Leviton VerifEye A8911 Manuale utente

DI-002-A8911-20A

High Density Pulse Input Module

Cat. No. A8911

Installation and Operation Manual

WEB VERSION

TABLE OF CONTENTS

1 Overview ................................................................................................................1

1.1 Features and Speciﬁcations ..............................................................................1

2 Installation Checklist.............................................................................................2

3 Electrical Connections..........................................................................................3

3.1 Hardware Installation.........................................................................................3

4 Conﬁguration.........................................................................................................5

5 Operation................................................................................................................6

6 Troubleshooting ....................................................................................................7

7 Register Listing .....................................................................................................8

8 Register Functions..............................................................................................10

9 A8911-23 Firmware update .................................................................................11

10 Mechanical Drawings ........................................................................................13

11 Warranty and Contact Information....................................................................14

WEB VERSION

WARNING:

• TO AVOID FIRE, SHOCK OR DEATH; TURN OFF POWER at circuit breaker or fuse and test that the

power is off before installing product or servicing current transformers.

• TO AVOID FIRE, SHOCK OR DEATH; Look inside the meter and electrical panel for possible exposed

wire, broken wire, damaged components or loose connections.

• Make sure all tools used during installation have proper installation ratings.

• Installations should be done in accordance with local codes and current National Electric Code

requirements, and performed by trained, qualiﬁed professionals.

• Equipment used in a manner not speciﬁed by this document impairs the protection provided by

the equipment.

CAUTIONS:

• Verify the model number and electrical speciﬁcations of the device being installed to conﬁrm they are

appropriate for the intended electrical service (see Section 3).

• Consult local codes for any possible permits or inspections required before beginning electrical work.

• Ensure the conduit for the installation is ﬂexible and non-metallic. For outdoor applications conduit and

conduit ﬁttings must be rated UL Type 4X for outdoor enclosures. Failure to use the appropriate conduit

impairs the degree of equipment protection.

PRODUCT APPLICATION LIMITATION:

• Leviton products are not intended for use in critical applications such as nuclear facilities, human

implantable devices or life support. Leviton is not liable, in whole or in part, for any claims or damages

arising from such uses.

• Leviton strongly believes in continuous improvement, therefore we must reserve the right to change

speciﬁcations and product offerings without notice. Where possible, we will substitute products with

equivalent functionality when necessary.

NOTICE

This product is not intended for life safety applications.

Do not install this product in hazardous or classiﬁed locations.

The installer is responsible for conformance to all applicable codes.

WEB VERSION

1 OVERVIEW

The A8911-23 is designed for pulse counting applications where large number of pulse output devices need

to be connected to a Modbus network. The A8911-23 will count contact closures on 23 separate inputs

and store the totalized pulse count internally using non-volatile memory. The pulse count totals are then

read using the RS485/Modbus protocol. Applications include reading gas/water/electric meters in common

building areas for energy information and reporting purposes.

1.1 Features and Speciﬁcations

Processor Arm7, ﬁeld upgradeable ﬁrmware.

LED 23 input status LEDs (red), 2 Modbus TX/RX (yellow), 1 power/alive status. (green)

Protocols Modbus/RTU

Power Supply 9VDC to 30VDC, 200mA, Required (not included)

The unit is to be sourced by a NEC Class 2 power supply, or Listed ITE power

supply marked LPS and rated from 9 to 30Vdc, 200 mA minimum but not to

exceed 8A

Serial Port1RS-485 two wire, 19200 or 9600 baud. N81

Pulse Inputs123 independent pulse count inputs.

Intended for use with isolated dry contact outputs.

Pulse rate/width user selectable to 10hz, 50hz or 100hz. Pulse rate option: 10hz

minimum pulse width 50ms Pulse rate option: 50hz, minimum pulse width 10ms

Pulse rate option: 100hz, minimum pulse width 5ms

Contact closure threshold 100 to 2.5k user selectable

Pulse count values are stored in non-volatile memory.

Isolation2: Pulse inputs, power input and RS485 are non-isolated.

Environmental Pollution Degree 2, Altitude up to 2000M.

For indoor and outdoor use when used in an appropriate enclosure.

The A8911-23 must be mounted inside a NEMA rated electrical enclosure for safety

and isolation requirements.

North America: Indoor, temperature -30º - +70ºc, 0 - 95% humidity,

non-condensing3

Safety UL61010 Recognized3

File: E320540 (Model A8911-23)

EMC FCC CFR 47 Part 15, Class A

EN 61000, EN 61326

Size 4.13” x 3.39” x 1.18” (105mm x 86mm x 30mm)

Mass 3.7 oz (105 g)

1inputs are intended for low voltage NEC Class 2 or equivalent outputs.

