AKT2G-AN-430-000

4-channel analog input, parameterizable, -10/0…+10 V, -20/0/+4…+20 mA, 16 bit

See Also:

Related Topics: Map Input and Output to Variables

Configuration of 0/4..20 mA Differential Inputs

This section describes the 0/4..20 mA differential inputs for terminal series AKT2G-AN-430.

For the single-ended 20 mA inputs the terminal series AN-430 they only apply with regard to technical transferability and also for devices whose analog input channels have a common related ground potential (and therefore the channels are not to each other and/or not to power supply electrically isolated). Herewith an example for an electrically isolated device is the terminal AN-430.

Technical Background

The internal input electronics of the terminals referred to above have the following characteristic (see Figure 8-13: Internal connection diagram 0/4...20 mA inputs):

  • Differential current measurement, i.e. concrete potential reference is primarily not required. The system limit applies is the individual terminal AN-430.
  • Current measurement via a 33 Ω shunt per channel, resulting in a maximum voltage drop of 660 mV via the shunt
  • Internal resistor configuration with GND point (A) central to the shunt

    The configuration of the resistors is symmetric, such that the potential of (A) is central relative to the voltage drop via the shunt.

  • All channels within the terminal have this GNDint potential in common.
  • the common GNDint potential (A)
    • is connected for 1 and 2 channel terminals to a terminal point and not with GNDPC (power contact).
    • is connected for 4 channel terminals with GNDPC
  • The center point of the voltage drop over the 33 Ω shunt is referred to common mode point (CMP). According to the technical product data, the maximum permitted UCM voltage (common mode) refers to the potential between the CMP of a channel and the internal GND or the potential between the CMP of 2 channels within a terminal.

    It must not exceed the specified limit (typically ±10 or ±35 V).

Accordingly, for multi-channel measurements UCM specifications must be followed.

Figure 8-13: Internal connection diagram 0/4...20 mA inputs

The block diagram for a 2 channel terminal shows the linked GND points within the terminal (Internal connection diagram for 0/4..20 mA inputs of a AKT2G-AN-430):

Figure 8-14: Internal connection diagram for 0/4..20 mA inputs of a AKT2G-AN-430

For all channels within the terminal UCM-max must not be exceeded.

Summary

  • We recommended connecting GNDint with a low-impedance potential, because this significantly improves the measuring accuracy of the AN-430.

    Please note the instructions relating to the UCM potential reference.

  • The UCM potential reference must be adhered to between CMP ↔ GNDint and CMPch(x) ↔ CMPch(y).

    If this cannot be guaranteed, the single-channel version should be used.

  • Terminal configuration:
    • AN-430: GND is connected with the negative power contact. The external connection should be such that condition 2 is met.

If the sensor cable is shielded, the shield should not be connected with the GNDint terminal point but with a dedicated low-impedance shield point.

  • If terminal points of several AN-430 terminals are connected with each other, ensure that condition 2 is met.

  • Connection of GNDint

    To achieve a precise measurement result GNDint should be connected to a suitable external low-impedance potential, taking account the specifications for UCM.

    In the AN-430 terminals GNDint is already connected with the negative power contact. Here too the specifications for UCM must be followed.

CoE Object Description and Parameterization

Restore Object

Index 1011 Restore default parameters

Index (hex)

Name

Meaning

Data type

Flags

Default

1011:0

Restore default parameters

Restore default parameters

UINT8

RO

0x01 (1dec)

1011:01

SubIndex 001

If this object is set to “0x64616F6C” in the set value dialog, all backup objects are reset to their delivery state.

UINT32

RW

0x00000000 (0dec)

Configuration Data

Index 80n0*** AI settings (for 0 ≤ n ≤ 3)

Index (hex)

Name

Meaning

Data type

Flags

Default

80n0:0

AI Settings

Maximum subindex

UINT8

RO

0x18 (24dec)

80n0:01

Enable user scale

User scale is active.

BOOLEAN

RW

0x00 (0dec)

80n0:02

Presentation

  1. Signed presentation
  2. Unsigned presentation
  3. Absolute value with MSBClosed"Most significant bit" Sometimes abbreviated as MSB, the most significant bit is the bit position in a binary number having the greatest value as sign
    Signed amount representation

BIT3

RW

0x00 (0dec)

80n0:05

Siemens bits

The S5 bits are displayed in the three low-order bits

BOOLEAN

RW

0x00 (0dec)

80n0:06

Enable filter

Enable filter, which makes PLCClosed"Programmable Logic Controller" A Programmable Logic Controller, PLC, or Programmable Controller is a digital computer used for automation of industrial processes, such as control of machinery on factory assembly lines. Used to synchronize the flow of inputs from (physical) sensors and events with the flow of outputs to actuators and events-cycle-synchronous data exchange unnecessary

