Absolute Process Instruments APD 1401 D Manuale di avvio rapido - Pagina 2

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Installation and Setup

Precautions

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

cian or instrumentation engineer. See diagram for terminal des-

ignations and wiring examples. Consult factory for assistance.

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

Electrical Connections

See wiring diagrams. Observe input connections. If the output

does not function, check all wiring and polarity.

Do not make any connections to unused terminals or use

them as wiring junctions for external devices. This may cause

permanent damage to the module!

Input

The sensor type and input range is factory pre-configured (at

24°C ±1°C) and do not require adjustment. See the model/

serial number label for sensor type, temperature range and

options. The temperature sensor input is connected as shown

in the wiring diagrams.

Alarm Types

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

when the temperature exceeds the trip point. The relay resets

when the temperature drops below the 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 trip point. The relay resets when

the temperature exceeds the 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 for connections. APD modules 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 installed.

The APD 1401 operates two sets of relays in unison with a

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

configuration.

The APD 1421 operates two sets of relays independently,

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

a Form C configuration.

Module Power

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.

Relay Operation

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

ber label for relay configuration option codes.

Set Point

This multi-turn potentiometer (one for each alarm on the APD

1421) 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.

Reset Point

This multi-turn potentiometer (one for each alarm on the

APD 1421) allows the operator to adjust the level at which

the alarm resets. This control is adjustable from 0 to 100%

of the input range.

Sufficient deadband (difference between trip and reset point)

should be used to prevent chattering of the relays or false

trips when the process signal is unstable or changes rapidly.

Adjustments

Set the signal source to a reference that represents the de-

sired set point.

Adjust the set point potentiometer to the point at which the

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

Set the signal source to a reference that represents the

desired reset point.

Adjust the reset point potentiometer to the point at which the

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

Operate the signal source through the set and reset points to

confirm desired operation and adjust if necessary.

For the APD 1421, repeat the above procedure for the second

alarm.

Output Test Function

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

to their opposite state. 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 indication

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 bicolor 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

condition. 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 12

Power

SP 1

SP 2

 * Do not make connections to unused terminals!

Module Power

AC or DC +

AC or DC –

1220 American Way Libertyville, IL 60048

Phone:

800-942-0315

Fax: 800-949-7502

APD 1401, APD 1421

1 2 3 4

5 6 7 8

Wire terminal torque

0.5 Nm to 0.6 Nm

(4.4 to 5.3 in-lbs)

 * Do not make

connections to

unused terminals!

To maintain full isola-

tion avoid combining

power supplies in

common with input,

output, or unit power.

13 14

Form A Form B

Jumper

NO NO NC NC

2 & 3 for

Form C

operation

Form A Form B

Jumper

NO NO NC NC

6 & 7 for

Form C

operation

Relay Wiring APD 1401

Form A Form B

Jumper

NO NO NC NC

2 & 3 for

Form C

operation

Form A Form B

Jumper

NO NO NC NC

6 & 7 for

Form C

operation

Relay Wiring APD 1421

11 12

2 Wire RTD or Thermistor Input

11 12

4 Wire RTD Input

3 Wire RTD Input

Cu 60/75°C

conductors

14 AWG

max.

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