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BL20 electronic module

2 Analog Outputs for Current

nBL20-2AO-I(4...20MA)

Type

BL20-2AO-I(0/4...20MA)

ID

6827034

Number of channels

2

Rated voltage from the supply terminal

24 VDC

Nominal current from field supply

ð

50 mA

Nominal current from module bus

ð

40 mA

Power dissipation, typical

ð

1 W

Output connectivity

Screw, tension spring

Outputs

Output type

0/4…20 mA

Load resistance, resistive

< 0.45 kò

Load resistance, inductive

< 1 mH

Electrical isolation

electronics for the field level

Basic fault limit at 23 °C

< 0.2 %

Repeatability

0.05 %

Temperature coefficient

< 150 ppm/°C of full scale

Resolution

16 Bit

Measured-value display

16 bit signed integer

12 bit full range left-justified

Cycle time

ð

10 ms

Number of parameter bytes

6

Dimensions (W x L x H)

12.6 x 74.1 x 55.4 mm

Approvals

CE, cULus, zone 2, Class I, Div. 2

Ambient temperature

0…+55 °C

Storage temperature

-25…+85 °C

Relative humidity

15…95 %, no condensation allowed

Vibration test

Acc. to EN 61131

Shock test

Acc. to IEC 60068-2-27

Drop and topple

acc. to IEC 68-2-31 and free fall to IEC 68-2-32

Electromagnetic compatibility

Acc. to EN 50082-2

Protection class

IP20

MTTF

712 years acc. to SN 29500 (Ed. 99) 20 °C

■ Fieldbus and connection technology inde-

pendent

■ Protection class IP20

■ LEDs indicate status and diagnostic

■ Electronics galvanically separated from the

field level via optocouplers

■ 2 analog outputs 0/4…20 mA

Functional principle

BL20 electronic modules are plugged into the

purely passive base modules which are used

for connection of field devices. Maintenance is

significantly facilitated due to separation of the

connection level from the module electronics.

Furthermore flexibility is enhanced because

the base modules provide a choice of tension

spring or screw connection technology.

The electronic modules are completely inde-

pendent of the type of higher level field bus

through the use of gateways.