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5 220A
Instruction Manual
2-4
Table 2-1. Controls, Indicators, and Connectors
Ref.
No Name Function
1 STATUS Indicators Three LEDs that light on an individual basis to indicate that the 5220A
has exceeded an operating limit. When the limit condition is detected the
5220A is switched to the standby mode. When the limit condition is
cleared the LED will remain lit until the 5220A is commanded to the
operate mode. The three status conditions are as follows:
THERMAL CUTOFF: Indicates that the output stage of the 5220A has
exceeded its maximum operating temperature.
OVERCOMPLIANCE: Indicates that the compliance voltage at the output
terminals has exceeded its limit.
OVERCURRENT: Indicates that the output current has been
programmed beyond its upper limit.
2 CONTROL Switches
and Indicators
A series of pushbutton switches and LEDs used to select and indicate
the 5220A operating mode. The function of each is as follows:
OPR/STDBY Switch: Allows alternate selection of the standby and
operate modes.
INPUT Switch: Allows alternate selection of the front and rear input
connectors.
REMOTE Switch: Allows recall of the local mode when remote is
enabled and the LOCAL LOCKOUT LED is not lit.
OPR/STBY LEDs: One of the two is lit to indicate the current operating
mode, operate or standby.
FRONT/REAR LEDs: One is lit to indicate the selected voltage input
connector, front or rear.
REMOTE LED: Lights to indicate that the remote mode has been
remotely selected. If the LED is not lit the local mode is enabled.
LOCAL LOCKOUT LED: Lights to indicate that the unit has been
remotely locked in the remote mode. In this event, the three front panel
CONTROL switches are disabled.
3 POWER Switch A push-push switch used to switch instrument power on and off.
4 CURRENT OUTPUT
Terminals (Front)
A pair of banana-jack terminals used to provide front-panel connection to
the output of he current source. The terminals are inactive when the rear-
panel output terminals are selected.
5 VOLTAGE INGUT
Terminals (Front)
A pair of banana-jack terminals that serve as control voltage input
connections in the local/front-input mode.
6 MIS* Bus Connector A 24-pin connector used as an I/O port for remote operation (Fluke MIS
Bus) of the 5220A. When the 5220A is interfaced with a 5100 Series
Calibrator (by way of a Y5000 interface) the 5220A output can be
controlled from the 5100 front panel.
7 Ventilation Filter Prevents dirt and debris from being drawn into the 5220A intake
ventilation port.