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3.1.4 Binary Input and Output Module
There are four types of binary input and output module (IO module): These modules are fitted
according to the model (see Section 3.1.1).
3.1.4.1 IO1 and IO8 Module
IO1 and IO8 provide a DC/DC converter, binary inputs and binary outputs for tripping.
As shown in Figure 3.1.4.1, the IO1 module incorporates a DC/DC converter, 15 photo-coupler
circuits (BI) for binary input signals and 6 auxiliary relays (TP1 to 5) dedicated to the circuit
breaker tripping command.
As shown in Figure 3.1.4.2, the IO8 module incorporates a DC/DC converter, 12 photo-coupler
circuits (BI) for binary input signals and 3 auxiliary relays (TP) dedicated to the circuit breaker
tripping command. The 12 binary inputs have dedicated positive and negative inputs suitable for
double-pole switching.
The nominal input voltage rating of the DC/DC converter is 24V, 48V, 110V/125V or
220V/250V. The normal range of input voltage is −20% to +20%.
The five or three tripping command auxiliary relays are the high-speed operation type and have
one normally open output contact.
A
uxiliary relay
(high speed)
-
DC/DC
converter
FG
(−)
(+)
BI
Photo-coupler
Tripping
command
Binary
input
signals
Line filter
DC
supply
TP-5
TP-4
TP-3
TP-2
TP-1
BI
BI
BI
BI
(
×
15)
Figure 3.1.4.1 IO1 Module