ADCP-75-214 • Issue 2 • September 2006

5.3PDU (Power Distribution Unit)

Table 4 provides typical specifications for the PDU.

Table 4. Power Distribution Unit (PDU) Specifications

CATEGORY

PARAMETER

 

SPECIFICATION

Electrical

Input voltage range

 

20–56VDC positive/negative ground

 

 

 

 

(Input polarization protected)

 

 

 

 

 

Output voltage

 

15V, 4% (Over voltage protection)

 

 

 

 

Output voltage accuracy

4% in 20mA – 400mAMAX 10% in 1.5A

 

 

 

 

 

Output ripple

 

100mV pk – pk

 

 

 

 

 

PDU Inrush Current

 

ETS300132-2, Part 2

 

 

 

 

Short circuit protection

1500mA, 10%

 

 

 

 

Connector and

Outputs for TMA's

 

SMB connector Male (3 pcs)

LED

 

 

 

 

Input connector

 

Molex Micro-fit 43045 - 0400

 

 

 

 

 

 

General alarm connector

Molex Mini-Fit 39-30-3035

 

 

 

 

Communications link between BTS

Molex Mini-Fit 39-30-3035

 

and RET

 

 

 

 

 

 

 

Indicators

 

Two color LED (3 pcs) (green and yellow)

 

 

 

 

Red LED 1 pcs

 

 

 

Physical

Dimensions (W x H x D)

194.4 x 43.6 x 100.0 mm

 

 

 

 

(7.7 x 1.7 x 3.9 inches)

 

 

 

 

 

Weight

 

0.5 Kg (1.2 lbs.)

 

 

 

 

 

Color

 

Gray Metallic

 

 

 

 

Communication

Pin Number

 

Signal

Comments

 

 

 

 

 

 

1

 

RS485 A

RET control command AISG Layer2. ISO/

 

 

 

 

IEC 8482:1993 (RS485).

 

 

 

 

 

 

2

 

RS485 B

 

 

 

 

 

 

 

3

 

RS485 GND

 

 

 

 

 

 

PDU only receives control command from BTS and modulates 2.176MHz Modem

 

Signal and transmit to TMA through SMB connector, and vice versa.

 

 

 

 

Resistance between RS485 A and

> 1k Ohm

 

RS485 B

 

 

 

 

 

 

Resistance between RS485 A or

> 1k Ohm

 

RS485 B and DC return / RS485 GND

 

 

 

 

 

Capacitance between RS485 A or

< 1nF

 

RS485 B

 

 

 

 

 

 

Capacitance between RS485 A or

< 1nF

 

RS485 B and DC/RS485 GND

 

 

 

 

 

 

Page 20

© 2006, ADC Telecommunications, Inc.