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Binary I/O capabilities Chapter 10
Hardware modules
4 Binary I/O capabilities
4.1 Application
Input channels with high EMI immunity can be used as binary input signals to any function. Sig-
nals can also be used in disturbance or event recording. This enables extensive monitoring and
evaluation of the operation of the terminal and associated electrical circuits.
4.2 Design
Inputs are designed to allow oxide burn-off from connected contacts, and increase the distur-
bance immunity during normal protection operate times. This is achieved with a high peak in-
rush current while having a low steady-state current. Inputs are debounced by software.
Well defined input high and input low voltages ensures normal operation at battery supply earth
faults.
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.
4.3 Technical data
Table 162: IOM, PSM - Binary inputs
Table 163: IOM, PSM - Binary outputs
Inputs RL24 RL48 RL110 RL220
Binary inputs IOM: 8, PSM: 4
Debounce frequency 1 Hz (IOM)
Oscillating signal discriminator. Blocking and release settable between 1-40 Hz
Binary input voltage RL 24/30 VDC
+/-20%
48/60 VDC
+/-20%
110/125 VDC
+/-20%
220/250 VDC
+/-20%
Power dissipation (max.) 0.05 W/input 0.1 W/input 0.2 W/input 0.4 W/input
Function or quantity Trip and Signal relays Fast signal relays
Binary outputs IOM: 10, PSM: 4 IOM: 2
Max system voltage 250 V AC, DC 250 V AC, DC
Test voltage across open contact, 1 min 1000 V rms 800 V DC
Current carrying capacity Continuous 8 A 8 A
1 s 10 A 10 A
Making capacity at
inductive load with
L/R>10 ms
0.2 s 30 A 0.4 A
1.0 s 10 A 0.4 A
Breaking capacity for AC, cos ϕ>0.4 250 V/8.0 A 250 V/8.0 A
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