Lenze MCH Series - Manual (Page 39)

13435744_EDBMH01_v13 35
Once the desired speed is reached, release the contact and the drive speed will hold
at that value. The DECREASE FREQ function will work when the drive is in a STOP
or RUN mode. The INCREASE FREQ function will only work while the drive is in a
RUN mode.
If HAND SOURCE and/or AUTO SOURCE is set to SELECTED, TB-13A and TB-13B
can be programmed for this function. Program TB-13A (Parameter 47) to DECREASE
FREQ, and TB-13B (Parameter 48) to INCREASE FREQ. Refer to the description of
operation in the preceding paragraph.
NOTE
If TB-13A, TB-13B and TB-13C are all programmed to select speed
references, and two or three of the terminals are closed to TB-2,
the higher terminal has priority and will override the others. For
example, if TB-13A is programmed to select 0-10VDC, and TB-13C
is programmed to select PRESET #3, closing both terminals to TB-2
will cause the drive to respond to PRESET #3 because TB-13C
overrides TB-13A.
14.2.5 ANALOG OUTPUT SIGNALS
There are two terminals that can supply analog output signals proportional to output
frequency and load. Terminal TB-10A can provide a 0-10 VDC or a 2-10 VDC signal
proportional to output frequency, and TB-10B can provide the same signals proportional
to load. The 2-10 VDC signals can be converted to a 4-20 mA signal using a resistor
in series with the signal such that the total circuit resistance is 500 Ohms. For more
information, refer to Parameters: 42 - TB10A OUTPUT, 43 - TB10A SCALING, 44 -
B10B OUTPUT and 45 - TB10B SCALING in Section 18.0 - DESCRIPTION OF
PARAMETERS.
14.2.6 DRIVE STATUS OUTPUTS
The control board has one Form C relay at terminals TB-16, TB-17 and TB-18. Contacts
are rated 2 amps at 28 VDC or 120 Vac.
There are also two open-collector outputs at terminals TB-14 and TB-15. The open-
collector circuit is a current-sinking type rated at 30 VDC and 40 mA maximum. A power
supply (30 VDC max) must be used to power the open-collector outputs. The standard
drive does not have a power supply (a 24 VDC power supply is optional when the drive
is equipped with the Bypass option).
The Form C relay and open-collector outputs can be programmed for many different
status indications. Refer to Parameters 52 - TB14/RELAY #2, 53 - TB15/RELAY #3,
and 54 - RELAY #1.
NOTE
The Bypass option includes two Form C relays and a third is optional
(refer to Appendix A). When the drive is equipped with the Option
Box, there are two Form C relays and two open-collector outputs
(refer to Appendix B).