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October 15, 2026 BY
IN Basler Electric

Basler Electric Metering Output Circuits Model RA-70

Metering Output Circuits

These circuits provide the drive voltage or current to a remote position meter. See the Installation chapter

for meter part numbers, mounting, and interconnection information.

Pre-Positioning Function

The reference adjuster provides a pre-position capability (i.e.: automatic return to the pre-set value of

resistance). The Pre-Position function can be programmed to hold the reference adjuster output to a pre

programmed value while ignoring all raise/lower inputs until the Pre-Position function is turned off. The

Pre-Position function can also be pre-programmed to allow the raise/lower inputs to control the reference

adjuster output only after the pre-position setting has been attained.
October 15, 2026 BY
IN Basler Electric

Basler Electric Model RA-70 Power Supply Circuit

Power Supply Circuit

The power supply is available in two different styles. The Type S power supply has a single source input

which accepts only 24 Vdc. The Type D power supply has a dual input (redundant) which accepts both

125 Vdc and 120 Vac simultaneously. Thus, with a Type D power supply, if one of the two input voltages

should fail, the reference adjuster will remain operational by using the other input voltage. Both types of

power supplies provide all the internal operating power for the reference adjuster. Refer to the

Specifications chapter for the input power requirements.

Output Circuits

This circuit provides the necessary control resistance to the various devices that the reference adjuster

will control. Depending upon the type of application, the output will simulate a two-wire rheostat or a

three-wire potentiometer. Refer to the style charts in the Introduction chapter for values and applicability.
October 15, 2026 BY
IN Basler Electric

Basler Electric Model RA-70 Microprocessor-Based Reference Adjuster

The Reference Adjuster is capable of being interfaced with the above listed items and with the following

Basler system control devices:

• Minimum/Maximum Excitation Limiter (EL-200)

• Var/Power Factor Controller (SCP-250)

• Underfrequency/Overvoltage Module (UFOV-260)

The Reference Adjuster can be used for almost any application where rheostat or potentiometer output is

required.

1. For a rheostat output, match the ohmic output from the Style Chart (Figure 1) for the RA-70A

model.

2. For a potentiometer output, match the ohmic output from the Style Charts (Figures 2 and 3) for

the RA-70M or RA-70P models.

Style Charts

The complete model number of the Reference Adjuster is a combination of letters and numbers indicating

the features which are included. Figure 1 is the style chart for Reference Adjusters Having a Voltage

Regulator Interface. Figure 2 is the style chart for Reference Adjusters having a Manual Voltage Control

Interface. Figure 3 is the style chart for Reference Adjusters having a VAR/Power Factor Control

Interface. For example, a Reference Adjuster used with a Voltage Regulator may have a model number of

RA-70 A SC1R. This RA-70 would have the following features:

A) A voltage regulator interface is used

S) 24 Vdc is used for input power

C) The control input is 4 – 20 mA

1) The type of voltage regulator – SR-F, SR-E/H, SSE

R) Dual reference signals are output for twin AVRs
October 15, 2026 BY
IN Basler Electric

Basler Microprocessor-Based Reference Adjuster, Model RA-70

The Basler Microprocessor-Based Reference Adjuster, Model RA-70. replaces Motor Operated

Potentiometers and provides a totally solid-state method of adjusting the setpoint on Basler Automatic

Voltage Regulators (AVRs), Basler Shunt Static Exciter-Regulators (SSEs), Basler Manual Voltage

Controls (MVCs), the Basler Var/Power Factor Controller (SCP-250) and other input devices having a

rheostat or potentiometer type control adjustment. The unit is designed for “behind-the-panel” mounting in

switchgear or control boxes. All controls, inputs, outputs, and LED indicators are located on the unit’s

front panel for ease of installation and adjustment. The RA-70 Reference Adjuster also comes equipped

with a 0-1 mA output signal to operate a position indicator that will indicate the setpoint position.

The Reference Adjuster is completely compatible with the following Basler equipment:

• Shunt Static Exciter-Regulator (SSE), both for automatic and manual adjust functions

• SSR series of Voltage Regulators

• SR-A, SR-E, SR-H, and SR-F series of Voltage Regulators

• APR series of Voltage Regulators

• AVC63-12 and AVC125-10 Voltage Regulators

• MVC-112. MVC-236. and MVC-301 Manual Voltage Controls
October 15, 2026 BY
IN Beckhoff

Beckhoff ELM3002-0235 | EtherCAT Terminal, 2-channel analog input, voltage

The ELM3002-0235 EtherCAT Terminal of the basic series is designed

for high-voltage measurement on batteries and generators and

supports the measuring ranges ±60/360/600 and 1200 V.

The measuring range is selected in the CoE, as are the other setting

options such as the filter parameters. Irrespective of the signal

configuration, all ELM modules have the same technological properties.

The ELM3002-0235 with oversampling offers a maximum sampling

rate of 50.000 samples per second. The terminal is equipped with

4 mm lab jacks.

The individual calibration certificate for each device, in accordance

with ISO 17025 or DAkkS, depending on the device variant, can

be downloaded here. These calibration certificates are issued for

Beckhoff by an accredited service provider. Recalibration on request.

Extensive documentation is available from Beckhoff sales, support or

measurement@beckhoff.com.

