Transcript
Ansaldo STS USA
Wayside Signaling Systems
RSE-1D2.10 Rev. 1-16
MicroLok® II Power Supply and Conditional Power Supply (CPS) PCBs ASTS USA supplies a variety of power supply PCBs to meet the requirements of different MicroLok II applications. Versions are available with a combination of internal (5V, 12V) and/or CPS circuits. All of these boards have provided safe and dependable service in mass transit and railroad applications for over a decade. Descriptions Power Supply and Power Supply/CPS PCBs (N16601203, N16661203, P30B.0100046, P20B.0100038) Power Supply PCBs provide basic internal MicroLok II system operating power. Several versions of these boards also serve a vital role in the fail-safe design of the system. All versions of these boards produce regulated ±12V and +5V cardfile power from system battery. The “N166” boards are designed for an input voltage range of 9.8 to 16.2 Vdc, while the “P20B” and “P30B” boards are designed for an input voltage range of 9.8 to 32.0 Vdc. MicroLok II cardfile power is distributed to the other system printed circuit boards (through the motherboard) to the cardfile PCB's 96-pin PCB bottom rear connector. The +12V output of the Power Supply PCB is not used as a source for any vital or non-vital outputs. (External battery power is used for this purpose). Current draw on the battery is determined by the application configuration, (number of signal lamps, cab signal carrier frequency, etc.) and can be computed by using the power calculation feature of the MicroLok II Development System. The N16661203 version of this board also contains a Conditional Power Supply (CPS) circuit. This particular board generates the VCOR voltage (–9 Vdc to –14Vdc) from a 250Hz CPU check signal, to energize the VCOR relay. The 250Hz check signal is delivered to the Power Supply PCB as long as diagnostic checks performed continuously by the CPU detect no internal or external system faults. The CPS creates the VCOR voltage in response to the 250Hz signal. Failure of a diagnostic check by the CPU results in the removal of this check signal from the power supply PCB and the corresponding loss of VCOR power. Once the VCOR drops all output power is removed from the cardfile vital outputs. Several versions of these boards are equipped with a standard front panel. In these boards, the front panel LEDs on this board indicate when the 5V internal power is turned on, and when the “conditional” power output to the VCOR is turned on. The remaining versions of these boards have no front panel and are designed to be mounted behind a blank panel or one of the MicroLok II built-in Local Control Panels (LCPs). Refer to the ordering tabulations for the specific board configurations. Note: ASTS USA’s PN-150B relay (see RSE-4E1) is used for low output current VCOR applications, while the PN-150HD relay (see RSE-4E2) is used for high output current VCOR applications.
To order, call 1-800-652-7276
Conditional Power Supply (CPS) PCB (N451910-7501) The CPS PCB is used in MicroLok II installations where internal operating power is supplied from a separate PCB or source. As such, this board is equipped with the same CPS circuit required to enable the pick-up voltage for the VCOR. Point-to-point wiring between the upper and lower motherboards transfers the required voltage (+5V, +12V, -12V and ground) to the upper motherboard PCB slot connector to provide these board’s required operating power. The board is equipped with its own front panel,
www.ansaldo-sts.com RSE-1D2.10, p. 1
MicroLok® II Power Supply and Conditional Power Supply (CPS) PCBs
Ansaldo STS USA RSE-1D2.10 Rev. 1-16 Advantages
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Internal 5V/12V circuits regulate/convert external battery power for all MicroLok II cardfile circuits. CPU-controlled CPS plays critical role in driving VCOR relay for vital outputs power. Boards available with or without front panels/LED indicators for use with/without built-in LCPs, blank panels, etc.
Specifications
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Refer to ordering tabulation for Power Supply/CPS board specifications.
Ordering and Additional Information
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Refer to tabulations for Power Supply and CPS board part numbers. When replacing a Power Supply PCB, make certain of the PCB type. An old model N16660301 PCB can be replaced with a new model N16661203 PCB or P20B.0100038 PCB, but not new with an old (due to current ratings). Note: A constant-voltage type charger is recommended for the batteries supplying power to the MicroLok II system. The batteries must be capable of providing a minimum voltage of 11.5 Vdc at system start-up. (The system will not turn on with a battery voltage of less than 11.5 Vdc.) Contact your ASTS USA Account Executive for Power Supply/CPS PCB applications as well as MicroLok II applications possibilities in general. When ordering a replacement MicroLok II Power Supply PCB, please note that a Power Supply-only PCB cannot be interchanged with a CPS-only PCB. Request ASTS USA Service Manuals SM-6800A and SM-6800B for additional information on the Power Supply and CPS boards.
Power Supply and Conditional Power Supply PCBs Isolated 5V 12V Order No. Type Output Internal Internal Input Range N16661203 P. Supply + CPS Yes +5V @ 5A +12V@1A 9.8-16.2 Vdc -12v@2A N16601203 P. Supply + CPS Yes +5V @ 5A +12V@1A 9.8-16.2 Vdc -12v@2A P20B.0100038 P. Supply + CPS Yes +5V @ 5A +12V@1A 9.8-32.0 Vdc -12v@2A P30B.0100046 P. Supply + CPS Yes +5V @ 5A +12V@1A 9.8-32.0 Vdc -12v@2A N451910-7501 CPS Only No ---Note (1): +5V power for cardfile internal +5V circuits. Note (2): +12V power for cardfile internal +12V and -12V circuits. Note (3): Mounted behind blank or LCP panel. Note (4): With Isolation power supply Note (5): Used when cardfile powered from external source. MicroLok® is a registered trademark of Ansaldo STS USA, Inc.
RSE-1D2.10, p. 2
Front Panel Yes
Notes (1)(2)(4)
No
(1)(2)(3)(4)
Yes
(1)(2)(4)
No
(1)(2)(3)(4)
Yes
(5)
