Rockwell Automation 20-XCOMM-DC-BASE User Manual

DPI External Communications Kit

Installation Instructions

These Installation Instructions are provided with the DPI
External Comms Kit. This document explains how to install
a communications adapter (sold separately) into the kit,
mount the kit in an enclosure, and connect the required
cables.

These instructions also describe the accessory AC Power
Adapter. See AC Power Adapter (20-XCOMM-AC-PS1)

page 3 for details.

External Comms Kit (20-XCOMM-DC-BASE)

Compatability

This kit is for use with only the following Allen-Bradley
communication adapters (sold separately):

• 20-COMM-E EtherNet/IP

• 20-COMM-C ControlNet (coax)

• 20-COMM-Q ControlNet (fiber)

• 20-COMM-D DeviceNet (Series B or later)

• 20-COMM-B BACnet MS/TP

• 20-COMM-M Modbus/TCP

The DPI External Comms Kit is typically used to provide an
additional network connection for a drive that already has a
20-COMM-* installed inside. For example, one network
may be used for control and a second network may be used
for configuration and data collection.

Installing the Communications Adapter

ATTENTION: Risk of equipment damage exists.
The communications adapter contains ESD

!

(Electrostatic Discharge) sensitive parts that can be
damaged if you do not follow ESD control
procedures. Static control precautions are required
when handling the adapter. If you are unfamiliar with
static control procedures, refer to Guarding Against
Electrostatic Damage, Publication 8000-4.5.2.

on

3. Fasten the communication adapter into the enclosure

cover by using the adapter’s captive screws (Figure 1
This also grounds the adapter.

4. The communication adapter is supplied with two Internal

Interface (ribbon) cables. Use only the longer 15.24 cm
(6 in.) Internal Interface cable. Plug one end of the cable
into the mating connector on the power supply board in
the base of the Comms Kit enclosure.

Figure 1 Mounting and Connecting the Adapter

Comms Kit

Enclosure Base

5. Plug the other end of the Internal Interface cable into the

mating connector on the communication adapter.

6. If using an Allen-Bradley I/O Board option (20-

XCOMM-IO-OPT*) with the External Comms Kit,
install the I/O board into the kit at this time. For details,
see the I/O Board Installation Instructions provided with
the board. Otherwise, fasten the enclosure cover onto the
base using the two screws in the cover.

Mounting the External Comms Kit

Comms Kit Enclosure Cover

(with adapter mounted inside)

Internal Interface Cable
(connects power supply board
in enclosure base to adapter)

).

1. Before you install the communication adapter into the

Comms Kit, make sure to configure all of the adapter’s
switches and/or jumpers, if applicable, to appropriate
settings. Refer to the Communication Adapter User
Manual for details.

2. Remove the Comms Kit enclosure cover from the base

by unfastening its two screws.

ATTENTION: Risk of equipment damage exists.
During panel or DIN rail mounting, be sure to

!

prevent any debris (metal chips, wire strands, etc.)
from falling into the Comms Kit. Debris that falls
into the kit could cause damage on power up.

Panel or DIN rail mount the Comms Kit before connecting
the adapter to the network and drive.

Minimum Spacing

+

External Comms Kits can be zero-stacked (side-by-side
mounting). Allow 75 mm (3 in.) of space on the bottom of the
enclosure for cable entry. Allow at least 75 mm (3.2 in.) of
enclosure clearance depth to accommodate the Comms Kit.

Panel Mounting Using the Dimensional Drawing

Mount the Comms Kit to a panel using two M4 or #8
panhead screws (not included). Figure 2
dimensions.

Figure 2 Panel Mounting Dimensions

shows mounting

Figure 3 DIN Rail Mounting

∅

4

(0.16)

85,3

(3.36)

96,3

(3.79)

PORT

MOD

NET A

NET B

mm

(in.)

Panel Mounting Procedure Using Comms Kit as a Template

The following procedure enables you to use the assembled
Comms Kit as a template for drilling holes in the panel.

1. Using the assembled Comms Kit as a template, carefully

mark the center of both holes on the panel.

2. Remove the Comms Kit to a clean location.

Electrical Connections

ATTENTION: Risk of equipment damage, injury
or death exists. Unpredictable operation may occur

!

if you fail to verify that parameter settings and
switch settings are compatible with your
application. Verify that settings are compatible
with your application before applying power to the
drive.

After the communication adapter (and I/O Board option, if
used) is installed and the Comms Kit is mounted, connect all
required cables. See Figure 4
the connectors and their connection procedures.

