Nidec Digitax ST Series - Control Terminals

34 Digitax ST Installation Guide
Issue: 7
4.7 Control terminals
Figure 4-8 Default terminal functions
For control terminal specification, refer to the User Guide.
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.
WARNING
0V common
External 24V supply
0V common
Analog 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 /
Drive enable
Status relay
(Overvoltage
category II)
Drive OK
Speed
0V common
Analog
speed
reference 2
4
7
11
9
10
8
Torque (active
current)
Analog input 3
Motor thermistor
Connectors specification:
Maximum size of control
connections cable =
1.5mm (16AWG)
2
Torque setting =
0.2 N m (1.8 lb in)
Status relay cable =
2.5mm (12AWG)
2
Torque setting =
0.5 N m (4.4 lb in)
Polarized
signal
connections
If terminal 31 is used as a Safe Torque Off function, the cable must be shielded or
segregated.
NOTE