Danfoss vacon optbk User guide

vacon

ac drives

optbk

as-interface option board

user manual

®

vacon • 1

INDEX

Document code(Original Instructions): DPD01311B

Revision release date: 22.5.15

1. OPTBK AS-interface board................................................................................2

1.1 General................................................................................................................................2

1.2 Technical data .....................................................................................................................2

1.2.1 AS-interface technical data ................................................................................................3

1.2.2 AS-i board layout and connections .....................................................................................4

1.2.3 Physical media ....................................................................................................................5

1.2.4 LED indications ...................................................................................................................6

2. Option board installation ..................................................................................7

2.1 Vacon 100 ............................................................................................................................7

2.2 Vacon 100 X .......................................................................................................................10

2.3 Vacon 20 X .........................................................................................................................14

Rev. B

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vacon • 2 OPTBK AS-interface board

1. OPTBK AS-INTERFACE BOARD

1.1 General

The Actuator sensor Interface (AS-Interface or AS-i) is an economical system for the lower auto­mation level. It is not a universal Fieldbus for all areas of automation. The AS-Interface is optimized
to network binary sensors and actuators to the higher control level.

The AS-Interface is an intelligent form of cabling rather than a true fieldbus. It does not replace
complex networks. Because the system has simple and cost-effective solutions, it suits well for the
Sensor/Actuator Level. The cost-effective, rugged AS-Interface components are especially suited
for use in harsh industrial environments. AS-i products are certified by the AS-International user
organization that guarantees worldwide compatibility. Vacon is AS-International member since
January 2013.

The installation of AS-interface is both easy and cost-effective. Because the AS-interface is a sim­ple, defined electromechanical interface, no special expertise is necessary in the installation. It has
a quick "Snap and Go" cable penetration system. The installation is easy because the AS-interface
has freely selectable network topology. Also the configuration is easy. Only some prior knowlegde
is necessary for the assembly, which reduces downtime when faults occur.

The fault susceptibility of other systems often results in assembly delays, so the AS-Interface was
consciously designed to reduce error sources. The special profile of the AS-Interface cable pre­vents reversal of the poles when connecting devices.

1.2 Technical data

VACON® AC drives can be connected to the ASI bus system using a OPTBK AS-I board.

Internal components and circuit boards are at high potential when the AC drive is
connected to the power source. This voltage is extremely dangerous
and may cause death or severe injury if you come into contact with it.

The relay outputs and other I/O-terminals may have a dangerous control voltage
present even when the AC drive is disconnected from mains.

It is not allowed to add or replace option boards on an AC drive with
the power switched on. This may damage the boards.

NOTE! When experiencing problems with AS-I functionalities, please contact Fieldbus@va­con.com.

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OPTBK AS-interface board vacon • 3

1.2.1 AS-interface technical data

Master/Slave Communication System
AS-Interface profile S-7.A.7 (AS-i specifications 3.0)

Network type:

Topolo gy: Very flexible with Line, Bus, Star or Tree Topology

Installation:

Max. current
consumption:

Data Rate: 167 kBit/s
Max. Stations: 1 Master and up to 62 Slaves
Data: each Slave: - 4 bit digital Input and 4 bit digital Output Data

Network Features:

User Organization: AS-International

IO code 7
ID code A
ID1 code 7
ID2 code 7

Special (yellow) unshielded cable with 2 wires providing data and 30 V.
Alternatively data and power on separate cables 100 m length per
Segment, extendible up to 300 m with Repeaters

150 mA

Data values become refreshed at the slave in less than 21 ms; all 4
output bits operate simultaneously

Table 1. AS-interface technical data

The AS-interface is a simple master-to-slave structure. The master controls all time and network
traffic. The protocol is embedded in the hardware. There are no configuration files to maintain. All
nodes are “AB Slaves”. The slaves have a maximum of 4 discrete input bits and 4 discrete output
bits. The address range is 1A-31A and 1B-31B, with 0 being reserved for new incoming slaves. “0”
is the default address set by manufacturers when a slave leaves the factory.

The board can be configured with the bits as the following table:

Parameter bits

Communication monitoring (Watchdog)
P0 = 0 monitoring = off, the outputs maintain the status if communi-

P0

P1

P2

P3 Not used

cation fails (default setting)
P0 = 1 monitoring = on, i.e. if communication fails, the outputs are
deenergised

Input filter
P1 = 0 input filter on, pulse suppression (default setting)
P1 = 1 input filter off

Synchronous mode
P2 = 0 synchronous mode on (default setting)
P2 = 1 synchronous mode off

Table 2. Description of parameter bit function.

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vacon • 4 OPTBK AS-interface board

1.2.2 AS-i board layout and connections

Both data and power are supplied on the two-wire cable. The DC power carries the AS-interface sig­nal. The AS-interface signal and the voltage regulating circuitry of the power supply must be sep­arated.

Do not ground the AS-interface negative (ASI N). Grounding the signal lines results in poor commu­nication or completely lost communication. The typical AS-interface media is not shielded. If shield­ing is necessary for the application, ground the shield in only one place.

The AS-interface power supply provides voltages in the 30VDC range (29.5-31.6 VDC). It is higher
than the industry standard nominal 24VDC to compensate for the voltage drop on the line as well
as the drop through the AS-interface IC chip.

Figure 1. OPTBK AS-interface option board.

OPTBK AS-interface terminals

Terminal Signal Technical information

1 ASI P AS-interface +

2 ASI N AS-interface -

ASI Supply P

3

ASI Supply N GND of Auxiliary output voltage

4

Table 3. OPTBK AS-Interface terminals

Auxiliary output voltage (ASi voltage input - max 2.4V at
maximum output current)

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