Absolute Process Instruments APD 1420 Manual de início rápido - Página 2

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Installation and Setup

Precautions

WARNING! All wiring must be performed by a qualified elec-

trician or instrumentation engineer. See diagram for terminal

designations and wiring examples. Consult factory for assis-

tance.

WARNING! Avoid shock hazards! Turn signal input, output,

and power off before connecting or disconnecting wiring, or

removing or installing module.

Précautions

ATTENTION! Tout le câblage doit être effectué par un élec-

tricien ou ingénieur en instrumentation qualifié. Voir le dia-

gramme pour désignations des bornes et des exemples de

câblage. Consulter l'usine pour assistance.

ATTENTION! Éviter les risques de choc! Fermez le signal

d'entrée, le signal de sortie et l'alimentation électrique avant

de connecter ou de déconnecter le câblage, ou de retirer ou

d'installer le module.

API maintains a constant effort to upgrade and improve its products.

Specifications are subject to change without notice. See api-usa.com for

latest product information. Consult factory for your specific requirements.

WARNING: This product can expose you to chemicals includ-

ing nickel, which are known to the State of California to cause

cancer or birth defects or other reproductive harm. For more

information go to www.P65Warnings.ca.gov

Input

The sensor type and temperature range are factory config-

ured. See the model/serial number label for module infor-

mation, sensor type, temperature range and options. Tem-

perature sensor inputs are connected as shown in the wiring

diagrams below.

Alarm Types

Note that the deadband is symmetrical about the setpoint;

relay trip and reset points will both change if either the set-

point or deadband are changed.

High Alarm (default, H, or HH): The alarm relay changes state

when the temperature exceeds the deadband trip point. The relay

resets when the temperature drops below the deadband reset

point. For a high alarm, the trip point is above the reset point.

Low Alarm (L or LL): The alarm relay changes state when the

temperature goes below the deadband trip point. The relay

resets when the temperature exceeds the deadband reset

point. For a low alarm the trip point is below the reset point.

HT: Latching alarm with push button reset

HP: Latching alarm with power-off reset. Module power must

be turned off to reset alarms

R: Reverse-acting alarms. Relay coils energized in an alarm

condition. No alarm condition with module power off.

Relay Output Terminals

See wiring diagrams below right for connections. APD mod-

ules do not provide power to the relay contacts. Inductive

loads (motors, solenoids, contactors, etc.) will greatly shorten

relay contact life unless an appropriate RC snubber is in-

stalled.

The APD 1400 operates two sets of relays in unison with a

single setpoint. The dual SPDT contact sets are in a Form C

configuration.

The APD 1420 operates two sets of relays independently,

each with its own setpoint. The dual SPDT contact sets are in

a Form C configuration.

Module Power Terminals

Check model/serial number label for module operating volt-

age to make sure it matches available power.

When using DC power, either polarity is acceptable, but

for consistency with similar API products, positive (+) can

be wired to terminal 13 and negative (–) can be wired to

terminal 16.

Mounting To a DIN Rail

Install module vertically on a 35 mm DIN rail in a protective

enclosure away from heat sources. Do not block air flow. Al-

low 1" (25 mm) above and below housing vents for air cir-

culation.

1. Tilt front of module downward and clip the lower mount

with spring clips to the bottom edge of DIN rail.

2. Push front of module upward until upper mount snaps into

place.

BSOLUTE

ROCESS

Removal From a DIN Rail

1. Push up on the bottom back of the module.

2. Tilt front of module downward to release upper mount

from top edge of DIN rail.

3. The module can now be removed from the DIN rail.

Setup and Calibration

The input range is factory calibrated and does not require

adjustment.

Relay operation is factory configured. See model/serial num-

ber label for relay configurations.

The Setpoint potentiometer allows the operator to adjust the

level at which the alarm is activated. This control is adjustable

from 0 to 100% of the input range.

