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R.T.A. s.r.l. - Via E. Mattei – Fraz. Divisa 27020 Marcignago (PV) – Tel. +39.0382.929.855 - Fax +39.0382.929.150 – http://www.rta.it
© R.T.A. s.r.l. ANDCME04 – 01/22
[...]
UL
Some parts of the text between square brackets are the original definition of UL
standard rules.
These requirements are mandatory for the models of this manual that are UL
compliant. These models can be identified by UL mark in the identification label
on the specific model.
In any case, we advise to comply with these requirements even for non-UL
certified models.
WARNING
: It is user RESPONSIBILITY to check that this manual refers to product model and
version that will be used.
1)
GENERAL CHARACTERISTICS
A-NDC 04
A-NDC 04.V
A-NDC 06
A-NDC 06.V
A-NDC 94
A-NDC 96
A-NDC 96.S
V
DC
nom
(V)
from 24 to 85
from 24 to 85
from 24 to 85
from 24 to 85
I
NP
min
(A)
0.65
1.9
0.65
1.9
I
NP
max
(A)
2
6
2
6
Dimensions
(mm)
93.5 × 101 × 25
110 × 108 × 34
Operating temperature
from + 5°C to + 45°C (see point 7)
Table 1
V
DC
nom
Nominal value of DC voltage supply (range) at which the drive can operate without stabilized
supply.
I
NP
Nominal phase current (peak value) which flow in each motor winding, measurable with motor
turning at low speed. This current can be selected by user among eight different values using
DIP-SWITCHES. Automatic current reduction at motor standstill is 50% of value set using DIP-
SWITCHES.
I
NP
min and max
Minimum and maximum value of nominal phase current setting.
2)
LOGIC INPUT AND OUTPUT SIGNALS (connectors AM3 or C2, see Fig. 1, 7, 9 and 10)
All inputs and outputs are optically insulated (mutually and respect to internal power circuit). For all inputs and outputs you
have both positive and negative terminal.
Driving an input with a slow signal (i.e. relays) or with variable delay (i.e. PLC output) can give precision problem
or, worse, make the board do not work at all. If you have this type of signal, contact R.T.A.
2(-) ; 3(+) CURRENT OFF INPUT:
When this signal is ON drive is active. When it is OFF drive is inhibited, thus motor
current (and so holding torque) is turned to zero.
With jumper CO this input is always ON
(drive is always
active).
4(-) ; 5(+) DIRECTION INPUT:
With this signal ON motor rotation direction is opposite to the one obtained with input
OFF. This signal has to be valid at least 20 µsec. before STEP signal and has to stay in this state for at least
20 µsec. after last step sent to the drive.
6(-) ; 7(+) STEP INPUT:
Step is performed on ON-OFF transition of this signal. Suggested duty-cycle: 50%. Max.
frequency: 300 KHz
(1)
with square wave signal supplied from a source with voltage between 3.5 and 13 Volt
(or a nominal voltage of 24 Volt for A-NDC96.S). In any case STEP signal half period has to be higher than
1.5 µsec.
(1)
NOTE:
Max. frequency = 100 KHz with B and D type current profiles (400, 800 and 1600 steps/rev).
Max. frequency = 200 KHz with B and D type current profiles (3200 steps/rev).
Max. frequency = 300 KHz with B and D type current profiles (6400 and 12800 steps/rev).
