Q: Is the Monarch RDS-2 Power Supply available?
A: This is very special power supply is no longer available.
The Monarch RDS-2 which behaved is such a way as to apply 24VDC for 1 second then drop down to 5VDC for the remainder of hold time as was used to power the dicontinued Monarch 18 series devices that featured electric latch retraction.
The power supply would, if you attempted to use a newer PS873 or PS914 with the older ELR devices, burn out the solenoid as these power supplies maintain at 24VDC. There are no power supplies available for this application anymore. In addition the Monarch 18 exit devices are also discontinued.
Per Monarch the only upgrade path involves new devices and new power supplies.
Is there a follow up question that we can perhaps attempt to answer? We take pride deep in our technical expertise, as we know it separates us from our competition, so don't hesitate to ask.
Please reply to this email or contact our sales department here:
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if we can assist you by answering further questions or with entering this order and please let us know if there is anything else we can help with.
Q: Where is the cross reference list for PS800 to PS900 series power supplies?
A: The following Legacy information is important to understand before cross referencing power supplies:
PS-900 option boards will NOT install onto the legacy power supplies. This includes battery and fire alarm boards.
Legacy option boards (873-4TD, DCM, RCM, etc.) will NOT install onto the PS-900 supplies.
All option boards now switch positive voltage.
If a customer needs to replace a legacy power supply consisting of the following options, then the replacement supply can be built from the cross reference table. No option boards
Fire alarm or battery only
2Q only (with or without fire or battery)
871-2 only (with or without fire or batterIf a customer needs to replace a legacy power supply which contains logic boards then consult Technical Services to confirm that correct replacement hardware is specified.IMPORTANT: The enclosure sizes are different.
PS800 series power supplies are 10" H x 12.5" W x 5" D
PS900 series power supplies are 14" H x 12" W x 4" D.After determining the legacy power supply, refer to the PS-900 Cross-Reference Guide as seen here:
Download File
Q: What would cause a PS873 power supply to put out higher than 24Vdc?
A: If the power supply is putting out approximately not more than 10% of the rated voltage that I would say that the power supply is operating within normal parameters however if it is beyond that, the regulator on the main PS873 circuit board has failed. Replace the PS873 with PS914 power supply as seen here:
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Q: Is the Battery Backup still available for the PS873?
A: While the Von Duprin PS873 Standard Power Supply is a discontinued power supply with no technically available parts we can however certainly supply you with replacement batteries for an existing installation.
You will notice that on page 3 of the installation instructions as seen here:
Download File
and referenced here in the current product line up of power supplies (the PS902, PS904, PS906 & PS914) as seen here:
Download File
The reference to the Von Duprin part number 991280 as the compatible battery which can be reviewed and purchased here:
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Q: Does the PS 914 RFK include the former 873 box?
A: The PS914-RFK retrofit kit power supply includes the former PS873 enclosure and the installation instructions of the PS914-RFK can be reviewed here:
Download File
Q: What size is the fuse in the PS873?
A: The DC output fuse in the PS873 power supply is 4 AMP slow blow.
Q: Was the old Von Duprin PS871 power supply replaced by the PS873-2?
A:
The Von Duprin PS873-2 power supply replaced the old Von Duprin PS871 power supply.
The Von Duprin PS914-2RS power supply replaces the PS873-2 or PS871 power supply and is currently the supply recommended for Von Duprin electrified exit devices.
Q: Why is my PS873 outputting 27 volts?
A: If PS873 power supply provides more than 26.4VDC replace the power supply wuth either a PS873 as seen here:
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Or its replacement the PS914 as seen here:
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Q: can i use the 873-2 for a maglock,, How?
A: Step 3 on page 2 of the document as seen here shows a very typical wiring condition for a magnetic lock:
Download File
Magnetic lock is going to be the fail-safe electric locking device example and a typical push button switch would be the Locknetics 623GIDEX 1-5/8" Glow in the Dark Exit Button
as seen here:
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Are there any follow-up questions that we can attempt to answer?
Q: Are the PS914 and PS873 option boards interchangeable?
A: The optional boards for PS914 and PS 873 are not interchangeable.
Q: Does the 900-BBK option for the PS900 series recharge the batteries?
A: Yes, the 900-BBK is a kit that contains the battery backup circuit board and (2) 12V 7 amp/hour batteries which will provide battery back up to the unit when AC fails and will also charge the batteries when the AC power is present.
The 900-BBK kit includes the 900-BB which is the circuit board for battery backup that attaches to the main power supply board and the 900-BAT which is a kit containing (2) 12V 7 amp/hour batteries that connect to the 900-BB.
