Installing and Controlling Third-Party Devices
Nelson Interfaces: Connections

RS Cable

The pin assignment of the serial cable varies for the different types.

The type 941 is fitted with a 25-pin male connector. You may use a null modem cable for connection. (For more information, refer to  Null Modem Cable (Dionex part no. 8914.0103A: 9-pin COM port) in the Appendix of the Hardware Installation section.)

The types 950, 960, and 970 are fitted with a 25-pin female connector. The cable must connect the pins 1, 2, 3, 4, 5, and 7 on this connector with the same pins on the 25-pin male connector on the PC, that is, not crossed, with hardware handshake. You may use a modem cable for connection. (For more information, refer to  Modem Cable (1:1 Cable) (Dionex part no. 8914.0128: 25-pin COM port or 8914.0144A: 9-pin COM port) in the Appendix of the Hardware Installation section.)

The type 901/902 is fitted with an RJ-45 connector for the serial interface. Use the special Nelson RS cable to connect the interface. (For more information, refer to  Nelson Cable in the Appendix of the Hardware Installation section.)

Start, Stop, Ready

The start input is intended for the autosampler start signal (inject response). Normally, you can use the assignment of the previous installation, for example, ACCESS*CHROM.

The stop input is intended for the stop signal to complete the data acquisition. As Chromeleon does not support this option, remove any connected cable(s).

The Ready output informs the instruments that the box and Chromeleon are ready for injection and data acquisition. In Chromeleon, this signal is enabled via the Inject command. It is disabled as soon as Chromeleon receives the inject response. If possible, this cable should be connected. Exception: If a separate Dionex device driver controls the autosampler, ensure that the autosampler is not connected to the Ready output. Otherwise, the autosampler may not inject since the Ready line is not cleared.

Channels A-B and Relays 1-7

Normally, the assignment of the previous installation can be used.

Rack/Vial Port

Chromeleon uses this port to read the sample position. For the assignment, refer to the manual for the box. Please note that the pin assignment is as follows. Left row from top to bottom: 1 to 8; right row: 9 to 15.

Normally, the assignment of the previous installation can be used.

For the Nelson Box 901, the rack/vial port is available only as an option.

For more information about how to install the Nelson Interfaces, refer to:

 Nelson Interfaces: Installation

 Nelson Interfaces: Overview

 Nelson Interfaces: Device Driver Configuration

 Nelson Interfaces: Properties

 Nelson Interfaces: Data Acquisition Restrictions

 Nelson Interfaces: Differences from Conventional Nelson Box Installations