UCERB 24

CyberResearch® Digital I/O

Power

Table 4-2. Power specifications

Parameter

Conditions

Specification

 

 

 

USB +5 V input voltage range

 

4.75 V min. to

 

 

5.25 V max.

USB +5 V supply current

All modes of operation

10 mA max

External power supply (required)

 

9 V ±10% @ 3 A

Voltage supervisor limits - PWR

Vext < 6.0 V, Vext > 12.5 V

PWR LED = Off

LED

 

(power fault)

 

6.0 V < Vext < 12.5 V

PWR LED = On

External power consumption

All relays on, 100 mA downstream hub

1.5 A typ, 1.8 A max

 

power

 

 

All relays off, 100 mA downstream hub

230 mA typ, 270 mA max

 

power

 

External power input

Table 4-3. External power input specifications

Parameter

Conditions

Specification

 

 

 

External power input

 

+6.0 VDC to 12.5 VDC (9 VDC power supply

 

 

included).

Voltage supervisor limits - PWR LED

6.0 V > Vext or Vext >

PWR LED = Off (power fault)

(Note 1)

12.5 V

 

 

6.0 V < Vext < 12.5 V

PWR LED = On

External power adapter (included)

 

+9 V ±10%, @ 3 A

 

 

 

Note 1: The UCERB 24 monitors the external +9 V power supply voltage with a voltage supervisory circuit. If this power supply exceeds its specified limit, the PWR LED will turn off indicating a power fault condition.

External power output

Table 4-4. External power output specifications

Parameter

Conditions

Specification

 

 

 

 

External power output - current

 

4.0

A max.

range

 

 

 

External power output (Note 2)

Voltage drop between power input and daisy chain power

0.5

V max

 

output

 

 

Compatible cable(s) for daisy

C-MAPWR-x

x = 2 , 3 or 6

chain

 

feet

 

Note 2: The daisy chain power output option allows multiple boards to be powered from a single external power source in a daisy chain fashion. The voltage drop between the module power supply input and the daisy chain output is 0.5 V max. Users must plan for this drop to ensure the last module in the chain will receive at least 6.0 VDC.

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©Copyright 2005 CyberResearch, Inc.