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Table 7-1. cs2 control signals – Micromod Micro-DCI: 53MC5000 Multi-Loop Process Controller Instruction Manual User Manual

Page 197

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Figure 7-2. DO Output Diverter Circuit

7.2 CS2 CONTROL SIGNALS

Loading CS2 connects the 53MC5000 Controller function blocks for operation as an Analog
Backup Controller. As shown in Figure 7-1, up to nine control signals are available. Table 7-1 be-
low describes the nine signals in CS2.

Table 7-1. CS2 Control Signals

Control

Signal

Definition

Cord

Set

ITB

Rear

Term

Board

Signal

AI0 - Process
Variable

This analog input signal represents the value of
the process to be manipulated by the controller.
It is compared to the control setpoint to
determine the Control Output value.

TB1-1 (+)
TB1-2 (-)
TB1-3

1 (+)
2 (-)
3

+24 V
AI0
SC

AI1

Not used.

AI2 - Additive
Feed Forward
Input

This analog input signal value is added to the
PID result to make up the Control Output value
when Auto operation is active.

TB1-9
TB1-10 (+)
TB1-11 (-)

1
7 (+)
8 (-)

+24 V
AI2
SC

AI3 - Control
Element
Feedback

A feedback signal from the diverter circuit to the
controller that indicates the position of the final
element (valve) so that if operation transfer to
the controller becomes necessary, it will be
bumpless.

TB1-13
TB1-14 (+)
TB1-15 (-)

4
9 (+)
8 (-)

+24 V
AI3
SC

AO0 - Backup
Control Output

This is the 4-20 mA output signal that drives the
final control element if operation is transferred
from the computer to the controller.

TB1-17 (+)
TB1-18 (-)

10 (+)
11 (-)

AO0
PC

AO1 -
Computer
Control Status

It indicates whether the computer (20 mA
output) or the controller (4 mA) is driving the
final element (valve).

TB1-19 (+)
TB1-20 (-)

12 (+)
11 (-)

AN01
PC

DI0 - Computer
Ready

It enables the computer to drive the final
element if it is a closed contact and if R is
selected with the faceplate R/L push button.

TB2-1 (+)
TB2-2 (-)

13 (+)
14 (-)

DI0
PC

DI1 - Auto
Enable

It enables the controller to drive the final
element if it is a closed contact and if L is
selected with the faceplate R/L push button.

TB2-3 (+)
TB2-4 (-)

15 (+)
14 (-)

DI1
PC

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53MC5000 Process Control Station

7-2