Loyola Enterprises

A veteran and minority owned SDB Certified Business.

Electro-Voice















DEM Series


757.498.6118 Ext - 109DEM313 - Call for pricing - 2RU Charging Unit
757.498.6118 Ext - 109DEM314 - Call for pricing - 3RU Battery and Charger
757.498.6118 Ext - 109DEM316 - Call for pricing - Battery Components
757.498.6118 Ext - 109DEM317 - Call for pricing - Battery Components

Downloads

PDFDEM Series Specifications (pdf)

PDFDEM 316/317 Manual (pdf)

PDFDEM 314 Manual (pdf)

PDFDEM 313 Manual (pdf)


The DEM series of emergency power supply components for ProAnnounce provide reliable backup power for critical notification applications. All emergency notification and alarm devices require 2 independent energy sources, both of which must be able to power the alarm device alone. One of the energy sources must be the general mains supply or a similar network in non-stop operation. The other must be part of the apparatus (e.g. a battery) or an equivalent network fused separately. If the mains power supply is interrupted, the second source of energy must guarantee constant non-stop operation automatically and without interruption. If the energy source belonging to the alarm device consists of a battery, the user must ensure that the batteries used are suitable for stationary and floating operation.

The power supply for alarm devices must not be used to supply other apparatus or parts. However, electrical equipment which serves to pass on messages may also be powered by the said source. An automatic charging device is required to charge and maintain the battery. It must be able to charge a battery which is discharged to its discharge voltage up to 80% max of its rated capacity within 24 hours. The battery capacity must be sufficient to guarantee the fixed alarm duration at the end of the stored energy time. When selecting new batteries, the user should make sure that their capacity is sufficient to compensate the capacity loss due to natural aging of the batteries during the prescribed service life.

The DEM313 charging unit was especially designed for fully automatic charging and monitoring of batteries in the emergency power supplies of alarm devices. In conjunction with the battery modules DEM316 with 38 Ah or DEM317 with 65 Ah rated capacity, this combination results in a reliable and fail-safe emergency power source for continuous battery power supply operation. The integrated monitoring module ensures permanent battery monitoring. The DEM314 combines the functions of the 313 with a medium duty battery in one self contained 3RU chassis.

Available Models:

  • DEM313: A 2RU charging unit designed to charge and monitor the DEM316 and DEM317 batteries
  • DEM314: A self contained battery and charger in one complete 3RU chassis
  • DEM316 and DEM317: Heavy duty rack mount battery components. (For use with the DEM313 charging unit)

DEM313 Features

  • Fully automatic charging unit 24V/4A for constant I/U battery charging in continuous battery power supply mode
  • regulation of charging voltage with high-efficiency primary switched chopper regulator
  • Charging output with short-circuit and reverse voltage protection
  • Integrated battery monitoring module with overvoltage protection, exhaustive discharge protection, mains voltage monitoring, battery voltage monitoring, charging circuit monitoring, LED fault indicator, collective failure information via floating contact
  • Integrated 3-digit LC display showing charging voltage and charging current
  • Temperature tracking of charging voltage in standby mode
  • Connector BATTERY CONTROL with all control functions and failure indication output
Specifications - DEM313
Mains Voltage 230 V +10%/-15% 50-60 Hz
Safety Class I
Rated Output Voltage 24 V
Voltage Adjustment for battery charging 2.275 V/cell 27.3 V
Tolerance of the Output Voltage at 20°C ±0.37%
Temperature Coefficient of the Charging Voltage -40 mV/°C
Ripple at Nominal Operation ≤0.1%
Static Mains Control at input deviations of +10%/-15% ≤0.05%
Nominal Charging Current 4 A
Current Limitation approx. 4 A
Standby Current at Power Failure 110 mA
Switching Frequency 88 kHz ±10%
Efficiency approx. 83%
Failure Detection OVERVOLTAGE ≥29.6 V
Failure Detection at Battery LOW VOLTAGE ≤25.5 V operation mode charging
Failure Detection at Battery LOW VOLTAGE ≤22.0 V operation mode discharging
Failure Detection at Mains Low Voltage LINE VOLTAGE 165 V ±15% for 230 V AC operation
Failure Detection at Mains Low Voltage LINE VOLTAGE 83.5 V ±15% for 115 V AC operation
Switch-off at BATTERY VOLTAGE ≤19.5 V
Failure Detection at CHARGE CURRENT ≤20 mA
Operating Temperature Range +5°C – +40°C
Storage Temperature Range -40°C – +70°C
Dimensions (HxWxD) 8.8 x 48.3 x 33.5 cm (3.46" x 19.0" x 13.2")
Weight 4.4 kg (9.7 lbs)