2if the product is used in a manner not speciﬁed by the manufacture, the protection provided by the

equipment may be impaired.

3Devices manufactured before Nov 1, 2011 are rated to 0 ~ 50c, and are not UL recognized.

WEB VERSION

2 INSTALLATION CHECKLIST

The following components are required for a complete A8911-23 I/O module installation:

• A8911-23 I/O module

• Modbus/RTU master device such as an AcquiSuite™ A8812 server

• Pulse output meter

• Power supply: 24VDC typical. (9VDC to 30VDC ok)

• Wire. Typically 18 to 24 gauge 3 for pulse meter connection.

• 2 wire, twisted pair with shield for Modbus/RS485 connection. (Belden 1120A or equivalent)1

• Optional: Termination resistor (120 ohm) for long RS485 runs over 200ft.

1Wire connected to pulse meters inside high voltage panels should have an insulation rating in excess of

the service voltage. Consult a licensed electrician and local building codes for further requirements that

may apply.

WEB VERSION

3 ELECTRICAL CONNECTIONS

3.1 Hardware Installation

1. Mount the A8911-23 on a DIN-Rail or appropriate

mounting enclosure.

2. Attach the power supply to the input terminals on the

A8911-23 module.

3. Turn on the power supply. Conﬁrm the green Alive LED starts

blinking. Turn off the power to the module.

4. Attach the RS485 +, - and shield wires to the A8911-23 module.

Attach the other end of the RS485 line to the Modbus master

device, such as an AcquiSuite. Be careful to observer polarity on

both ends of the RS485 connection. RS485 wiring runs should be

limited to 4000 ft.

A9811-23

+9 to +30VDC

GND

RS485 Shield

RS485 -

RS485 +

P23

Power

Supply

Twisted Pair

Shielded

WEB VERSION

3 ELECTRICAL CONNECTIONS

5. Set the Modbus address dipswitches and baud rate dipswitch. For more information on the switch

options, see the section below for conﬁguration.

6. Turn on the power supply. Conﬁrm the green Alive LED starts blinking. Also check the RS485

yellow LEDs.

• If the yellow RX led is blinking, the A8911-23 is receiving Modbus trafﬁc on the RS485 port.

• If the yellow TX led is blinking, then the A8911-23 is receiving a Modbus query speciﬁcally addressed

to it and will respond to the query.

• If you are using an AcquiSuite Data Acquisition Server, the A9811-23 should appear in the Modbus

device list after about 2 minutes. Click on the device, and select “Conﬁgure” to give the A8911-23 a

logical name. This will allow the AcquiSuite to begin logging data for the device.

7. With the power disconnected, attach the pulse input lines to the pulse terminals. Each pulse input

should have a GND and a P# terminal. If the pulse output device is polarity sensitive, attach the pulse

– terminal to the A8911-23 GND terminal, and the pulse + terminal to the A8911-23 P# terminal. The

A8911-23 provides 3-5 volts on the P# terminal for sensing. The remote pulse output device must not

supply voltage to the terminals.

Wiring runs to pulse input terminals should be kept as short as possible. Wiring runs longer than 200

ft should be avoided. Wiring should avoid proximity to sources of electrical noise such as running in

parallel to electrical cable, and VFD systems.

8. Power up the A8911-23. The Input LEDs for each connected input should now blink. The input LED will

be on when the contacts are closed.

WARNING: After wiring the A8911-23, remove all scraps of wire or foil shield from the electrical

panel. This could be dangerous if wire scraps come into contact with high voltage wires.

WEB VERSION

4 CONFIGURATION

Modbus Address: Before the A8911-23 can be used, you must set the Modbus

address of the A8911-23. This address must be unique among all Modbus

devices in the system. The A8911-23 supports address 1 through 127.

Select an address and set the DIP switches to match.

The sum of the value of the switches is the address. In the example to the right,

address 52 is set by placing switch 4, 16 and 32 to the on position.

Note: 4 + 16 + 32 = 52

Baud Rate: This option sets the serial port speed for the RS485 port. Set this

option to [OFF] for 19200. Set the switch to [ON] for 9600 baud.

Modbus

Address

19200/9600

WEB VERSION

5 OPERATION

The device should power up and be ready in a few seconds. The LEDs should blink in the following manner.

• The green “Alive” LED should start to blink approximately once per second.

• The yellow RS485 TX and RX LEDs will blink for local Modbus activity.

• The red input status LEDs will blink when input contact closures are detected. Input status LEDs are

adjacent to the corresponding input screw terminals.

If the A8911-23 is attached to an AcquiSuite Data Acquisition Server, you will need to conﬁgure each pulse

input with a Name, Engineering Unit, and Multiplier.

WEB VERSION

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