TDK-Lambda 203, Operator'S Manual, Page: 40 / 60

OPERATING INSTRUCTIONS
83489011 Rev A
7-16
To turn OFF the power supply depress the OFF button or use the INHIBIT input. Open-
ing the interlock terminals will also cause the power supply to turn off. In this case the
unit can only be turned back on after the interlock has been closed and the OFF button
depressed to RESET the fault. Any other fault occurring in the internal protection cir-
cuitry will interrupt the power supply's operation causing it to turn OFF.
For a full explanation of each control and indicator refer to Section 5.
7.2 REMOTE OPERATION (All models)
All 203/303 models are easily controlled through the 25 pin sub D-type remote interface
connector located on the rear panel. The minimum required signals for remote control
operation are; HV ON/OFF, Vprogram and GND. The remaining signals are provided for
status monitoring and fault diagnosis, or more sophisticated control methodologies. A
description of each signal is shown in Table 7-1, with a schematic showing a suggested
remote interface circuit shown in Figure 7-1.
Pin Signal Name I/O Description
1 +15VDC O +15V 125mA max. May be used to power LEDs etc in a remote control
circuit.
2 FAULT O Open collector. Low impedance when FAULT is present.
3 INBIHIT LED O Open collector. Low impedance when power supply is inhibited from
charging.
4 END OF CHARGE
LED O Open collector. Low impedance when power supply reaches End of
Charge.
5 EXCESS REVERSAL O Open collector. Low impedance when EXCESS REVERSAL is sensed.
6 HV ON O Open collector. Low impedance when HV OUTPUT is ON
7 OVER VOLTAGE O Open collector. Low impedance when output OVERVOLTAGE is
sensed.
8 ARC O Open collector. Low impedance when ARC is detected in the HV tank.
9 AUTOINHIBIT I 0-10V signal programs AUTOINHIBIT period between 500us and 10ms
in range 1 (factory preset) or 50

s to 1ms in range 2.
10 HV ON/OFF I 15V=On, ground or open =Off. Also used to reset most latching faults
by cycling from On to Off. Input impedance >1M

11 Vprogram I
0-10V = 0-100% of rated output voltage. Input impedance >1M

12 CURRENT METER
OUTPUT O Output current , 0-10VDC = 0-100% of rated current.
13 ANALOG OUT O
0-10V (
±
1%) Analog of output voltage waveform. Impedance 1k

14 INTERLOCK LED O Open collector. Low impedance when external interlock circuit is open
or power supply top cover is removed.
15 INPUT POWER
FAULT LED O Open collector. Low impedance when input power fault occurs (high,
imbalance, interlock). When signal is activated the supply will latch off.
16 AUTOINHIBIT LED O Open collector. Low impedance when AUTOINHIBIT is activated.
17 LOAD FAULT LED O Open collector. Low impedance when LOAD FAULT condition occurs.
Load fault is a non-latching fault and will self reset after approximately
500ms (for models without LP option).
18 Iprogram I 0-10V signal programs the output current between 0 and 100% of rated
current