Lambda 303 Series Operator's Manual - page 38
OPERATING INSTRUCTIONS
6-16
To turn OFF the power supply depress the OFF button or use the inhibit line. Opening
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 ON button de-
pressed followed by the OFF button to RESET the fault. Any other fault occurring in the
internal protection circuitry 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.
6.2
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 6-1, with a schematic showing a suggested
remote interface circuit shown in Figure 6-1.
Pin Signal Name
I/O Description
1
+15VDC
O +15V
1
/
8
A max. May be used to power LEDs etc in a remote control cir-
cuit.
2
READY
O Open collector. Low impedance when power supply is NOT READY.
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
COOLANT WARNING
O Open collector. Low impedance when coolant is below the full level.
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
AUTO DWELL
I
0-10V signal programs AUTO DWELL period between 500us and 5ms
in range 1 (factory preset) or 5ms to 50ms in range 2.
10 HV ON/OFF
I
15V=On, ground or open =Off. Also used to reset latching faults by cy-
cling from On to Off. Input impedance >1M
Ω
11 Vprogram
I
0-10V = 0-100% of rated output voltage. Input impedance >1M
Ω.
12 CURRENT METER
OUTPUT
O Unscaled indication of output current.
13 ANALOG OUT
O 0-10V ( 1%) Analog of output voltage waveform. Impedance 1k
Ω
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 AUTO DWELL LED
O Open collector. Low impedance when AUTO DWELL 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 DO NOT CONNECT