FUNCTION CHARACTERISTICS
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NA011 - Manual - 05 - 2022
4 F U N C T I O N C H A R A C T E R I S T I C S
4 F U N C T I O N C H A R A C T E R I S T I C S
4.1 HARDWARE DESCRIPTION
The following figure illustrates the basic structure of the relay.
Printed boards hold the circuit components arranged according to a modular allocation of the main
functions.
Power supply board
All the components necessary for conversion and stabilization functions are provided.
Input range: 24...230 V.
The circuit provides stabilized voltages of +5 V and -5 V, required for the analogue measurement and
+3.3 V for supplying the digital circuits.
The circuit board additionally comprises:
INPUT CIRCUITS:
• Three binary input circuits,
The logical input circuits and the block circuits include photo-couplers which provide for galvanic
separation.
OUTPUT CIRCUITS:
• Four output relays (K1...K4).
hw.ai
RTC
CPU BOARD
POWER SUPPLY BOARD
INPUT MODULE
CTs
DSP
1A/5A
≈
≈
≈
≈
EEprom
RS485
RELAYS
K1...K4
Output contacts
RS232
MMI
LCD
LEDs
BINARY INPUTS
IN1
Input
IN2
IN3
POWER SUPPLY
+5 V
+10 V
0 V
+24 V
-10 V
POWER F
AIL
RESET
Uaux
≈
≈
≈
LPCT
s CURRENT INPUTS
I
L1
I
L2
I
L3
L1
L2
Setting
LPCT
800 A
400 A
200 A
100 A
50 A
L3
In=50...1250A