Type 246
Interface Connector J9, 9-pin male Type "D"
|
Pin
|
Assignment
|
Description
|
| 1 |
Analog Return |
. |
| 2 |
0 to 1 VDC (nominal) Corrected Output |
Flow Output corrected by rear panel gauge factor scaling control |
| 3 |
Analog Return |
. |
| 4 |
Remote On/Off |
Line used for external (remote) control of flow controller. Compatible with all 5V logic, this line is held high (or left unconnected), causing a flow "off" condition when the SET POINT SOURCE SWITCH is in the EXT position. |
| 5 |
No Connection |
. |
| 6 |
0 to 5 VDC Output |
MFC output voltage, after being zero corrected by the front panel ZERO CONTROL circuitry |
| 7 |
Set Point Input |
Line used to input an external setpoint signal for direct control (EXT position) or ratio control (RATIO positon) |
| 8 |
Digital Ground |
Return for remote ON/OFF line (pin 4) |
| 9 |
Chassis Common |
. |
MFC Connector J8; 15-pin female Type "D"
|
Pin
|
Assignment
|
Description
|
| 1 |
No Connection (NC) |
. |
| 2 |
Flow Input Signal |
The output from the MFC is applied here |
| 3 |
No Connection |
. |
| 4 |
No Connection |
. |
| 5 |
Power Ground |
. |
| 6 |
-15 VDC |
Supplied by the 246 |
| 7 |
+15 VDC |
Supplied by the 246 |
| 8 |
Set Point Output Signal |
From the 246 unit to the MFC |
| 9 |
No Connection |
. |
| 10 |
Flow Out |
A 0 to 5 VDC zero-corrected output sent back to the MFC for use with the set point circuitry to ensure that set point matches the actual flow |
| 11 |
No Connection |
. |
| 12 |
Analog Return |
. |
| 13 |
No Connection |
. |
| 14 |
No Connection |
. |
| 15 |
Chassis Common |
. |
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Note:
This information is subject to change without notice.
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