JVL MAC050 - Page 347

JVL A/S - User Manual - Integrated Servo Motors MAC050 - 4500 343
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.
7Master 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.
Central
Controller
(for example a PC)
MAC50-141
Motor
RS485 network with 2 x MAC140 and 1 x MAC800
mounted with MAC00-R1, R3 or R4 modules.
MAC50-141
Motor
MAC800
Motor
Power supply
A
A
A
A
P+
P+
P+
B
B
B
B
P-
P-
P-
RS485
Interface
Screen connected
to GND in each end
Opto isolation *
**
**
** 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.
Make sure that all
involved units are
connected to the same
potential
RS485
Interface
RS485
Interface
Up to 32
Motors
Power
Supply
Power
Supply
Power
Supply
Mains 230VAC
Control voltage
Only MAC50-141
with R1, R3 or R4
Control voltage
Only MAC50-141 with
R1, R3 or R4
GND
GND
+12-32VDC
(control voltage) +12-48VDC (Bus voltage)
GND
GND
GND
O+
O+
Main supply
ScreenScreen Screen
Max. 32VDC !
* Opto isolation is recommended.
*** Each unit connected must be setup with an address via The MacTalk program.
If only one unit is connected no address is needed.
*** Address=1
*** Address=2
*** Address=3
TT1532-01GB