Appendix
C.I/O Connections
A
1 | 8 |
9 | 1 5 |
Relay I/O Connector Rear View
Relays are rated for 125VAC or 30VDC, 2A maximum. Inputs can be activated either by connecting to a switch and shorting to Ground, or they can be driven by a TTL compatible signal. These are not isolated inputs! The voltage level applied must be limited to between 0 and +5 volts with respect to Ground.
Pins | Type | Description |
1,2 | Relay | Crystal Fail Relay, contacts closed when all |
|
| enabled sensors have failed. |
3,4 | Relay | Timer Setpoint, contacts closed when timer |
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| reaches Zero from its programmed value. |
5,6 | Relay | Shutter Relay, contacts closed when shutter |
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| is open. |
7,8 | Relay | Thickness Setpoint Relay, contacts close |
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| when thickness value reached. |
9 | Input | Zero Timer Input, grounding this pin will zero |
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| the timer. |
10 | Input | Zero Thickness Input, grounding this pin will |
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| zero the thickness reading. |
11 | Input | Close Shutter Input, grounding this pin will |
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| close the shutter. |
12 | Input | Open Shutter Input, grounding this pin will |
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| open the shutter. |
13,14,15 | Ground |
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