22.2.10 Binary input/output module (IOM)
IP15582-1 v1
22.2.10.1 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.
22.2.10.2 Design
IP10635-1 v1
M1718-3 v3
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 trip times. This is achieved with a high peak
inrush current while having a low steady-state current, see figure
650. Inputs are debounced by
software.
Well defined input high and input low voltages ensures normal operation at battery supply ground
faults, see figure
649.
The voltage level of the inputs is selected when ordering.
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
657.
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 inputs
SMBI" and "Signal matrix for binary outputs SMBO".
The making capacity of the reed relays are limited.
1MRK 502 066-UUS B Section 22
IED hardware
1307
Technical manual
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