DEM314 Features

  • Battery drawer 24V/24Ah with integrated fully automatic charging unit for continuous battery power supply
  • Temperature-compensated control of charging current and charging voltage
  • IU - charging characteristic
  • Exhaustive discharge protection
  • Protection against short circuit and polarity reversal
  • Mains failure information via floating contact
  • Mains and output voltage indication via LEDs
  • Switchable current/voltage indication via LC display
  • Five individual fused outputs, AMP flat-pin plugs
  • Completely maintenance-free lead accumulators with VDS approval and UL certification
Specifications - DEM314
Battery Unit
Nominal Voltage 24 V
Discharge voltage at 25°C 21 V
Nominal Capacity for 20 hr 24 Ah
Nominal Discharge Current I20 1.2 A
Capacity for 5 hr 20 Ah
Capacity for 1 hr 14 Ah
Discharge Current for 5 hr 4.1 A
Discharge Current for 1 hr 14 A
Max. Discharge Current 50 A
Standby Current at Mains Failure 150 mA
Number of Outputs 5
Internal Resistance for 7.5 A output approx. 50 mΩ
Charging Unit
Mains Voltage 230 V 10% 50-60 Hz
Rated Output Voltage 24 V
Voltage Adjustment for battery charging 2.3 V/cell 27.6 V
Temperature Coefficient of the Charging Voltage -47 mV/°C
Nominal Charging Current 0.95 A
Operating Temperature Range +5°C – +40°C
Dimensions (HxWxD) 37.0 x 48.3 x 13.3 cm (14.6" x 19.0" x 5.24")
Weight 26.6 kg (58.6 lbs)

DEM316/317 Features

  • Rated voltage 24V
  • Energy storage completely maintenance-free, universal-location lead batteries with grid plates and fixed electrolyte, suitable for cycle operation, continuous battery power supply and trickle charge
  • Exhaustive discharge protection relay controlled by DEM 313 charger
  • Charging input and battery fused outputs via AMP flat-pin plugs
  • Temperature tracking of charging voltage at standby charge depending on the battery temperature with integrated temperature sensor
  • Batteries with VDS registration and UL recognition
Specifications - Battery Modules
DEM316DEM317
Nominal Voltage 24 V 24 V
Discharge voltage at 25°C 19.5 V 19.5 V
Nominal Capacity for 20 hr 38 Ah 65 Ah
Nominal Discharge Current I20 1.9 A 3.25 A
Capacity for 5 hr 33 Ah 55 Ah
Capacity for 1 hr 23 Ah 39 Ah
Discharge Current for 5 hr 6.6 A 11 A
Discharge Current for 1 hr 23 A 39 A
Max. Discharge Current 100 A 150 A
Standby Current at Mains Failure 200 mA 300 mA
Number of Outputs 14 21
Internal Resistance for 7.5 A output approx. 50 mΩ
End-of-Charge Voltage in Standby Operation at 20°C 27.3 V
Temperature Adaption -40 mV/°C
Nominal Charging Current 4 A
Dimensions (WxD) 48.3 x 37.0 cm (19.0" x 14.6")
-Height 17.8 cm (7.0") 35.6 cm (14.0")
Weight 36.1 kg (79.6 lbs) 60.5 kg (133.4 lbs)
Purchasing
For pricing options and packages, contact us at
757.498.6118 Ext - 109, Or