) Integrity tests are performed periodically on each memory cell of each memory device, relevant to each device type. (b) Hardware external to the microprocessor circuits is employed to constantly sense proper microprocessor operation. (c) The Monitor reverts to a FAILED state if a fault is detected with the microprocessor or during integrity tests. (9) Front Panel Indicators. Ensure that the Monitor has red/yellow/green indicators for channel inputs and indicators to provide status and failure detection information. Furnish a GREEN AC POWER indicator. Ensure that all indicators are clearly readable in direct sunlight. Arrange and label the indicators as shown below: (a) AC POWER. Illuminates when the incoming AC Line Voltage exceeds 103 ± 2V ac, and FLASHES during FAULT RELAY OPERATION. (b) VDC FAIL. Illuminates when the Monitor has detected a 24VDC failure. condition is detected. (c) CONFLICT. Illuminates when a conflicting signal (d) WDT ERROR. Illuminates when a Watchdog error is detected. Do not provide a switch or similar device to disable WDT monitoring. (e) PC AJAR. Illuminates when the Conflict Program Card is removed or is not properly seated in its connector. Monitor failure. (f) MON FAIL. Illuminates to indicate an internal (g) RED FAIL. Illuminates when the Monitor detects that there is no active output on any of the field outputs that comprise a monitored channel. Ensure that the failed channels are displayed on the corresponding channel indicators. If for any reason red fail is not enabled, ensure that the red fail indicator light flashes at approximately 2hertz. 834
733.03 (h) MULT IND. Illuminates when the Monitor detects simultaneous outputs on more than one of the field outputs that comprise a monitored channel (green/yellow/red). Ensure that the failed channels are displayed on the corresponding channel indicators. (i) YELLOW. Illuminates when the Monitor detects the absence of a minimum period of active yellow field output during a green to red sequence. Ensure that the failed channel is displayed on the corresponding channel indicator. (j) 1, 2, 3, 48. Furnish channel indicators that illuminate a FAILED state in conformance with 733.03.C.6.c.(6). (10) Monitor Board Edge Connector. Furnish monitor board edge connectors that conform to CalTrans specifications. (11) Monitoring of Conflicting Voltages. Ensure that inputs to any channel that exceed the specified conflict threshold (see Section 6) are sensed as “ON” and illuminate their respective channel indicators. Ensure that the number of active channels in no way affects the conflict threshold. Ensure that the following voltage levels and times apply: A conflict has occurred and will cause a FAILED state only when voltages appear at the field output terminals. > 20 ± 5.0 V rms for a duration > 350 ± 150 ms. (12) Conflict Program Card. Furnish conflict program cards that comply with CalTrans specifications. d. Fault Relay Operation. (1) Line Drop Out. Furnish a Monitor that determines that a LINE DROP OUT has occurred when: The AC Line Voltage is: < 98 ± 2 VAC for > 400 ± 100 ms. Within this time frame, ensure that the Monitor suspends all fault monitoring functions, closes the output relay contacts, enables Stop Time output, and the AC POWER indicator on the front panel flashes at a rate of 2 hertz ±20 percent to indicate LINE DROP OUT status. Ensure that the Monitor remains in the FAULT RELAY mode until a LINE RECOVERY has occurred. (2) Line Recovery. Ensure that the Monitor that determines that a LINE RECOVERY has occurred when: The AC Line Voltage is: > 103 ± 2 VAC for > 400 ± 100 ms. (3) Fault Relay Recovery. When LINE RECOVERY is established, initiate the FAULT RELAY RECOVERY. For an interval of 6.0 ± 0.5 seconds, the following will take place: (a) The Output Relay contacts remain closed, and the Stop Time output remains active. 835
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733.03<br />
(h) MULT IND. Illuminates when the Monitor detects<br />
simultaneous outputs on more than one <strong>of</strong> the field outputs that comprise a<br />
monitored channel (green/yellow/red). Ensure that the failed channels are<br />
displayed on the corresponding channel indicators.<br />
(i) YELLOW. Illuminates when the Monitor detects the<br />
absence <strong>of</strong> a minimum period <strong>of</strong> active yellow field output during a green to red<br />
sequence. Ensure that the failed channel is displayed on the corresponding<br />
channel indicator.<br />
(j) 1, 2, 3, 48. Furnish channel indicators that illuminate<br />
a FAILED state in conformance with 733.03.C.6.c.(6).<br />
(10) Monitor Board Edge Connector. Furnish monitor board<br />
edge connectors that conform to CalTrans specifications.<br />
(11) Monitoring <strong>of</strong> Conflicting Voltages. Ensure that inputs to<br />
any channel that exceed the specified conflict threshold (see Section 6) are sensed<br />
as “ON” <strong>and</strong> illuminate their respective channel indicators. Ensure that the<br />
number <strong>of</strong> active channels in no way affects the conflict threshold.<br />
Ensure that the following voltage levels <strong>and</strong> times apply: A<br />
conflict has occurred <strong>and</strong> will cause a FAILED state only when voltages appear at<br />
the field output terminals.<br />
> 20 ± 5.0 V rms for a duration > 350 ± 150 ms.<br />
(12) Conflict Program Card. Furnish conflict program cards<br />
that comply with CalTrans specifications.<br />
d. Fault Relay Operation.<br />
(1) Line Drop Out. Furnish a Monitor that determines that a<br />
LINE DROP OUT has occurred when:<br />
The AC Line Voltage is:<br />
< 98 ± 2 VAC for > 400 ± 100 ms.<br />
Within this time frame, ensure that the Monitor suspends all<br />
fault monitoring functions, closes the output relay contacts, enables Stop Time<br />
output, <strong>and</strong> the AC POWER indicator on the front panel flashes at a rate <strong>of</strong> 2 hertz<br />
±20 percent to indicate LINE DROP OUT status. Ensure that the Monitor remains<br />
in the FAULT RELAY mode until a LINE RECOVERY has occurred.<br />
(2) Line Recovery. Ensure that the Monitor that determines<br />
that a LINE RECOVERY has occurred when:<br />
The AC Line Voltage is:<br />
> 103 ± 2 VAC for > 400 ± 100 ms.<br />
(3) Fault Relay Recovery. When LINE RECOVERY is<br />
established, initiate the FAULT RELAY RECOVERY. For an interval <strong>of</strong> 6.0 ±<br />
0.5 seconds, the following will take place:<br />
(a) The Output Relay contacts remain closed, <strong>and</strong> the<br />
Stop Time output remains active.<br />
835
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