JVL MAC050 User Manual page 347

5.11 Expansion Module MAC00-R1/R3/R4
5.11.38 RS485 - General description when using a MAC00-Rx module
The RS485 offers more noise-
immune communication com-
pared to the RS232 interface.
Up to 32 motors can be con-
nected to the same line.
When connecting the RS485
interface to a central control-
ler, the following rules must
be followed:
1 Use twisted-pair cable
2 Use screened cable
3 Ensure that GND is also
connected in order to as-
sure the same potential
between all the connect-
ed nodes.
4 Ensure that all units have a
proper connection to
safety ground (earth) in
order to refer to the same
potential.
5 The last unit in each end
of the network must be
terminated. Use a termi-
nation resistor in the
range 120-220 Ohm be-
tween line A and B.
6 Ensure that the supply
lines are connected indi-
vidually in order to mini-
mise the voltage drop
between the motors.
7 Master Controller RS485
interface:
If available, it is strongly
recommended a type
with optical isolation is
used.
Connectors:
Please read the individual
description for the
MAC00-R1, R3 or R4 to
see the connector layout.
JVL A/S - User Manual - Integrated Servo Motors MAC050 - 4500
RS485 network with 2 x MAC140 and 1 x MAC800
mounted with MAC00-R1, R3 or R4 modules.
Central
Make sure that all
involved units are
Controller
connected to the same
(for example a PC)
potential
Opto isolation *
**
Screen connected
to GND in each end
MAC50-141
A
B
GND
Power
Supply
Control voltage
Only MAC50-141
with R1, R3 or R4
MAC50-141
A
B
GND
Power
Supply
Control voltage
Only MAC50-141 with
R1, R3 or R4
MAC800
**
A
B
GND
Power
Supply
Main supply
Up to 32
Motors
* Opto isolation is recommended.
** The last unit at each end of the line must be terminated. Please connect a terminating
resistor in the range 12 0 to 220 Ohm between the A and B lines.
*** Each unit connected must be setup with an address via The MacTalk program.
If only one unit is connected no address is needed.
Power supply
Motor
*** Address=1
RS485
Interface
P+
P-
O+
Motor
*** Address=2
RS485
Interface
P+
P-
O+
Motor
*** Address=3
RS485
Interface
P+
Max. 32VDC !
P-
Mains 230VAC
TT1532-01GB
343