REMOTE/AUTOMATED CONTROL 6-11
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Tel: 970-495-0187, Fax: 970-484-9350, Internet: www.ionsources.com
Pin
Number
Description
32
No Contact
33
No Contact
34
Program Select 1. This pin is the 1 bit for selecting programs
1 through 4 using negative logic levels of 0 and 5 volts
35
Acquire Setpoints. Hold for one second to remotely acquire
program values applied to the DB-37 analog remote inputs.
36
DB-37 Remote Enable. Enables the auto controller if control
select pin 18 is connected to common pin 7 or 8.
37
No Contact.
6.3 Interlock
A two-pin interlock is located on the rear panel. The interlock pins must be
shorted to allow operation of the Auto Controller. When the interlock pins are
open, the auto controller remains in Standby and the Auto Controller display
says Int Loc. The red Open Interlock indicators on the front panels of the Fila-
ment Power Supply and the Discharge Power Supply are also on when the
Auto Controller interlock is open if there is an RS-485 communication link. The
interlock pin descriptions are given below in table 6-6.
Note that the interlock for the Auto Controller does not open the interlocks for
the
fi
lament and discharge power supplies when the Auto controller is in the
Gas Only mode or when it is turned off. In these cases, the Filament Power
Supply, and the Discharge Power Supply function as independent units. These
power supplies each have interlocks that prevent operation if the two interlock
pins are not closed. The pin descriptions are the same as the interlock for the
Auto Controller. The three interlocks for the Auto Controller, Filament Power
Supply and Discharge Power Supply must all be used to prevent operation for
all contingencies.
Table 6-7. Interlock connections for the auto controller.
Pin
Number
Description
1
Active Low Interlock – Connect to common (Interlock pin 2, or DB-37
pin 7 or 8) to enable the Auto controller.
2
Interlock Return – Common