BOOLEAN

RW

0x00 (0dec)

80n0:07

Enable limit 1

Limit 1 enabled

BOOLEAN

RW

0x00 (0dec)

80n0:08

Enable limit 2

Limit 2 enabled

BOOLEAN

RW

0x00 (0dec)

80n0:0A

Enable user calibration

Enabling of the user calibration

BOOLEAN

RW

0x00 (0dec)

80n0:0B

Enable vendor calibration

Enabling of the vendor calibration

BOOLEAN

RW

0x01 (1dec)

80n0:0E

Swap limit bits

Changing of the Limit Bits

BOOLEAN

RW

0x00 (0dec)

80n0:11

User scale offset

User scaling offset

INT16

RW

0x0000 (0dec)

80n0:12

User scale gain

User scaling gain.

The gain is represented in fixed-point format, with the factor 2-16.

The value 1 corresponds to 65536dec (0x00010000) and is limited to ±0x7FFFF

INT32

RW

0x00010000

(65536dec)

80n0:13

Limit 1

First limit value for setting the status bits

INT16

RW

0x0000 (0dec)

80n0:14

Limit 2

Second limit value for setting the status bits

INT16

RW

0x0000 (0dec)

80n0:15

Filter settings

This object determines the digital filter settings, if it is active via Enable filter (index 0x80n0:06). The possible settings are sequentially numbered.

  1. 50 Hz FIR
  2. 60 Hz FIR
  3. IIR 1
  4. IIR 2
  5. IIR 3
  6. IIR 4
  7. IIR 5
  8. IIR 6
  9. IIR 7
  10. IIR 8

UINT16

RW

0x0000 (0dec)

80n0:17

User calibration offset

User offset compensation

INT16

RW

0x0000 (0dec)

80n0:18

User calibration gain

User calibration gain

INT16

RW

0x4000

(16384dec)

  • The filter characteristics are set via index 0x8000:15 (see "80n0:15")

    The filter frequencies are set for all channels of the AN-430 terminals centrally via index 0x8000:15 (channel 1). All other corresponding indices 0x80n0:15 have no parameterization function!

Index 80nD AI Advanced settings (for 0 ≤ n ≤ 3)
Index (hex) Name Meaning Data type Flags Default

80nD:0

AI Advanced Settings

Maximum subindex

UINT8

 RO

0x12 (18dec)

80nD:11

Input Type

Measurement mode, allowed values:

UINT16

 RW

0x0002 (2dec)

0x02

-10..+10 V

0x0E

0..10 V

0x11

-20..+20 mA

0x12

0..20 mA

0x13

4..20 mA

0x14

4..20 mA (NAMUR)

80nD:12

Scaler

Scaling range, allowed values:

UINT16

RW

0x0000 (0dec)

0x00

Extended Range

0x03

0x03 Legacy Range

80nD:17

Low Range Error

Lower threshold for setting the error bit and error led

INT32

 RW

Dependent on 80nD:11

80nD:18

High Range Error

Upper threshold for setting the error bit and error led

INT32

 RW

Dependent on 80nD:11
Index 80nE*** AI internal data (for 0 ≤ n ≤ 3)

Index (hex)

Name

Meaning

Data type

Flags

Default

80nE:0

AI internal data

Maximum subindex

UINT8

RO

0x01 (1dec)

80nE:01

ADC raw value

ADC raw value

UINT16

RO

-
Index 80nF*** AI vendor data (for 0 ≤ n ≤ 3)

Index (hex)

Name

Meaning

Data type

Flags

Default

80nF:0

AI vendor data

Maximum subindex

UINT8

RO

0x02 (2dec)

80nF:01

Calibration offset

Offset (vendor calibration)

INT16

RW

0x0000 (0dec)

80nF:02

Calibration gain

Gain (vendor calibration)

INT16

RW

0x4000 (16384dec)
Index 80nF AI Vendor data (for 0 ≤ n ≤ 3)

Index (hex)

Name

Meaning

Data type

Flags

Default

80nF:0

AI Vendor data

Maximum subindex

UINT8

RO

0x06 (6dec)

80nF:01

R0 offset

Offset (Vendor calibration)

INT16

RW

0x0000 (0dec)

80nF:02

R0 gain

Gain (Vendor calibration)

INT16

RW

0x4000 (16384dec)

80nF:03

R1 offset

Offset (Vendor calibration)

INT16

RW

0x0000 (0dec)

80nF:04

R1 gain

Gain (Vendor calibration)

INT16

RW

0x4000 (16384dec)

80nF:05

R2 offset

Offset (Vendor calibration)

INT16

RW

0x0000 (0dec)

80nF:06

R2 gain

Gain (Vendor calibration)

INT16

RW

0x4000 (16384dec)

Input Data

Index 60n0*** AI inputs (for 0 ≤ n ≤ 3)

Index (hex)

Name

Meaning

Data type

Flags

Default

60n0:0

AI inputs

Maximum subindex

INT16

RO

0x11 (17dec)

60n0:01

Underrange

Value below measuring range.

