Emerson E2 Input and Output Setup, 16AI, 8IO, and MultiFlex Inputs, Sensor Wiring Types

9 Input and Output Setup

9.1The 16AI, 8IO, and MultiFlex Inputs

9.1.1Connecting Sensors to Input

Boards

There are five I/O Network boards that may accept inputs: the MultiFlex, the 16AI, the ARTC, and the 8IO Combination Input/Output Board. Wiring an input to these boards requires three steps:

1.Connect the sensor’s signal wires to the two ter- minals of an input point.

2.Set the input type dip switch that corresponds to the point being connected.

3.If necessary, connect the power lead of the sensor to one of the 5V or 12V power terminals.

9.1.1.1Wiring

MultiFlex Boards

An input point connector on a MultiFlex, 16AI, and 16AIe board consists of two terminals, as shown in Figure 9-1. One of these terminals, labeled “SIG”, reads the sig- nal from the sensor, while the other, labeled “0v” is where sensor’s ground and/or cable shield wire is connected.

Figure 9-1- Input Board Points

16AI Boards

On a 16AI, terminals are numbered 1-32, starting with the first terminal of point 1 and ending with the last termi- nal of point 16. The even-numbered terminals of a 16AI are always where the signal voltages are connected. The sensor grounds and cable shields are connected to the odd- numbered terminals.

8IO and ARTC Boards

On an 8IO board, the two terminals of every point are labeled “-” or “+”. The ground wire is always connected to the “-” terminal, and the signal wire is connected to the

“+” terminal.

On the ARTC board, the input and output points are predefined and are labeled accordingly.

9.1.1.2Sensor Wiring Types

Specific wiring types are required for each type of sen- sor used with E2.

All Analog Temperature Sensors and Air Flow Sen- sors

Temperature and air flow sensors are to be wired with shielded, 2 conductor, at least 22 GA wire (Belden # 8761 or equivalent).

All Pressure Transducers, Humidity Sensors, and Refrigeration Transducers

Pressure and refrigeration transducers and humidity sensors are to be wired with shielded, 3 conductor, at least 22 GA wire (Belden #8771 or equivalent).

Dewpoint and Light Level Sensors

These sensors are to be wired with shielded, 4 conduc- tor at least 22 GA wire (Belden # 8729 or equivalent).

9.1.1.3Input Type Dip Switches

An input type dip switch must be set for each input point. Input type dip switches are located in the switch banks labeled S1 and S2 on the MultiFlex, 16AI, and switch bank S4 on the 8IO.

The input type dip switch tells the input board whether or not the sensor connected to the point requires a DC sup- ply voltage in order to operate. If the sensor requires DC voltage, the dip switch should be set to the DOWN posi- tion. If the sensor does not require power, or if it uses AC power, the dip switch should be set to the UP position. Dip switches for unused points should be set to the UP posi- tion.

The dip switch positions for each specific sensor type is shown in Figure 9-2.

The 16AI, 8IO, and MultiFlex Inputs Input and Output Setup • 9-1