It has a battery OK contact closure output, and a jumper to set the battery test interval to 10 minutes (default) or 15 seconds. The installation instructions say the battery test current is 2.5A for 60ms.
From: Mike Hammett Sent: Saturday, May 09, 2015 1:20 PM To: [email protected] Subject: Re: [AFMUG] Another DC Question http://www.tracopower.com/products/tsp-bcm.pdf The BCM datasheet doesn't say anything about battery tests. The part the TBL-BC seems to do differently is: ===== The unit incorporates full automatic monitoring for the presence and condition of the battery. Two different battery tests are carried out (passive or active) depending on the battery voltage. Both types of test are carried out once every 60 seconds and the tests last ~2 seconds. If the battery voltage is between ~21.4V and ~25.5V a passive battery test is carried out which only tests the battery voltage but does not draw any current from the battery. Between 25.5V and the maximum battery voltage, an active battery test is carried out in which a current of ~1.2A is drawn from the battery through an internal load for ~2s. If the battery voltage is determined to be below ~23.8 V after any of these tests, then a battery fail notification is given. The battery tests are only carried while the mains voltage is ok. The unit also produces a failure notification in the event of a disconnected or short-circuited battery. In the event of a battery failure in any of these modes, the LED will turn constant RED and a built in open-Collector circuit stops sinking current from to the FAIL output pin. ===== ----- Mike Hammett Intelligent Computing Solutions http://www.ics-il.com Midwest Internet Exchange http://www.midwest-ix.com -------------------------------------------------------------------------------- From: "Ken Hohhof" <[email protected]> To: [email protected] Sent: Saturday, May 9, 2015 1:16:35 PM Subject: Re: [AFMUG] Another DC Question I believe the BCM does have a battery test, maybe not as fancy. My reaction is 60W is kind of low, plus I can use 3 different sizes of TSP from 90 to 360W with the same BCM or alone as just a power supply or add the BCM later. And if it fails, I only have to replace the failed unit. And if the BCM fails, the site can run on just the TSP if I don’t have a spare. And there is a 48V version of the BCM. So it seems more flexible. From: Mike Hammett Sent: Saturday, May 09, 2015 12:22 PM To: Animal Farm Subject: [AFMUG] Another DC Question Has anyone looked at the Traco TBL-BC before? It seems to do a lot things other than basic battery charging and even temperature compensation. It's not all that big, but may be good for repeater sites. Seems to be about the same cost for a bigger power supply and regular BCM as this guy, but the alternative wouldn't have the battery testing system. http://www.powergatellc.com/pdfs/TBL-BC.pdf ----- Mike Hammett Intelligent Computing Solutions http://www.ics-il.com Midwest Internet Exchange http://www.midwest-ix.com
