ABB 216EA61B Analogue Input Unit for Generator Protection

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The ABB 216EA61B Analogue Input Unit for Generator Protection is a 24-channel A/D conversion module for the REG216 generator protection system. It receives stepped-down ±40 V signals from the 216GW61 input transformer, digitizes them with an on-board 80C186 processor, and transmits data over the B448C parallel bus. Powered by 24 V DC, it features 128 kB EPROM, 64 kB RAM, 8 kB EEPROM, built-in reference-voltage and self-test diagnostics. Manufactured in Sweden.

Tags: ABB 216BM61B HESG448267R1021, ABB DPW03, ABB DPW03 Power Supply, DPW 03, DPW 03 Actuator, DPW03, DPW03 Industrial

SKU: 7559732-1-1-1-1-1-1-1-1-1-1-1-1-1-1-1-1-1-1-1-1-1-1-1-2-1-1-1-1-1-1-1-1-1-1-1-1-1-1-1-1-1-1-1-1-1-1-1

The ABB 216EA61B Analogue Input Unit for Generator Protection is a precision A/D conversion module built for the REG216 / REC216 digital generator protection system. It receives stepped-down current and voltage signals from the 216GW61 input transformer module, digitizes them on-board, and forwards the measured values to the processing unit over the B448C parallel bus.

Key Features

24 analog input channels, split across two D-sub connectors (a: CH01–CH12, b: CH13–CH24)
Input range ±40 V, fed from the 216GW61 / 216GW62 input transformer
On-board 80C186 processor for signal pre-processing
Local memory: 128 kB EPROM (program), 64 kB RAM, 8 kB EEPROM (data)
Up to two input transformer modules (216GW61) per 216EA61B
Self-monitoring: reference voltage check, analog section supply watch, RAM/ROM test
Plug-in module, 2 standard divisions (2T) wide, for 216MB66 equipment rack

Technical Specifications

Item	Detail
Type Designation	216EA61B
Order Code	HESG448230R1/G
Function	Analog input / A/D converter
Analog Inputs	24 channels (CH01…CH24)
Input Signal Range	-40 V … +40 V (from 216GW61 transformer)
Connectors	“a” upper = CH01–CH12; “b” lower = CH13–CH24
On-board Processor	80C186
Program Memory	128 kB EPROM
Main Memory	64 kB RAM
Data Memory	8 kB EEPROM
Bus Interface	64 kB DPM/RAM, B448C parallel bus
Auxiliary Supply	24 V DC (from station battery via 216NG61/62/63)
Internal Voltage	5 V DC (derived from 24 V)
Width	2 T (standard divisions, plug-in)
Compatible Transformers	Up to 2× 216GW61 per unit
Origin	Sweden

Installation Notes

Insert the 216EA61B into rack divisions 8–9 or 10–11 on the 216MB66 rack; the B448C bus connector engages at the rear.
Connect the analog signal cables from the 216GW61 input transformer module to connectors “a” and “b” — do not wire CT/PT secondary circuits directly to this unit.
Verify the 24 V auxiliary supply LED is lit; internal 5 V generation is automatic.
Channel assignment and scaling are configured via the portable HMI on the 216VC62a processor, not via on-board switches.
On ALARM, check for VREF (reference voltage out of tolerance), ASE (analog section supply failure), or RAM/ROM error in the device status register.

Common Questions

How many analog signals can one 216EA61B measure? The unit has 24 A/D channels, but the usable measurement count depends on the number of 216GW61 input transformer modules connected: one transformer yields 12 signals, two yield 24.

Can I connect 4–20 mA field signals directly? No. This module sits behind the 216GW61 input transformer, which steps down primary CT/PT signals to ±40 V level. It is not a general-purpose 4–20 mA PLC analog input card.

What happens if the reference voltage drifts? The unit flags a VREF status bit (0400 Hex) and raises an ALARM; the protection system treats the affected analog channel as invalid until the fault is cleared.

ABB 216EA61B Analogue Input Unit for Generator Protection