Installation

Input/Output Ports

You can use the input and output contacts found on the rear panel of the liquid handler to control peripheral devices. Refer to the diagram on page 2-16for the location of the input/output ports.

Contact inputs

The input terminal block of the liquid handler has eight contacts. All of the inputs are paired, and each pair includes a GROUND reference ().

The contact input pairs are labeled A, B, C, and D.

A contact is connected if it has a short across the input or is held low by a TTL output or other device.

Never connect voltages higher than 5V DC to an input. When using TTL signals, be sure to match GROUND connections.

Contact outputs

The output terminal block has 10 contacts.

Pins 1 and 2 supply a +24V DC output. Do not use this output unless the receiving device can accept 24V power.

Pins 3 through 10 are paired, isolated-relay contact closures and are labeled 1, 2, 3, and 4.

Items you’ll need

To make connections, you’ll need the following:

2-conductor cable (22–30 gauge for each wire)

wire insulation stripper

small-blade screwdriver

You can purchase a 6-foot piece of suitable cable (part number 709910206) or a package of five cables with identification markers (part number 36078155) from Gilson.

2

Electrical Connections

2-17

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Gilson 215 manual Installation Input/Output Ports, Contact inputs, Contact outputs, Items you’ll need