Control Connections - Nidec Unidrive M200 User Manual

Safety Product Mechanical
information information installation
4.2.2 Isolation of the EIA 485 serial communication
port
The serial communication port is single insulated and meets the
requirements for ELV.
When using the communications port with a personal
computer or centralised controller e.g. PLC, an isolation
device must be included with a rated voltage at least equal
to the drive supply voltage. Ensure that the correct fuses are
WARNING
installed at the drive input, and that the drive is connected to
the correct supply voltage.
If a serial communications converter other than the CT
Comms cable is used to connect to other circuits classified
as Safety Extra Low Voltage (SELV) (e.g. to a personal
computer), then a safety isolating barrier must be included to
maintain the SELV classification.
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:
Table 4-3 Isolated serial comms lead details
Part number
4500-0096
The "isolated serial communications" lead has reinforced insulation as
defined in IEC60950 for altitudes up to 3,000 m.
4.3

Control connections

4.3.1 General
Table 4-4 The control connections consist of:
Function Qty
Single ended analog Mode, offset, invert, scaling,
2
input destination
Analog output 1 Source, mode, scaling,
Digital input 5 Destination, invert
Input / output mode select,
Digital input / output 1
destination / source, invert
Maximum reference, input
Frequency input 1
limit, scaling, destination
PWM or frequency Source, scaling, maximum
1
output output frequency, mode
Mode, type, trip threshold,
Motor thermistor input 1
reset threshold
Relay 1 Source, invert
Drive enable 1
+10 V User output 1
+24 V User output 1
0V common 1
Key:
Indicates the parameter which is being controlled
Destination parameter:
by the terminal / function
Indicates the parameter being output by the
Source parameter:
terminal
Analog - indicates the mode of operation of the
terminal, i.e. voltage 0-10 V, current 4-20 mA etc.
Mode parameter: Digital - indicates the mode of operation of the
terminal, (the Drive Enable terminal is fixed in
positive logic).
All analog terminal functions can be programmed in menu 7.
All digital terminal functions (including the relay) can be programmed in
menu 8.
20
Electrical Getting Basic
installation started parameters
Description
CT USB Comms cable
Control parameters Terminal
available number
2, 5
7
5, 11, 12,
13, 14
10
14
10
14
41, 42
11
4
9
1
Running the NV Media
Optimization
motor Card
The control circuits are isolated from the power circuits in the
drive by basic insulation (single insulation) only. The installer
must ensure that the external control circuits are insulated
from human contact by at least one layer of insulation
(supplementary insulation) rated for use at the AC supply
WARNING
voltage.
If the control circuits are to be connected to other circuits
classified as Safety Extra Low Voltage (SELV) (e.g. to a
personal computer), an additional isolating barrier must be
included in order to maintain the SELV classification.
WARNING
If any of the digital inputs (including the drive enable input)
are connected in parallel with an inductive load (i.e.
contactor or motor brake) then suitable suppression (i.e.
diode or varistor) should be used on the coil of the load. If no
CAUTION suppression is used then over voltage spikes can cause
damage to the digital inputs and outputs on the drive.
N
NOTE
Any signal cables which are carried inside the motor cable (i.e. motor
thermistor, motor brake) will pick up large pulse currents via the cable
capacitance. The shield of these signal cables must be connected to
ground close to the point of exit of the motor cable, to avoid this noise
current spreading through the control system.
Figure 4-3 Default terminal functions
1
Analog
frequency
reference 1
Analog
frequency
reference 2
Frequency
At zero frequency
Drive enable
Run forward
Run reverse
Analog input 1/
input 2 select
Drive OK
Onboard Advanced
Diagnostics
PLC parameters
41 42
14
0V common
1
2
4
+10 V
5
7
+24 V
9
10
11
12
13
Analog input 1 select
14
Analog input 2 select
41
42
Unidrive M200 / M201 Control User Guide
Issue Number: 2
UL Listing
Relay
(over-voltage
category II)