Ascon Tecnologic - K__V - Indicators - ENGINEERING MANUAL - PAG. 4
3.3.3 Output 3 (OP3)
Relay Output
K31
K38
C NO
9
K48
10
K85
C NO
17 18
C NO
18 19
Out 3 contact rating:
• 8 A /250 V cosj =1;
• 3 A /250 V cosj =0.4.
Operation:
1 x 105.
SSR Output
K31
K38
+ -
9
K48
10
K85
+ -
17 18
+ -
18 19
Logic level
0:
Vout < 0.5 VDC;
Logic level
1:
12 V ± 20% @ 1 mA;
10 V ± 20% @ 20 mA.
3.3.4 Output 4 (OP4)
Relay Output
K31
C NO
15 16
Out 1 contact rating:
• 8 A /250 V cos
j
=1;
• 3 A /250 V cos
j
=0.4.
Operation:
1 x 10
5
.
SSR Output
K31
+ -
15 16
Logic level 0:
Vout < 0.5 VDC;
Logic level 1:
12 V ± 20% @ 1 mA;
10 V ± 20% @ 20 mA.
3.4 Logic Inputs
Safety notes:
–
Do not run logic input wiring together with power cables.
–
Use an external dry contact capable to switch 0.5 mA,
5 VDC.
–
The instrument needs 150 ms to recognize a contact sta-
tus variation.
–
The logic inputs are
NOT
isolated by the measuring input.
A double or reinforced isolation between logic inputs and
power line must be assured by the external element.
5
K31
6 7
6
K38
7
8
K48
K85
6 7
8
DI1 DI2 DI1DI2
DI1
DI2
3.5 Serial Interface
10
8
9
A/A’
B/B’
GND
Master
A/A’
B/B’
C/C’
7
8
9
A/A’
B/B’
GND
K31
K85
Interface type:
- Isolated (50 V) RS-485;
- TTL not isolated;
Voltage levels:
According to EIA standard;
Protocol type:
MODBUS RTU;
Byte format:
8 bit without parity;
Stop bit:
One;
Baud rate:
Programmable: 1200... 38400 baud;
Address:
Programmable: 1... 255.
Notes: 1.
RS-485 interface allows to connect up to 30 devi-
ces with one remote master unit.
2.
The cable length must not exceed 1.5 km at
9600 baud.
