What is the low battery threshold for the AD and CO Locks?

Resolution:

Information on low battery threshold and nuisance delay is noted below: New firmware now has improved levels.

- These are approximate values/levels which change with measurement meters and measurement point.

You must have 4 volts or more battery/power supply level for the USB to connect and communicate with the SUS/HHD. If the battery/power supply voltage is lower than 4.0 the SUS/HHD will not connect to the AD/CO-Series Locks. This is true for all FW versions.

The AD300 must never be powered with batteries. The AD300 requires 12 or 24 VDC 250 ma AUX power. The AD300 must be powered from a external AUX supply to provide sufficient power for the RS-485 communication, the AD300 will not function on batteries.

Reader types determine voltage levels needed for operation. Locks with smart card readers, SM & MT, require higher voltage levels. Locks with Prox and Mag card readers can operate to lower voltages.

Low Battery is indicated with a nuisance delay with nine red blinks before UNLOCK on the AD200 & AD250.

The AD400 reports LOW Battery to the ACP (The AD400 has no nuisance blink/delay) 

Critical Battery is when the LOCK goes to Fail mode of "As-is; Safe, Secure."

AD400/AD200/AD250 After ADFwPkg 2.17.0 - June 2011

• 4 Battery Holder
• New batteries = 6.2 VDC
• Low battery threshold is 4.7 VDC for SM & MT - and 3.7 VDC for MAG and PROX (USB stops working at 4 VDC)
• Critical battery threshold is 4.6 VDC for SM & MT - and 3.4 VDC for MAG and PROX (USB stops working at 4 VDC)
• Coin cell = New/Full is 3.0 VDC. low is 2.8 VDC

 

 

AD400/AD200/AD250 After ADFwPkg 2.17.0 - June 2011

• 8 Battery Holder
• New batteries = 12.4 VDC
• Low battery threshold is 7.2 VDC
• Critical battery threshold is 6.9 VDC
• Coin cell = new/full is 3.0 VDC, low is 2.8 VDC
  

CO200
4 Battery Holder (ONLY)

• New batteries = 6.2 VDC
• Low battery threshold is 4.2 VDC
• Critical battery threshold is 3.9 VDC
• Coin cell = new/full is 3.0 VDC, low is 2.8 VDC
  

CO250
4 Battery Holder (ONLY)

• New batteries = 6.2 VDC
• Low battery threshold is 4.2 VDC
• Critical battery threshold is 3.9 VDC
• Coin cell = new/full is 3.0 VDC, low is 2.8 VDC

 

CO200 & CO250 Disable coin cell Nuisance delay and blink,

With CO.A.7 and SUS 4.10.2 or newer for CO200 and CO250, you can use the SUS/HHD, under Lock Properties, Edit, to de-select, DISABLE, the "Coin Cell Nuisance Delay" and the nine blink warning indication. 

The coin cell is only a back up voltage source for the real time clock. Changing the coin cell battery on an CO-Series lock is difficult. Customers can now decide to install fresh AA batteries and set the real time clock with the SUS during AA battery changes and not replace the coin cell. The real time clock works with just AA batteries, and no back-up. With the low coin cell nuisance delay and blink disabled by the SUS only low AA batteries will provide a nuisance warning.