REI-77-E-220 Digital Indicator – Electronic Display

Digital control for economic series applications

Supply Voltage: 220V AC (24V option available)
Output Type: None – Display only
Measurement Type: 0-10V, 4-20mA (0-20mA)
Dimensions: 72×72 mm (Panel cutout dimensions available in the diagram)

> This model is an obsolete series kept in stock only for backup purposes. For new projects, newer recommended products should be considered.

It is a general-purpose electronic display unit designed to monitor and calibrate analog signals. Supported signals include:
- Compatible with universal 4-20mA or 0-10V sensors
- Adjustable display scale for sensor values
- Selectable decimal point resolution
- LED Display with special icons (12mm, 4 digits)
- IP65 front panel protection against dust and water
- Fixed terminal block installation
- Mounted with snap-fit panel clamps

* (0-10V) >> Commonly used for analog outputs of speed controllers. Measures all 0-10V DC signals. Can be directly connected to inverter potentiometers.
* (0-1V) >> Usable for load-cell and humidity display. Suitable for reading very low voltage levels.
* (0-20mA) >> Accepts analog output from inverters and other sensors.
* (4-20mA) >> Supports standard current input reading.

In all machine applications, parameters such as speed, current, or torque from AC drive analog outputs can be displayed. Not all inverter panels can be externally accessed.

All models support standard screen calibration. Additionally:

Optional Features:
- 3, 4, or 6 digit displays or LCD variants
- Decimal point display options
- Memory function for min/max value tracking

Depending on model:
- Calibrated analog output (0-10V)
- RS485 Modbus communication (optional)
- Programmable relay output
- Built-in power supply for sensor feed
- Dual mode (two analog inputs)
- Direct PC connectivity
- USB data logging
- LCD customization (bar, rpm, etc.)

Other Sizes:
- 24V AC/DC version: DEIP-37-R-B
- Smaller size: DEIP-44-R-A (48×48)
- Larger size: DEIP-77-R-A (72×72)
- Dual display & relay models: See DGI series

Note: These devices are for monitoring only in speed control applications – not for adjustment.

Editor's Note: Dear colleagues, this model is now discontinued and has been replaced with higher resolution DEIP series products. If you're designing a new panel, we highly recommend reviewing the DGI and DEIP series. Previous user complaints about hard buttons and fragile casings have been addressed. The display was upgraded to 4-digit resolution, and the appearance was enhanced with a more aesthetic front panel and hidden PCB layout. (personal opinion)

Attention! All installation procedures of the DERELL REI series must be performed only by qualified technical personnel. Installations must comply with all applicable laws and directives (e.g. 2006/42/EC). DERELL Electronics and Otomasyon AVM assume no responsibility for improper or non-compliant installations. Warranty may be void if manufacturer guidelines are not followed. Please refer to the user manual for complete installation and safety instructions. For support, contact: support@otomasyonavm.com