Overview
2.4.2.8 Axis Overtravel Limit Switches
Overtravel is prevented in each direction for each axis of rotation by electrical limit
switches with normally closed (open upon limit engagement) contacts. The
switches are designed with double break contacts such that movement of the
switch actuator in either direction opens a corresponding set of discrete contacts.
In this manner, only one limit switch assembly is required for each axis. Each
switch is mounted with brackets, including adjustable strikers for each direction of
travel.
2.4.2.9 Drive Cabinet Low-Temperature Option
The standard 7200 ACS drive cabinet is rated to operate in an outside ambient
temperature range of 14° F (-10 °C) to 122° F (+50 °C). For systems where the
ambient temperature will fall below 14° F (-10 °C), an optional low-temperature
package is available for the drive cabinet.
For the low-temperature option package, a 200 watt forced air convection heater
with integrated fan and wall insulation are installed inside the drive cabinet. Over
current protection is provided by an individual circuit breaker sized to the wattage
and input voltage of the heater. When the thermostat inside the drive cabinet
registers a temperature below 41°F (5°C), the heater is activated and heats the air
inside the drive cabinet. An external thermostat shuts the heater off when outside
air exceeds 41°F (5°C). The heated air maintains the internal temperature of the
drive cabinet to within the standard operating temperature range.
2.5 Controls and Indicators
The controls and indicators for the 7200 ACS are located on the ACU and inside
the drive cabinet. The EMERGENCY STOP button is located on the outside of the
drive cabinet and additional optional emergency stop switches may be provided at
other locations.
2.5.1 7200 ACU Controls and Indicators
The controls and indicators for the ACU are located on the front panel and on the
rear panel. The following sections describe the functions of the ACU controls and
indicators.
2.5.1.1 The Power On/Off Switch
The power on/off switch is located on the rear of the 7200 ACU in the power
entry module. When the switch is set to the on position, power is applied to the
power supply in the ACU.
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