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BL20 electronic module

Relay Module, 2 Complementary Contacts

BL20-2DO-R-CO

Type

BL20-2DO-R-CO

ID

6827030

Number of channels

2, complementary contacts, galvanically isolated

Rated voltage from the supply terminal

24 VDC

Nominal current from field supply

ð

20 mA

Nominal current from module bus

ð

28 mA

Power dissipation, typical

ð

1 W

Output connectivity

Screw, tension spring

Outputs

Load type

resistive, inductive, lamp load

Rated load voltage

230/30 VAC/DC

Simultaneity factor

1

Useful lifetime at 230 VAC, 5 A

100000

Useful lifetime at 230 VAC, 0.5 A

1000000

Output current with DC voltage (resistive)

see load limit curve

Electrical isolation

electronics for the field level

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

1517 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 channels as changeover contacts

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.

Load limit curve

Definition: At 1000 switching cycles, a stand-

ing electric arc of > 10 ms may not occur.