Q: Can the new 900-2Q option board be used with an old Von Duprin PS873 power supply?
A: The old 800 series power supplies and boards and the new 900 series power supplies and boards are not compatible with one another.
Resolution: The PS900 power supplies will only accept the 900-XX option boards.
Q: Are the legacy Von Duprin PS873 and the current PS900 power supplies filtered and regulated?
A: The Von Duprin PS873 and PS900 series power supplies are filtered and regulated.
Q: CX will not arm. Red light on solid waits 10 sec, light goes out and cycle repeats
A: Inadequate power or wrong gauge wire is used the inrush current demand by CX will overload and shutdown the power supply. You must use the Von Duprin PS873 or newer PS914 supply.
Related solution: What wire gauge and run is recommended for Von Duprin electric latch retraction EL device?:
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Q: How Do I add a BBK to the PS873?
A: You would need to purchase the PS873-BB
battery backup board for that unit naturally along with properly rated batteries. An overview of the battery backup can be seen on page 3 of the installation instructions as seen here:
Download File
Q: What power supply replaces the PS 873?
A: The standard Von Duprin PS873 power supply was replaced by the PS914 power supply.
NOTE: The newer PS900 option cards can NOT be used in the PS873 power supplies. The PS873 option cards also can NOT be used in the newer PS900 series power supplies.
Attached tables are power supply cross reference, power supply option board and power supply option board compatibility as seen here:
Download File
Q: What would cause a PS873 power supply to put out higher than 24Vdc?
A: The regulator on the main PS873 circuit board has failed. Replace the PS873 with PS914 power supply.
Q: What is the new option for the old 873-AC board?
A: When the new PS900 series power supplies were created we did not pursue a version of these option boards. Need to discuss the specific hardware they are using and requirements to determine the appropriate hardware.
873-AC (access control) and 873-AL (alarm) boards were the option boards for PS873 power supply.
There are no replacement for 873-AC and 873-AL option boards when ordering a new PS900 series power supplies.
The 873-AC and 873-AL boards were used for Access Control systems and alarm output openings and they were not commonly Q: Why is the Von Duprin PS873 power supply buzzing or chattering?
A: Some transformers in the power supplies provide a little humming noise and that is normal. If the humming in Von Duprin PS873 power supply is loud follow these steps.
Remove the load from the output of the power supply and see if the humming stops. If it does, You may have grounding or over load issue.Verify PS873 is putting out 24VDC plus or minus 10%. The buzzing could be caused by the main board putting out excessive voltage. If this is the case you will need to replace the PS873 main board and if not available move to the PS914-XX supply and new option cards.The potted module at the electrified exit device may be faulty. Check voltage out of potted module on green and yellow. Should measure 0, if holding voltage on yellow indicates pull coil is remaining energized and pulling power supply down, replace the potted module.If using a battery backup board, overcharged batteries may cause the power supply to chatter. Disconnect the batteries and see if the chattering will stop. If it will, remove AC voltage and connect the batteries and let batteries to operate the hardware for awhile. Q: my ps-873 power supply doesnt have 24 volts. fuse is good.
A: How many volts is it producing?
Q: What replaces the Von Duprin PS873 Power Supply
A: The PS900 series of power suppllies replace the PS873. Please note only the PS900 series is UL294 compliant. PS873 is not UL294 compliant.
Q: How to I confirm there is output voltage present on the Von Duprin PS873 FA?
A: The video as seen here will explain how to confirm there is output voltage present on your PS873 FA power supply:
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Q: What is the most common practice for running electric power from a frame to the door and hardware?
A: Electrical hinges or a power transfer units are the most commonly used practices to run electric power to locks and/or strikes.
Electric Hinges:
Most electric hinges will fit into a standard 4 1/2" or 5" hinge preparation with a modification the the reinforcing for the wire to pass through. Electric hinges are recommended to be used in the center hinge position.
Power Transfers:
There are two common types of power transfer units; surface or concealed.
Surface power transfers (armored door cord, door loop) are considered the most economical solution and can be used on existing openings, or prepared in the field for new construction. Consult local AHJ for fire rated openings.
Concealed units (EPTs) are factory prepared and approved for fire rated openings.
When electric hinges or power transfers are used with electrical locks and/or strikes a conduit (raceway) is recommended in the door. The conduit is run from hinge side preparation to lock/strike preparation. When used with electrical panic devices, most electrical connections are through the hinge side mounting of device and no conduit is required in the door.
No conduit is supplied in frame and must be done in field at time of installation.
Q: what is the SC contact on the logic board stand for?
A: Where on the circuit board do you see "SC"?