Lenze MCH Series - Manual (Page 83)

13435744_EDBMH01_v13 79
A.2 BYPASS WIRING
MCH drives with the Bypass option do not have a terminal strip in the same location
as a "standard" MCH drive. There is a customer terminal strip located in the Bypass
compartment, eliminating the need to remove the drive cover. All customer wiring is
done in the bypass compartment. These terminals are briefly described below.
Contains two Form C relay outputs for status indication
(such as Run, Fault, At Speed, etc). The relays are rated
2 Amps at 120 Vac or 28 VDC.
Relay #1 is set using Parameter 54 - RELAY #1.
Relay #2 is set using Parameter 52 - TB14/RELAY #2.
Relay #3 is set using Parameter 53 - TB15/RELAY #3.
* A third relay is available as an option, and is included
with the optional 24 VDC power supply (see above).
Customer Start/Stop command between B3 and B4.
N.C. external interlocks between B1, B2, B3 (unit ships
with jumpers; remove jumpers to install interlocks).
Purge command between B1 and B5.
Remove jumper between B6 and B7 to disable bypass.
This terminal strip is at 120 Vac potential!
Essentially a duplicate of the MCH terminal strip. Refer to
Section 15.0 - MCH TERMINAL STRIP for a description
of the terminals.
Terminals 1, 12A, and 13C are used by the bypass and
cannot be used by the customer.
* A 24 VDC, 100 mA power supply is available as an
option. When the drive is equipped with this option, a
third Form C relay is provided (see below).
WARNING!
Do NOT connect 120VAC to this section
of the terminal strip! Severe damage to
the drive will result. This section of the
terminal strip is low voltage DC and
requires dry contacts.
2
5A
5B
6
10A
12A
10B
2
13A
13B
13C
13D
RXA
TXB
2
1
2
+24V
B3
B4
B5
B6
B9
B7
B8
B1
B2
18
19
20
21
26
24
25
16
17
*
*
*
*
*
Relay #1
Relay #2
Relay #3