Rockwell Automation Allen-Bradley IntelliVAC 1503VC-BMC5, Руководство пользователя

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Rockwell Automation Publication 1503-UM053C-EN-P - March 2015 23
Installation and Wiring Chapter 3
This situation can be prevented by consideration of the control devices when
designing the control system. With control devices that have excessive leakage
current (that is PLC or similar control devices) consider using relay outputs with
now suppression across the contacts. If this cannot be done, consider the leakage
current of the device to see if it is compatible with the IntelliVAC inputs (see
Electrical Ratings on page 11 ). If the control device is not compatible consider
using an interposing relay connected as shown in Table 9 .
Figure 9 - Control with Solid-State Devices
Two-Wire Control
If using two-wire control, the CLOSE contactor input is maintained high using a
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 reapplied. See
Figure 10 on
page 24 .
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. See
Table on page 32
.
- +
3
2
12
11
AUX
MOV
M
TCO
5
6
-
+
1
EC
CCO
4
9 10
M
N
G
M
M -IV
M -IV
L
CR
CR
Control Power
Control Power Fuse *
Input Power
Overload
Solid State
Output
Close
* See Table 5 on page 19 for recommended fuse sizing.
ATTENTION: Only disable the Power-Up safety feature when absolutely
necessary. Doing so can create unsafe operating conditions.