INDELAC CONTROLS 22018-DH, Инструкция по установке, эксплуатации и обслуживанию

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PART #22018-DH - High-Resolution Positioner
Page 6
motion. When power is removed from the DHC-400, the electronic braking feature is disabled. In
some applications, a brake is required for mechanical reasons, such as avoiding back driving the
motor; the DHC-400 is suitable for powering most brakes, however, consult the actuator
manufacturer for more information.
OVERRIDE (J7):
J7 provides a simple 2-wire connection that can override the DHC-400 to perform a variety of
external control functions. Using an appropriate interface module, commonly used auto/manual
station switches are easily implemented with low voltage/low current switches. See Special
Applications for more details. The factory installed jumper between pins 1 and 2 enables normal
operation of the DHC-400 and must be installed if the external override functions are not used.
MODE:
The MODE button is used to select the desired function of operation. When the MODE button is
pressed, the unit will switch to the next function and the appropriate LED indicator will turn on to let
the user know which function is selected. Except for the MANUAL/FB POT CAL mode, the
associated mode indicator will be steady on; for some of the modes other indicators will flash to
indicate specific settings associated with the mode. Each of the modes are described in more detail
in the following sections.
If a 0-5V or 0-10V command signal is used, the LOSS OF COMMAND function cannot be used. The
MODE button will skip over the LOSS OF COMMAND mode when the unit is configured for a 0-5V
or 0-10V command signal (see COMMAND TYPE). When the OVERRIDE mode is enabled (see
OVERRIDE MODE), the MODE button is disabled and the Manual/Pot Cal indicator will turn on
steady.
ADJUST UP (▲) and ADJUST DOWN (▼):
The adjust up (▲) and adjust down (▼) buttons are used to adjust the setting of any given function.
When a function is selected by the MODE button, the adjust buttons will affect that function only.
Note, that the AUTO mode does not have any adjustable settings, and therefore,
the adjust up (▲)
and adjust down (▼) buttons have no effect. Also, the adjust buttons are disabled in the OVERRIDE
mode.
OVERRIDE MODE:
The OVERRIDE mode is not selected by the MODE button and can be enabled at any time by
connecting a resistance greater than 250 ohms to the Override Input (J7 pin 1 and pin 2). While the
OVERRIDE mode is enabled, the MODE button and adjust buttons are disabled, and the
Manual/Pot Cal indicator will turn on steady to indicate that the unit is being controlled by the
Override Input. Shorting J7 pin 1 to pin 2 returns the unit to normal operation and the previously
selected mode.