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ROC800-Series Instruction Manual

Revised Jul-14

Input/Output Modules

4-27

Note

:

If the label on your AC I/O module

does not

indicate 120/240V,

your module is designed for use

only

with 120V. Additionally,

all AC wiring must be shielded.

Table 4-5. Field Wiring Terminals

Terminal

Label

Definition

1

AC In

AC Input (Permissive Power)

2

N

AC Neutral

3

1

Channel 1

4

2

Channel 2

5

3

Channel 3

6

N

AC Neutral

7

4

Channel 4

8

5

Channel 5

9

6

Channel 6

10

N

AC Neutral

The field terminal wiring has the following definitions:

Term

Definition

AC Input

The AC power applied to this terminal is the source for

any channel that is configured as an output. The input to

this terminal should be externally fused with a 10 to 15

amp fuse. The channel has a green LED associated with it

to indicate when power is applied. This terminal is typically

wired to the permissive/safety circuitry so that if this circuit

trips, all power is removed from the channels that are

configured as AC outputs.

AC Neutral

This terminal is connected to the system AC neutral and is

used a reference for all AC power.

Channels 1

through 6

Depending upon the configuration of the DIP switch, each

channel can be configured as an input or an output.

4.13 Thermocouple (TC) Input Module

Caution

The TC2 module is NOT supported in the Series 1 CPU.

The four-channel Thermocouple Input module monitors types B, C, E,

J, K, N, R, S, or T thermocouples, based on how you configure the

module with ROCLINK 800 Configuration software. The type of

thermocouple refers to the material used to make a bimetallic junction.

Dissimilar materials in the junction generate different millivolt levels as

a function of the heat to which the materials are exposed.

The Thermocouple module measures the voltage of the thermocouple to

which it is connected. The TC voltage is measured and a Cold Junction