ero electronic MKC, User Manual, Page: 21 / 141

17
F) SERIAL INTERFACE
RS-485 interface allows you to connect up to 30 devices with
one remote master unit.
Fig. 17 - RS-485 WIRING
NOTES :
1) The cable length must not exceed 1.5 km at 9600 BAUD.
2) This serial interface is isolated.
3) The following report describes the signal sense of the voltage
appearing across the interconnection cable 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.
21
20
COMMON
22
B'/B
B/B'
A/A'
A'/A
M
A
S
T
E
R
I
N
S
T
R
U
M
E
N
T
Fig. 16.B OUTPUT 6 WIRING
NOTE :
1) Do not run analog output wirings together with AC power
cables.
2) Out 5 and 6 are isolated outputs.
3) The maximum load is equal to 600
W
.
Shield
_
+
19
18
OUT 6
20 mA
+
_
+
_
G
18
19
OUT 6
20 mA
+
_
Xkc-1-C0.P65 5/29/02, 11:59 AM 17