The Deadband potentiometer allows the alarm trip and reset

window to be adjusted symmetrically about the setpoint from

1 to 100% of the span. This allows the operator to fine tune

the point at which the alarm trips and resets. The deadband

is typically used to prevent chattering of the relays or false

trips when the process signal is unstable or changes rapidly.

To calibrate the alarm section, set the deadband control to the

minimum (counterclockwise). The deadband will be 1.0% of

input span in this case.

Set the signal source to a reference that represents the

desired trip point.

Adjust the setpoint control to the point at which the relay

changes state from a non-alarm to an alarm condition.

If a larger amount of deadband is desired turn the deadband

potentiometer clockwise. The deadband is symmetrical about

the setpoint; both transition points will change as deadband

is increased.

Relay set and reset points will both change if the setpoint or

deadband are changed. Alternately set the setpoint and dead-

band until the desired trip and rest points are set.

Output Test Function

When the front test button is depressed it will drive the relays

to their opposite state. A customer-supplied switch connected

to terminal 4 and 8 can also be used to toggle the relays. When

released, the relays will return to their prior states.

This can be used as a diagnostic aid during initial start-up or

troubleshooting, or as a manual over-ride function. The Test

button also resets the relays on models with the HT option.

Operation

The green LoopTracker

input LED provides a visual indica-

tion that a signal is being sensed by the input circuitry of

the module. It also indicates the input signal strength by

changing in intensity as the process changes from minimum

to maximum.

If the LED fails to illuminate, or fails to change in intensity as the

process changes, check the module power or signal input wiring.

Note that it may be difficult to see the LEDs under bright lighting

conditions.

The bi-color alarm LED provides a visual indication of the

alarm status. In all configurations, a green LED indicates

a non-alarm condition and a red LED indicates an alarm

condition.

In the normal mode of operation, the relay coil is energized in

a non-alarm condition and de-energized in an alarm condi-

tion. This will create an alarm condition if the module loses

power. For a normal acting, non-latching configuration, the

alarm will activate when the input signal exceeds the setpoint

(HI alarm) or falls below the setpoint (LO alarm), then will

automatically reset when the alarm condition no longer exists.

For a reverse acting alarm, the relay coil is de-energized in a

non-alarm condition and energized in an alarm condition. The

alarm activates when the input signal exceeds the setpoint (HI

alarm) or falls below the setpoint (LO alarm), then automati-

cally resets when the alarm condition no longer exists.

For models with the latching relay option, it will be necessary

to push the Test button or remove power from the module to

reset the alarm, depending on the type of latching option. The

alarm will only reset if the alarm condition no longer exists.

NSTRUMENTS

Relay 1

Relay 2

Input

9 10 11

Power

Test

Deadband

Setpoint

APD 1400

RTD Input to

Single Alarm Trip

Two Wire RTD Input

To maintain full isola-

tion avoid combining

power supplies in

common with input,

output, or unit power.

3-Wire RTD Input

Cu 60/75°C

conductors

14 AWG

max.

1220 American Way Libertyville, IL 60048

Phone:

800-942-0315

Fax: 800-949-7502

APD 1400, APD 1420

1 2 3

4 and 8

Relay Test

5 6 7

Wire terminal torque

0.5Nm to 0.6Nm

(4.4 to 5.3 in-lbs)

To avoid damage

to the module,

do not make any

connections to

unused terminals

To maintain full isola-

tion avoid combining

power supplies in

common with input,

13 14

output, or unit power.

Customer-Supplied

Remote Test Switch

NO C NC

Relay Wiring APD 1400

Customer-Supplied

Remote Test Switch

NO C NC

RLY 1

NO C NC

RLY 2

Relay Wiring APD 1420

Deadband 2

Alarm 2

Setpoint 2

Input

Test

Input

Loop

Tracker

Deadband 1

Alarm

Alarm 1

Setpoint 1

APD 1420

RTD Input to

Dual Alarm Trip

2-Wire Input

Jumper 10 & 11

Module Power

AC or DC +

AC or DC –

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