Two-wire control – Rockwell Automation 1503VC IntelliVAC Contactor Control Module User Manual
Page 23
Installation and Wiring
3-11
1503-UM051D-EN-P – June 2013
Two-Wire
Control
If using two-wire control, the CLOSE contactor input is maintained
high using a single contact. Momentarily opening this input will
cause the IntelliVAC to open the contactor. Maintaining the contact
will provide a CLOSE command to IntelliVAC (given that all
permissives are satisfied). If a fault occurs, in addition to cycling
control power to the IntelliVAC module, the CLOSE command must
be removed for a minimum of 4 seconds, before being re-applied.
Refer to Figure 3.9.
Some two-wire control schemes may be configured such that a close
command is present when IntelliVAC is energized. In this case, the
Power-Up Safety feature may be disabled by setting DIP switch 12
accordingly. (Available with an IntelliVAC using firmware 2.001
(or newer) refer to Table 4.B).
Note:
Only disable the Power-Up safety feature when absolutely
necessary. Doing so can create unsafe operating conditions.
∗
Refer to Table 3.A for recommended fuse sizing.
N'
N
EMC FILTER
G
P'
P
MOV
3
2
1
EC
-
+
4
TCO
12
11
AUX
CCO
5
6
L1
L2/N
G
+ -
OVERLOAD
CONTROL
POWER
FUSE
*
CONTROL POWER
M-IV
9
10
CLOSE
M
M-IV
M
CAPACITOR
(OPTIONAL)
RUN
∗
Refer to Table 3.A for recommended fuse sizing.
N'
N
EMC FILTER
G
P'
P
MOV
3
2
1
EC
-
+
4
TCO
12
11
AUX
CCO
5
6
L1
L2/N
G
+ -
OVERLOAD
CONTROL
POWER
FUSE
*
CONTROL POWER
M-IV
9
10
CLOSE
M
M-IV
M
CAPACITOR
(OPTIONAL)
RUN
Figure 3.9 – Two-Wire Control