ABB REF615C_D Feeder protection and control relay

Description

REF615C_D A network of resistors and capacitors establishes input thresholds and provides input filtering.

Optoisolators provide isolation between the field inputs and the module’s logic components. Data

from all 16 inputs is placed into a data buffer. The module’s circuit LEDs show the current states of

the 16 inputs in this data buffer.

REF615C_D Parallel-to-serial converters change input data from the data buffer into the serial format needed by

the Bus Interface Unit.

After checking the Board ID and verifying that the module is receiving appropriate logic power

from the Bus Interface Unit (which is reflected by the state of the module’s Power LED), the Bus

Interface Unit then reads the filtered, REF615C_D converted input data

The Terminal Block with box terminals has 25 terminals for each module, each of which

accommodates one AWG #14 (avg 2.1mm2 cross section) to AWG #22 (avg 0.36mm2 cross

section) wire, or two wires up to AWG #18 (avg. 0.86mm2 cross section). When an external jumper

is used, the wire capacity is reduced from AWG #14 (2.10mm2 ) to AWG #16 (1.32mm2 ).

The I/O Terminal Block with barrier terminals has 18 terminals per module. Each terminal can

accommodate one or two wires up to AWG #14 (avg 2.1mm2 cross section).

REF615C_D The I/O Terminal Block with Connectors has one 20-pin male connector per module. The mating

connector is Amp part number 178289-8. Any tin-plated contact in the AMP D-3000 series can be

used with the connector (Amp part number 1-175217-5 for high contact force receptacle for 20-24

gauge (0.20-0.56mm2 ) wires), 1-175218-5 for high contact force receptacle for 16-20 gauge (0.56-

1.42mm2 )).

If the module is installed on an I/O Terminal Block with Barrier Terminals, an Auxiliary Terminal

Block can be used to provide additional wiring terminals. For the I/O Terminal Block with Wire to

Board Connectors, external connection points are usually be preferred, although an Auxiliary

Terminal Block can be used.

Auxiliary Terminal Blocks have all terminals connected together internally. The Auxiliary

Terminal Block with box terminals has 13 terminals, each of which accommodates one AWG #14

(avg 2.1mm2 cross section) to AWG #22 (avg 0.36mm2 cross section) wire, or two wires up to

AWG #18 (avg. 0.86mm2 cross section). The Auxiliary Terminal Block with barrier terminals has

nine terminals, each of which can accommodate one or two wires up to AWG #14 (avg 2.1mm2

cross section).

The following illustration shows how an optional Auxiliary Terminal Block with Box Terminals

can be used for power connections when installing this module on an I/O Terminal Block with Box

Terminals.

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