Safety
Information
Introduction
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Information
System
configuration
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Installation
Electrical
Installation
Getting
Started
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parameters
Running
the motor
Optimization
SMARTCARD
operation
Onboard
PLC
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parameters
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Data
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UL Listing
Information
Unidrive SPM User Guide
93
Issue Number: 3 www.controltechniques.com
All digital terminal functions (including the relay) can be programmed in
menu 8.
The setting of Pr
1.14
and Pr
6.04
can cause the function of digital inputs
T25 to T29 to change. For more information, please refer to section
13.21.1
Reference modes
on page 254 and section 13.21.7
Start / stop
logic modes
on page 259.
N
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.
N
The SAFE TORQUE OFF (SECURE DISABLE) / drive enable terminal is
a positive logic input only. It is not affected by the setting of Pr
8.29
Positive logic select
.
N
The common 0V from analog signals should, wherever possible, not be
connected to the same 0V terminal as the common 0V from digital
signals. Terminals 3 and 11 should be used for connecting the 0V
common of analog signals and terminals 21, 23 and 30 for digital
signals. This is to prevent small voltage drops in the terminal
connections causing inaccuracies in the analog signals.
Figure 6-43 Default terminal functions
* With software V01.07.00 and later, Analog input 3 is configured as a
motor thermistor input. With software V01.06.02 and earlier, Analog
input 3 has no default function. Refer to
Analog input 3
on page 94.
**The SAFE TORQUE OFF (SECURE DISABLE) / Drive enable terminal
is a positive logic input only.
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
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.
If any of the digital inputs or outputs (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
suppression is used then over voltage spikes can cause
damage to the digital inputs and outputs on the drive.
Ensure the logic sense is correct for the control circuit to be
used. Incorrect logic sense could cause the motor to be
started unexpectedly.
Positive logic is the default state for.
WARNING
WARNING
CAUTION
CAUTION
NOTE
NOTE
NOTE
1
11
Polarized signal
connectors
21
31
41 42
0V common
External 24V supply
0V common
Analog frequency/speed
reference 1
Connections for
single-ended input
signal
Connections for
differential input signal
0V common
0V common
0V common
Analog input 2
Analog input 1
0V common
1
2
5
6
3
21
22
23
24
25
26
27
28
29
30
31
41
42
At zero speed
Reset
Run forward
Run reverse
Analog input 1/
input 2 select
Jog forward select
SAFE TORQUE OFF
(SECURE DISABLE) /
Drive enable**
Status relay
Drive OK
Speed / frequency
0V common
Analog
frequency/speed
reference 2
4
7
11
9
10
8
Torque (active
current)
Analog input 3
Motor thermistor*