Binary Input/Output Module (Iom); Introduction; Design - ABB RED650 Technical Manual

Section 22
IED hardware
22.2.9
22.2.9.1
22.2.9.2
832

Binary input/output module (IOM)

Introduction

The binary input/output module is used when only a few input and output channels
are needed. The ten standard output channels are used for trip output or any
signaling purpose. The two high speed signal output channels are used for
applications where short operating time is essential. Eight optically isolated binary
inputs cater for required binary input information.

Design

The binary input/output module is available in two basic versions, one with
unprotected contacts and one with MOV (Metal Oxide Varistor) protected contacts.
Inputs are designed to allow oxide burn-off from connected contacts, and increase
the disturbance immunity during normal protection operate times. This is achieved
with a high peak inrush current while having a low steady-state current, see figure
378. Inputs are debounced by software.
Well defined input high and input low voltages ensures normal operation at battery
supply earth faults, see figure 377.
The voltage level of the inputs is selected when ordering. Alternative connectors of
Ring lug or Compression type can be ordered.
I/O events are time stamped locally on each module for minimum time deviance
and stored by the event recorder if present.
The binary I/O module, IOM, has eight optically isolated inputs and ten output
relays. One of the outputs has a change-over contact. The nine remaining output
contacts are connected in two groups. One group has five contacts with a common
and the other group has four contacts with a common, to be used as single-output
channels, see figure 383.
The binary I/O module also has two high speed output channels where a reed relay
is connected in parallel to the standard output relay.
For configuration of the input and output signals, refer to sections
for binary inputs SMBI"
The making capacity of the reed relays are limited.
and "Signal matrix for binary outputs
1MRK 505 394-UEN A
"Signal matrix
SMBO".
Line differential protection RED650 2.2 IEC
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