48
E300 Installation and Commissioning Guide
Issue Number: 1
Size 7
On size 7, the supply and motor ground connections are made using the
M8 studs located by the supply and motor connection terminals.
Size 8 to 10
On size 8 to 10, the supply and motor ground connections are made
using the M10 studs located by the supply and motor connection
terminals.
Figure 4-9 Size 7 to 10 ground connections
1. Ground connection studs.
Table 4-2 Protective ground cable ratings
4.4 Communications connections
The drive offers a 2 wire 485 interface. This enables the drive set-up,
operation and monitoring to be carried out with a PC or controller if
required.
Figure 4-10 Location of the comms connectors
The 485 option provides two parallel RJ45 connectors are provided
allowing easy daisy chaining. The drive only supports MODBUS RTU
protocol. See Table 4-3 for the connection details.
Standard Ethernet cables are not recommended for use when
connecting drives on a 485 network as they do not have the correct
twisted pairs for the pinout of the serial comms port.
Table 4-3 Serial communication port pin-outs
Minimum number of connections are 2, 3, 7 and shield.
The TX Enable is a 0 to +5 V output signal from the drive, which can be
used to control the buffers on an external serial communications device /
converter.
4.4.1 Isolation of the 485 serial communications
port
The serial PC communications port is double insulated and meets the
requirements for SELV in EN 50178:1998.
An isolated serial communications lead has been designed to connect
the drive to IT equipment (such as laptop computers), and is available
from the supplier of the drive. See below for details.
The ground loop impedance must conform to the
requirements of local safety regulations.
The drive must be grounded by a connection capable of
carrying the prospective fault current until the protective
device (fuse, etc.) disconnects the AC supply.
The ground connections must be inspected and tested at
appropriate intervals.
Input phase
conductor size
Minimum ground conductor size
≤
10 mm
2
Either 10 mm
2
or two conductors of the
same cross-sectional area as the input
phase conductor (an additional ground
connection is provided on sizes 3, 4 and 5
for this purpose).
> 10 mm
2
and
≤
16 mm
2
The same cross-sectional area as the input
phase conductor
> 16 mm
2
and
≤
35 mm
2
16 mm
2
> 35 mm
2
Half of the cross-sectional area of the input
phase conductor
1
1
8
9E
7
8
10
WARNING
Pin
Function
1
120
Ω
Termination resistor
2
RX TX (Receive / transmit line - positive)
3
Isolated 0 V
4
+24 V (100 mA)
5
Isolated 0 V
6
TX enable
7
RX\ TX\ (Receive / transmit line - negative)
8
RX\ TX\ (if termination resistors are required, link to pin 1)
Shell
Isolated 0 V
In order to meet the requirements for SELV in IEC60950 (IT
equipment) it is necessary for the control computer to be
grounded. Alternatively, when a lap-top or similar device is
used which has no provision for grounding, an isolation
device must be incorporated in the communications lead.
1
1
8
8
NOTE
NOTE
WARNING
Summary of Contents for E300 Series
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