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1

Multiturn absolute encoder

DVM78E

Technical Data

General specifications

Detection type

photoelectric sampling

Device type

Multiturn absolute encoder

Functional safety related parameters

25 a

20 a

7.7 E+9 at 3000 rpm

Diagnostic Coverage (DC)

0 %

Electrical specifications

10 ... 30 V DC

max. 230 mA at 10 V DC

max. 100 mA at 24 V DC

< 250 ms

Linearity

± 2 LSB at 16 Bit, ± 1 LSB at 13 Bit, ± 0,5 LSB at 12 Bit

Output code

binary code

Code course (counting direction)

cw ascending (clockwise rotation, code course ascending)

cw descending (clockwise rotation, code course

descending)

Interface

Interface type

DeviceNet

Resolution

Single turn

up to 16 Bit

Multiturn

14 Bit

Overall resolution

up to 30 Bit

Transfer rate

max. 0.5 MBit/s

Connection

Cable

Terminal compartment

see ordering information

Standard conformity

Degree of protection

DIN EN 60529, IP66

Climatic testing

DIN EN 60068-2-3, no moisture condensation

Emitted interference

EN 61000-6-4:2007

Noise immunity

EN 61000-6-2:2005

Shock resistance

DIN EN 60068-2-27, 100 g, 3 ms

Vibration resistance

DIN EN 60068-2-6, 10 g, 10 ... 2000 Hz

Ambient conditions

Operating temperature

-40 ... 70 °C (-40 ... 158 °F)

Storage temperature

-40 ... 85 °C (-40 ... 185 °F)

Mechanical specifications

Material

Combination 1

housing: anodized aluminum

flange: anodized aluminum

shaft: Stainless steel 1.4401 / AISI 316

Combination 2 (Inox)

housing: stainless steel 1.4404 / AISI 316L

flange: stainless steel 1.4404 / AISI 316L

shaft: Stainless steel 1.4401 / AISI 316

Mass

approx. 2600 g (combination 1)

approx. 3900 g (combination 2)

Rotational speed

Moment of inertia

Starting torque

≤ 4 Ncm

Shaft load

Axial

60 N

Radial

80 N

Data for application in connection with

hazardous areas

EU-type examination certificate

ITS 15 ATEX 18372X

IECEx ITS 15.0061X

Marking

¬

II 2G Ex d IIC T5 Gb

¬

II 2D Ex tb IIIC T100°C Db

Directive conformity

Directive 2014/34/EU

IEC 60079-0:2011 , EN 60079-0:2012+A11:2013 , IEC

60079-1:2014 , EN 60079-1:2014 , IEC 60079-31:2013 , EN

60079-31:2014

Model Number

DVM78E

Features

•Up to 30 Bit multiturn

• ATEX approval

• IECEx approval

• Flameproof enclosure

• Removable connection cap

Description

Absolute encoders deliver an absolute step value

for each angle setting. All these values are

represented by code samples on one or more code

disks. The code disks are screened by an infrared

LED and the bit obtained sample is detected by an

optical array. Its signals are electronically amplified

and are forwarded on to the interface for

processing.

The absolute encoder has a maximum basic

resolution of 65536 steps per revolution (16 Bits). In

the multiturn design, additional up to

16384 revolutions (14 Bits) can be resolved. This

results in a total maximum resolution of

1073741824 steps (30 Bits).

The integrated CAN bus interface of the absolute

encoder supports all DeviceNet functions. The

following operating modes can be programmed,

and can be selectively turned on or off:

•

Polled mode

•

Change of state mode

•Cyclic mode

The device is designed for shaft assembly and is

available in servo flange or clamping flange design.

The bus electronics module is integrated into the

removable housing cover. This makes it possible to

mount or replace the new rotary encoders and the

matching bus electronics separately during

installation or service.