Connecting the PTC - motor temperature protection
The PTC - motor temperature protection sensor will be connected between terminal
X2/58 and X2/59. This input is protected against overvoltage by a Zener diode. In
case of overvoltage on this input, the Zener diode will blow and must be replaced
for proper operation.
X2
22k
Ω
+15V
58
59
PT C+
AGND
T rip if > 2V
Ω
°C
The analog input AI1
Input for an analog voltage comparator. Input value 0 …10 VDC
X2
70
61
AGND
AI1
The activation level of the comparator and the time delay and the output
relay to be triggered are programmed in menu C.
Inhibit the analog speed reference input
The analog speed reference input voltage can be affected by inducted
disturbances. To reduce or eliminate the impact of those signal noises, the
EMC mounting instructions specified at the end of this manual must be
respected.
X2
INHA
+25V
63
11
Such speed variations during the machining process are often not welcome. The
K4000 frequency inverter offers a great solution to this problem. A digital signal,
coming from the CNC controller, can be used to inhibit the analog speed reference
signal during machining.
Closing a contact between terminals X2/11 and X2/63 will inhibit the
processing of the analog speed reference signal
and the speed will be hold
constant at the last registered value. To activate again the analog speed reference
input, just open the contact.
Selecting one of the pre-set speeds
The selection of one of the 3 pre-set speeds is made by applying 25V to
the 2 terminals X2/73 and / or X2/74 using a BCD coding.
X2
2
0
2
1
+25V
21
73
74
No 25 V applied
Analog speed reference active
25 V to X2/73
Pre-set speed 1
25 V to X2/74
Pre-set speed 2
25 V to X2/73 and X2/74
Pre-set speed 3
Page 24 / 48
User Manual K4000
S476-gb-0348