22.2.7 Binary input module (BIM)
IP14535-1 v1
22.2.7.1 Introduction
M1769-3 v4
The binary input module has 16 optically isolated inputs and is available in two versions, one
standard and one with enhanced pulse counting capabilities on the inputs to be used with the
pulse counter function. The binary inputs are freely programmable and can be used for the input
of logical signals to any of the functions. They can also be included in the disturbance recording
and event-recording functions. This enables extensive monitoring and evaluation of operation of
the IED and for all associated electrical circuits.
22.2.7.2 Design
M11586-3 v6
The Binary input module contains 16 optical isolated binary inputs. The voltage level of the binary
input is selected at order.
For configuration of the input signals, refer to section
"Signal matrix for binary inputs SMBI".
A signal discriminator detects and blocks oscillating signals. When blocked, a hysteresis function
may be set to release the input at a chosen frequency, making it possible to use the input for pulse
counting. The blocking frequency may also be set.
Well defined input high and input low voltages ensure normal operation at battery supply ground
faults, see figure
649 The figure shows the typical operating characteristics of the binary inputs of
the four voltage levels.
The standard version of binary inputs gives an improved capability to withstand disturbances and
should generally be used when pulse counting is not required. Inputs are debounced by software.
I/O events are time stamped locally on each module for minimum time deviance and stored by the
event recorder if present.
Section 22 1MRK 502 066-UUS B
IED hardware
1288
Technical manual
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