BOOLEAN

RO

0x00 (0dec)

60n0:02

Overrange

Measuring range exceeded.

BOOLEAN

RO

0x00 (0dec)

60n0:03

Limit 1

Limit value monitoring Limit 1

  1. not active
  2. value is smaller than limit value 1
  3. value is larger than limit value 1
  4. Value is equal to limit value 1

BIT2

RO

0x00 (0dec)

60n0:05

Limit 2

Limit value monitoring limit 2

  1. not active
  2. value is smaller than limit value 2
  3. value is larger than limit value 2
  4. Value is equal to limit value 2

BIT2

RO

0x00 (0dec)

60n0:07

Error

The error bit is set if the data is invalid (over-range, under-range)

BOOLEAN

RO

0x00 (0dec)

60n0:0E

Sync error

The Sync error bit is only required for DC mode. It indicates whether a synchronization error has occurred during the previous cycle.

This means a SYNC signal was triggered in the AN-430, although no new process data were available (0=OK, 1=NOK).

BOOLEAN

RO

0x00 (0dec)

60n0:0F

TxPDO State

Validity of the data of the associated TxPDO (0 = valid, 1 = invalid).

BOOLEAN

RO

0x00 (0dec)

60n0:10

TxPDO Toggle

The TxPDO toggle is toggled by the slave when the data of the associated TxPDO is updated.

BOOLEAN

RO

0x00 (0dec)

60n0:11

Value

Analog input date

INT16

RO

0x0000 (0dec)

Technical Data

Technical Data

AKT2G-AN-430-000

Analog inputs

4 (U differential, I single-ended)

Conversion type

simultaneous

ADC type

SAR

Signal voltage

-10/0…+10 V

Signal current

-20/0/+4…+20 mA

Measuring range, nominal (Full Scale Value)

Voltage measurement range

-10/0…+10 V

Current measurement range

-20/0/+4…+20 mA

Measuring range, technical

Voltage measurement range

-10.73…+10.73 V

Current measurement range

-21.47…+21.47 mA

Measuring error

(full measuring range)

< ±0.3 % (relative to full scale value)

Distributed Clocks

yes

Distributed Clocks precision

<< 1 µs

Support NoCoeStorage

yes

Resolution

16 bit (incl. sign)

Internal resistance

Voltage measurement: > 200 kΩ | Current measurement: 85 Ω typ.

Input filter limit frequency

5 kHz

Common-mode voltage UCM

35 V max. (voltage measurement)

Minimal EtherCATClosed***EtherCAT is an open, high-performance Ethernet-based fieldbus system. The development goal of EtherCAT was to apply Ethernet to automation applications which require short data update times (also called cycle times) with low communication jitter (for synchronization purposes) and low hardware costs cycle time

200 µs

 

Overcurrent protection

50 mA typ.

Bit width of the process image

Inputs: 16 Byte

 

Configuration

no address or configuration settings required

MTBF (+55°C)

-

 

Special features

U/I parameterisable, Extended Range, standard and compact process image, activatable FIR/IIR filters

Supply voltage for electronic

via the E-bus

Current consumption via E-bus

typ. 170 mA

Electrical isolation

500 V (E bus/ fieldbus voltage)

Recommended operating voltage range (ground related to GND/ 0V power contact)

Voltage measurement range

UCM 35 V max.

Current measurement range

single ended,

dielectric strength max. 30 V

Recommended signal range

Voltage measurement range

Extended Range (107%), differential

Current measurement range

Extended Range (107%), single ended

Destruction limit

(ground related to GND/ 0V power contact)

Voltage measurement range

50 V

Current measurement range

30 V

Destruction limit (differential)

Voltage measurement range

50 V

Current measurement range

n.a.

Weight

approx. 65 g

Permissible ambient temperature range during operation

-25…+60 °C

 

Permissible ambient temperature range during storage

-40…+85 °C

 

Permissible relative humidity

95 %, no condensation

Design

HD (High Density) housing with signal LED

Dimensions (W x H x D)

approx. 15 mm x 100 mm x 70 mm (width aligned: 12 mm)

Mounting

on 35 mm mounting rail conforms to EN 60715

Vibration/shock resistance

conforms to EN 60068-2-6/EN 60068-2-27

EMC immunity/emission

conforms to EN 61000-6-2/EN 61000-6-4

Protection class

IP20

Installation position

variable

Approval

CE, cULus