The IGE-3000’s filament may be controlled remotely via the D power supply connector by wiring relay contacts or a transistor switch across pins 8 and 9, (refer to section 2.5 /Figure 1 and Figure 3 below). Pin 8 is digital ground and pin 9 is the filament control line. The IGE filament will turn on when pin 9 is pulled low or grounded. This may be accomplished either by relay contacts or by utilizing a transistor switch. A contact closure connected across “D” connector pin 8 and pin 9 must be such that it closes when the IGE- 3000 is to be turned on. The transistor circuit connected across “D” connector pin 8 and pin 9 should be such that it conducts and provides a ground path when the IGE-3000 is to be turned on.
FIGURE 3- REMOTE FILAMENT CONTROL
| CONTROLLING | | | | | | | | |
| | VACUUM | | IGE 3000 |
| | | GAUGE | |
| | | "D" POWER CONNECTOR |
| | | | | | | | | |
| | | | | | | | | | | | | | | | | |
| | | | K1 | | | | | PIN 9 | |
REMOTE START | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | |
| | | K | | | | | | | | | | | | |
RELAY INTERFACE | | | | | | | | | | PIN 8 | |
| | | | | | | | | | | |
| | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | |
| CONTROLLING | | IGE 3000 |
| | VACUUM | |
| | "D" POWER CONNECTOR |
| | | GAUGE |
| | | | | | | | | | |
| | | | | | | | | | | | | | | | |
| | | | | | | | | | | PIN 9 | |
REMOTE START | | | | | Q1 | | | | | | | | | |
| | | | | | | | | | | | | | | | |
TRANSISTOR | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | |
INTERFACE | | | | | | | | | | | PIN 8 | |
| | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | |
NOTE: Manual operation is unaffected by using remote control. (i.e. Filament can be turned off manually if turned on via remote control and filament can be turned on manually, after being turned off via remote control).