This ELM3xxx series measurement terminal enables efficient

implementation of complex system-integrated data acquisition systems

(DAQ) that place high demands on measurement accuracy and time

synchronization.
October 15, 2026 BY
IN Beckhoff

Beckhoff ELM3002-0225 | EtherCAT Terminal, 2-channel analog input, voltage

The ELM3002-0225 EtherCAT Terminal of the basic series is designed

for high-voltage measurement on batteries and generators and

supports the measuring ranges ±60/360/600 and 1200 V.

The measuring range is selected in the CoE, as are the other setting

options such as the filter parameters. Irrespective of the signal

configuration, all ELM modules have the same technological properties.

The ELM3002-0225 with oversampling offers a maximum sampling rate

of 50.000 samples per second. The terminal is equipped with 4 mm lab

jacks.

The individual Beckhoff factory calibration certificate can be downloaded

via Beckhoff Service.

Extensive documentation is available from Beckhoff sales, support or

here for each device. Recalibration (ZS9001) is possible 

measurement@beckhoff.com.

This ELM3xxx series measurement terminal enables efficient implementation

of complex system-integrated data acquisition systems (DAQ) that place

high demands on measurement accuracy and time synchronization.
October 15, 2026 BY
IN Beckhoff

Beckhoff ELM3002-0205 | EtherCAT Terminal, 2-channel analog input, voltage

The ELM3002-0205 EtherCAT Terminal of the basic series is designed

for high-voltage measurement on batteries and generators and

supports the measuring ranges ±60/360/600 and 1200 V.

The measuring range is selected in the CoE, as are the other setting

options such as the filter parameters. Irrespective of the signal

configuration, all ELM modules have the same technological properties.

The ELM3002-0205 with oversampling offers a maximum sampling rate

of 50.000 samples per second. The terminal is equipped with 4 mm lab

jacks.

This terminal is also available as a variant with an individual calibration

certificate. (See related products) Extensive documentation is available

from Beckhoff sales, support or measurement@beckhoff.com.

This ELM3xxx series measurement terminal enables efficient

implementation of complex system-integrated data acquisition systems

(DAQ) that place high demands on measurement accuracy and time

synchronization.
October 15, 2026 BY
IN Beckhoff

Beckhoff ELM3002-0030 | EtherCAT Terminal, 2-channel analog input, voltage

The ELM300x EtherCAT Terminals are designed for flexible voltage m

easurement from 20 mV to 30 V in eleven measuring ranges.

The measuring range is selected in the CoE, as are the other setting

options such as the filter parameters. Irrespective of the signal

configuration, all ELM modules have the same technological properties.

The ELM300x modules for voltage measurement offer a maximum

sampling rate of 10.000 or 20.000 samples per second.

The 2-pin plug (push-in) can be removed for maintenance purposes

without releasing the individual wires.

The individual calibration certificate for each device, in accordance

with ISO 17025 or DAkkS, depending on the device variant, can

be downloaded here. These calibration certificates are issued for

Beckhoff by an accredited service provider. Recalibration on request.

Extensive documentation is available from Beckhoff sales, support or

measurement@beckhoff.com.

This ELM3xxx series measurement terminal enables efficient

implementation of complex system-integrated data acquisition systems

(DAQ) that place high demands on measurement accuracy and time

synchronization.
October 15, 2026 BY
IN Beckhoff

Beckhoff ELM3002-0000 | EtherCAT Terminal, 2-channel analog input, voltage

The ELM300x EtherCAT Terminals are designed for flexible voltage

measurement from 20 mV to 30 V in eleven measuring ranges.

The measuring range is selected in the CoE, as are the other setting

options such as the filter parameters. Irrespective of the signal

configuration, all ELM modules have the same technological properties.

The ELM300x modules for voltage measurement offer a maximum

sampling rate of 10.000 or 20.000 samples per second.

The 2-pin plug (push-in) can be removed for maintenance purposes

without releasing the individual wires.

This terminal is also available as a variant with an individual calibration

certificate. (See related products) Extensive documentation is available

from Beckhoff sales, support or measurement@beckhoff.com.

This ELM3xxx series measurement terminal enables efficient

implementation of complex system-integrated data acquisition systems

(DAQ) that place high demands on measurement accuracy and time

synchronization.
October 15, 2026 BY
IN Beckhoff

Beckhoff EL3783-0100 | EtherCAT Terminal, 3-channel analog input, multi-function

The EL3783-0100 EtherCAT Terminal is a power monitoring I/O terminal

used for state monitoring of a 3-phase AC voltage system.

For each phase, voltage up to 400/690 Vrms and current up to 1 Arms/5

Arms are sampled as instantaneous values with a resolution of 16 bits.

The six channels are measured simultaneously based on the EtherCAT

oversampling principle with a temporal resolution of up to 50 µs and then

passed on to the control system. With the processing power available

there and in combination with theTwinCAT Function TF3650. true RMS

or power calculations as well as complex user-specific algorithms can be

calculated via the voltage and current characteristics.

Through the oversampling principle, the terminal is able to measure at

significantly shorterintervals than the cycle time of the control system.

AC and DC parameters must be connected and measured with a common

reference potential.

Through the feature “ExtendedRange”, the user has the full technical

measuring range available at up to 130% of the specified nominal measuring

range. The EL3783-0100 supports distributed clocks and can therefore

measure synchronously with other EtherCAT devices. In combination with

EL6688 it can be synchronized via IEEE 1588 to external clocks.

The terminal can also be operated without distributed clocks.

The adapted voltage measuring range to 130 V is optimally suited for

connecting medium voltage transformers, for example.

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