6.-
RS-485 COMMUNICATIONS
The
DHC-96
devices have one
RS-485
communications port,with communications protocols:
MODBUS
RTU ®
.
6�1�- CONNECTIONS
The
RS-485
cable must be wired with twisted pair cable with mesh shield, with a maximum distance
between the
DHC-96
and the master device of 1200 metres.
A maximum of 32
DHC-96
devices can be connected to this bus.
Use an intelligent
RS-232
to
RS-485
network protocol converter to establish the communications
with the master device.
14
70 59
71
1
2
11
72
58
28 29 31 32
16
15
B
A
RS-485
14
70 59
71
1
2
11
72
58
28 29 31 32
16
15
B A
RS-485
B(-)
A(+)
RS-232 / USB / Ethernet / Profibus ...
PC
RS-485
RS-485
RS-232
USB
Ethernet
Profibus
...
Figure 21: RS-485 Connection diagram�
Note:
Default values of the RS-485 communication :
19200 bps
,
No parity
,
8 data bits
and
1 stop bit.
34
DHC-96 mAdc, DHC-96 Adc
Instruction Manual
Summary of Contents for DHC-96 Adc
Page 1: ...INSTRUCTION MANUAL M227B01 03 22A DC Ammeter DHC 96 mAdc DHC 96 Adc...
Page 2: ...2 DHC 96 mAdc DHC 96 Adc Instruction Manual...
Page 44: ...10 CE CERTIFICATE 44 DHC 96 mAdc DHC 96 Adc Instruction Manual...
Page 45: ...45 Instruction Manual DHC 96 mAdc DHC 96 Adc...
Page 46: ...46 DHC 96 mAdc DHC 96 Adc Instruction Manual...
