20.2.9
Binary input/output module (IOM)
IP15582-1 v1
20.2.9.1
Introduction
M6939-3 v6
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.
20.2.9.2
Design
IP10635-1 v2
M1718-3 v4
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
. Inputs are debounced by software.
Well defined input high and input low voltages ensures normal operation at battery
supply earth faults, see figure
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.
M1898-3 v3
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
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
"Signal matrix for binary outputs SMBO"
.
The making capacity of the reed relays are limited.
Section 20
1MRK 506 382-UEN A
IED hardware
854
Line distance protection REL650 2.2 IEC
Technical manual
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