Datasheet

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Industrial Power Supplies
TSP Series 90–600 Watt
TSP–BFM24 Buffer Module
The TSP-BFM24 buffer module will hold the output voltage of a 24 VDC power supply
after brown outs or voltage dips of ten 50 Hz cycles at full road. During this buffer pe-
riod no deterioration of the 24 VDC output voltage will occur. For many applications
this buffer module is an ideal and cost effective alternative to a battery based backup
system. The buffer module consists of a large bank of capacitors. When the power
supply is switched on, the buffer capacitors will be charged. This will take approxima-
tely 30 second and an opto-coupler signal indicates the “READY“ condition. When
a power fail occurs, the capacitor bank is discharged, maintaining the output of the
buffer module at its nominal voltage. This condition is indicated by an “POWER FAIL“
signal. The hold up time is typically 200 ms at 25 A and 4 seconds typically at 1,2 A.
After 4 seconds the buffer device will switch off the output voltage. The operating
modes of the module are also indicated by a LED on the front panel also. The major
advantage of this buffer solution is, that it is fully maintenance free and its storage
capability does not deteriorate over the live time of the product.
Order code
(includes terminal plugs)
Operating Voltage
Range
Buffer Time Output Power
max.
TSP-BFM24
24...28VDC
200ms typ. @ 25A max.
4.0 s max. @1.2A
600 W
Models
Function Diagram Connector Positions
TSP
Load
Inhibit
Volt adjust
Voltage
Detection
Voltage
Detection
Discharge
Charge
Active
Read
y
J2.2
J2.1
J1.1
J1.2
J1.3
J1.4
J2.4
J2.3
J2.6
J2.5
Specifications
Operating temperature –25°C to +70°C max.
derating above 40°C : 1.5 %/K
Electromagnetic compatibility in correspondence to connected units
(no internal switching device)
Buffer voltage adjustable, >1 V below input voltage, min. 22 VDC
Charging 0.6 A max. / 30s max.
Status signals Buffer Active , Buffer Ready (optocoupler output)
and dual colour LED for status indication
Inhibit optocoupler input: 35V max. <5mA
Reliability, calculated MTBF at +25°C acc. to IEC 61709 >3.3 Mio h
Dimensions see page 10
Safety approvals – CB test certificate IEC 60950-1 (SIQ for EN) www.tracopower.com/products/tsp-bfm24-cb.pdf
Installation instructions www.tracopower.com/products/tsp-bfm-inst.pdf