Serial Interface; Power Supply - SIKA K85 Engineering Manual

SSR
_
+
SSR
13 14 15 16
NOTE: This output is not isolated. A double or reinforced
isolation between instrument output and power supply
must be assured by the external solid state relay.
b) OUT 2
Relay
20 21 22 23
C NO
SSR
_
+
SSR
20 21 22 23
NOTE: This output is not isolated. A double or reinforced
isolation between instrument output and power supply
must be assured by the external solid state relay.
b) OUT 3
Relay
Out 3 contact rating:
C 18
N0
19
Operation: 1 x 10
SSR
Logic level 0:
+
18
SSR
Logic level 1:
_
19
NOTE: This output is not isolated. A double or reinforced
isolation between instrument output and power supply
must be assured by the external solid state relay.

2.11 SERIAL INTERFACE

A/A'
B/B'
C/C'
Logic level 0:
Vout < 0.5 V DC.
Logic level 1:
17
12 V ± 20% @ 1 mA
10 V ± 20% @ 20 mA.
Out 2 contact rating:
- 8 A /250 V cosφ =1.
- 3 A /250 V cosφ =0.4.
24
Operation: 1 x 10
NC
Logic level 0:
Vout < 0.5 V DC.
Logic level 1:
24 12 V ± 20% @ 1 mA.
10 V ± 20% @ 20 mA.
- 5 A /250 V cosφ =1
- 2 A /250 V cosφ =0,4
5
Vout < 0.5 V DC.
12 V ± 20% @ 1 mA.
10 V ± 20% @ 20 mA.
7
8 B/B'
9
7
8 B/B'
9
SIKA - K series - ENGINEERING MANUAL -V0.7 PAGE 3
Interface type:
Voltage levels: according to EIA standard
Protocol type: MODBUS RTU.
Byte format: 8 bit without parity
Stop bit: one.
Baud rate: programmable from 1200 to 38400 baud
Address: programmable from 1 to 255
NOTES:
1) RS-485 interface allows to connect up to 30 devices
with one remote master unit.
2) The cable length must not exceed 1.5 km at 9600
BAUD.
3) Follows the description of the signal sense of the
voltage appearing across the interconnection cable
.
5
as defined by EIA for RS-485.
a) The " A " terminal of the generator shall be
negative with respect to the " B " terminal for a
binary 1 (MARK or OFF) state.
b) The " A " terminal of the generator shall be
positive with respect to the " B " terminal for a
binary 0 (SPACE or ON).

2.12 POWER SUPPLY

1
Supply
2
3
NOTES:
1) Before connecting the instrument to the power line,
make sure that line voltage is equal to the voltage
shown on the identification label.
2) To avoid electrical shock, connect power line at the
end of the wiring procedure.
3) For supply connections use No 16 AWG or larger
wires rated for at last 75 °C.
4) Use copper conductors only.
5) For power supply the polarity is a do not care
condition.
6) The power supply input is NOT fuse protected.
Please, provide a T type 1A, 250 V fuse externally.
A/A'
GND
A/A'
- Isolated (50 V) RS 485
- Not isolated TTL
Power consumption: 5 W max.
Supply voltage:
- 100 to 240 V AC/DC (+ 10%)
- 24 V AC/DC (+ 10%)