5
1.1.1 Technical Specifications
Note:
The power supply must be Class 2, Power Limited. For residential applications a suitable power adaptor
is model DSC ADP1310(W)-NA.
Table 1-1 Ratings
Power Supply Ratings
LE4020
LE4020CF
Input Voltage:
10 Vdc to 28 Vdc (use separately listed con-
trol panel or power supply) or use DSC
ADP1310/1320(W)-NA power adapter with
battery 12V/7Ah
120 Vac/60Hz
Current Consumption
Average Transmitter PWB Current:
140 mA* (with PSTN connected)
155 mA* (without PSTN connected)
PWB Transmission Current:
225 mA*
Rated Current:
500 mA using listed control panel or power
supply
700 mA using power adapter
0.3 A
* Plus any current drawn from the LE4020/LE4020CF AUX+ terminal (200 mA). Each of the four PGM outputs can be loaded up to 50 mA
(max)
Working Voltage Range
With Battery:
Use the DSC ADP1310/1320(W)-NA power
adapter
Use internal PS4085 power supply module
Without Battery:
10 Vdc to 28 Vdc (external power supply
N/A
Battery Type:
sealed, rechargeable type, rated 12 V / 7 Ah (for 24 hr standby time plus 5 min alarm)
Battery charging voltage:
13.75 Vdc
Battery charge current limit:
360 mA
700 mA
NOTE:
Battery must be replaced every 3 to 5 years.
NOTE:
When using the battery, use DSC ADP1310(W)-NA power adapter.
Operating frequency - 3G (UMTS/HSPA):
850 MHz / 1900 MHz
For LE4020 operating frequencies, see Table 1.2.
Antenna gain:
2.0 dBi
Environmental Specifications
Operating temperature:
0°C-49°C (32°F-120°F)
Humidity:
93%RH Maximum (non-condensing)
Mechanical Specifications
White cabinet dimensions:
257.2 mm x 161.9 mm x 76.6 mm / 10.125” x 6.375” x 3.0”
Weight (without battery):
1.28 kg / 2.8 lb
Red cabinet dimensions:
295.3 mm x 258.4 mm x 77.0 mm / 11.625” x 10.175” x 3.03”
Weight (without battery):
2.52 kg / 5.5 lb
Simulated Telco Loop specifications (TIP/RING)
On-Hook Voltage:
12 Vdc
Off-Hook Voltage (Maximum):
35 Vdc
Loop Current:
25 mA
Loop Resistance:
600 Ohms
