The communications panel, which is located in the recessed area on the right side of the MS, includes the following:
- Ethernet port: Provides a connection to an Ethernet switch for communication to an LC/MS system. An LC/MS system includes the data system computer, the MS, and an optional LC system.
- USB ports: Two USB ports provide a connection for a divert/inject valve and syringe pump.
- Analog Input: Provides a connection for an external device, such as an LC instrument. Two analog channels (2V Max and 10V Max) connect to two separate 12-bit analog-to-digital converters (ADC) for on-demand conversion of the input voltage.
- Peripheral Control: Provides a contact closure interface for an external device.
- Reset button: When you briefly press the system reset button, the embedded processing system and digital circuitry reset, and the system software reloads from the data system computer.
- For more information about resetting the MS, see Reset the MS if it is not communicating with the data system.
IMPORTANT
Pressing the reset button resets the instrument to the power-up state. Only press the reset button if the instrument does not respond to the control program on the data system computer or if you need to restart the instrument without turning off the Electronics service switch.
| No. | Description | No. | Description |
|---|---|---|---|
1 | Ethernet port (1000 Base T, Gigabit) | 4 | Peripheral Control connector |
2 | USB ports | 5 | Reset button |
3 | Analog Input connector |
Pin | Label | Description |
|---|---|---|
1 | Chassis | Earth ground (for pins 3 and 4) |
2 | Not used | |
3, 4 | 2V Max: + (positive, pin 3) and – (negative, pin 4) | Provides a connection for an external device, such as an LC instrument. Input: 0–2 Vdc (voltage clamps at 5 Vdc) An analog channel (2V Max) connection to a 12-bit analog-to-digital converter (ADC) for on-demand conversion of the input voltage. |
5 | Chassis | Earth ground (for pins 7 and 8) |
6 | Not used | |
7, 8 | 10V Max: + (positive, pin 7) and – (negative, pin 8) | Provides a connection for an external device, such as an LC instrument. An analog channel (10V Max) connection to a 12-bit analog-to-digital converter (ADC) for on-demand conversion of the input voltage. Input: 0–10 Vdc (voltage clamps at 15 Vdc) |
Pin | Label | Description |
|---|---|---|
1 | Ground | Earth ground |
2 | 5V | Provides a 5 Vdc, 500 mA output (with pin 1). |
3 | Not used | |
4 | Start In | Receives the start signal from the contact closure connection of a connected external device. To activate this signal, the external device must pull the signal either low (below 0.75 Vdc) or high (above 2.4 Vdc), depending on the polarity, for at least 100 ms by using a relay, an open-collector driver, or a similar device that connects between pins 4 and 1. NOTE: In the Instrument Configuration window, set the contact closure signal to “High-to-low edge” or “Low-tohigh edge,” whichever matches the setting for the connected external device. |
5 | Ready Out | Provides a relay-driven programmable output signal to the connected external device. The relay opens when a method starts and closes when the method finishes. Output: Maximum 24 Vdc, 3 A |
6 | Injection Hold | Provides a relay-driven programmable output signal to the connected external device, such as a fraction collector. Output: Maximum 24 Vdc, 3 A |
7 | Not used | |
8 | RO/IH | Common (return) connection for the Ready Out and Injection Hold pins. |