Serial communications, Serial communications -17, Converter – CONTREX MLP-Trim User Manual
Page 33: The national electrical code, The canadian electrical code, Operations: serial communications, Isolated, Figure 2-19 mlp–trim multidrop installation
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Figure 2-19 MLP–Trim Multidrop Installation
SERIAL COMMUNICATIONS
NOTE: The installation of this motor control must conform to area and local electrical
codes. See
The National Electrical Code
(NEC,) Article 430 published by the
National Fire Protection Association, or
The Canadian Electrical Code
(CEC).
Use local codes as applicable.
The Serial Communications interface on the MLP–Trim complies with EIA Standard
RS–485-A for balanced line transmissions. This interface allows the host computer to
perform remote computer parameter entry, status or performance monitoring, and
remote control of the MLP–Trim. See
Operations: Serial Communications,
for
information on using Serial Communications. The MLP-Trim is designed to use with an
isolated RS232 to RS485 converter.
Figure 2-19 illustrates a multidrop installation of the Serial Communications link and
Figure 2-20 illustrates the Serial Communications connections.
RS232 to RS485
Converter
Isolated
Contre
x
CODE
SELECT
SET
POINT
TACH
7
8
9
4
5
6
1
2
3
0
–
.
ENTER
CLEAR
Contre
x
CODE
SELECT
SET
POINT
TACH
7
8
9
4
5
6
1
2
3
0
–
.
ENTER
CLEAR
Contre
x
CODE
SELECT
SET
POINT
TACH
7
8
9
4
5
6
1
2
3
0
–
.
ENTER
CLEAR
Contre
x
CODE
SELECT
SET
POINT
TACH
7
8
9
4
5
6
1
2
3
0
–
.
ENTER
CLEAR
Contre
x
CODE
SELECT
SET
POINT
TACH
7
8
9
4
5
6
1
2
3
0
–
.
ENTER
CLEAR
Contre
x
CODE
SELECT
SET
POINT
TACH
7
8
9
4
5
6
1
2
3
0
–
.
ENTER
CLEAR