Figure 4 Connecting to the Comms Kit

and its related table showing

➊➋

3. Drill and tap the mounting holes for the recommended

M4 or #8 panhead screws (not included).

4. Place the Comms Kit back on the panel, and check for

proper hole alignment.

5. Attach the Comms Kit to the panel using the mounting

screws.

DIN Rail Mounting

The Comms Kit can be mounted using these DIN rails:

• 35 x 7.5 mm (EN 50 022 - 35 x 7.5)

• 35 x 15 mm (EN 50 022 - 35 x 15)

Before mounting the Comms Kit on a DIN rail, open the
DIN rail latch. Press the DIN rail mounting area of the
Comms Kit against the DIN rail, and manually lock the DIN
rail latch (Figure 3

).

DPI

➎

Item Description Connection Procedure

Network

➊

Connector

Optional I/O

➋

Terminal Block

2

Connection for the network. Insert the network
cable plug into the mating connector on the
communications adapter.

See the I/O Board option (20-XCOMM-IO­OPT*) Installation Instructions for details.

➍

DC

ADP

-

+

-

DC

➌

Item Description Connection Procedure

24 VDC

➌

Powe r Term inal

(1)

Block

AC-to-DC

➍

Adapter

Connector

DPI Connector Connection for DPI. Using a 1202-Cxx

➎

(1)

The DC power source or AC-to-DC converter used to power the Comms Kit must
be capable of providing a minimum of 150 mA @ 18-27 VDC. Also, its connector
must be of “pin and barrel” construction with a 2 mm pin.

(2)

To power multiple Comms Kits, see Powering Daisy-Chained Comms Kits on

page 4.

Connection for 24 VDC (+15% / -25%) power
source. Connect the “ + ” and “ - ” wires of the
DC power source to the 2-pin linear plug
(provided with Comms Kit), matching the
respective polarity. Then insert the 2-pin linear
plug into the mating DC power terminal block.
NOTE: When powering the Comms Kit with the
accessory 20-XCOMM-AC-PS1 power adapter,
this terminal block can be used to daisy-chain
24 VDC to other kits (Figure 5

Connection for AC-to-DC adapter, such as
Allen-Bradley 20-XCOMM-AC-PS1, when not

(1)(2)

using a DC power source. Plug the adapter into
the mating DC ADP connector.

+

Communications Cable, connect one end into the
mating DPI connector of the Comms Kit and the
other end into the port on the bottom of the drive.

-

).

Configuring the Communications Adapter

After mounting and connecting the Comms Kit, configure
the communication adapter. Refer to the communication
adapter User Manual for complete details.

External Comms Kit Specifications

Communications

Network Dependent on installed 20-COMM-* adapter

Drive

Protocol
Data Rates

Electrical

Drive 60 mA at 12 VDC supplied from drive via DPI cable

Network None for all network protocols except:

DC Power Supply

Requirement

(1)

Since the Comms Kit is powered by a nominal 24 VDC, the current consumption
listed in this table differs from the value shown on the label of the communication
adapter, which is based on the adapter being powered by 5 VDC from the drive.

DPI
125 kbps or 500 kbps

20-COMM-B 75 mA at 24 VDC

(1)

20-COMM-C 105 mA at 24 VDC
20-COMM-D 60 mA at 24 VDC
20-COMM-E 140 mA at 24 VDC
20-COMM-Q 135 mA at 24 VDC
20-COMM-M 140 mA at 24 VDC

DeviceNet 60 mA at 24 VDC

Mechanical

Dimensions

Width
Height
Depth

Weight 340 g (12 oz.)

Environmental

Temperature

Operating
Storage

Relative Humidity 5 to 95% non-condensing

Atmosphere Important: The Comms Kit must not be installed in

Shock

Operational

Non-operational

Vibration

Operational
Non-operational

Regulatory Compliance

UL UL508C

CUL CAN / CSA C22.2 No. 14-M91

CE EN50178 and EN61800-3

CTick EN61800-3

NOTE: In order to remain CE and CTick compliant, the
DPI cable length may not exceed 30 m (98.4 ft.).

NOTE: This is a product of category C3 according to IEC
61800-3. It is not intended for operation in a domestic
environment.

108 mm (4.25 in.)
108 mm (4.25 in.) with I/O terminal block attached
75 mm (2.95 in.)

-10 to 50° (14 to 122° F)

-40 to 85° (-40 to 185° F)

an area where the ambient atmosphere contains
volatile or corrosive gas, vapors or dust. If the
Comms Kit is not going to be installed for a period of
time, it must be stored in an area where it will not be
exposed to a corrosive atmosphere.

30g, 11 ms (DIN Rail Mount)
50g, 11 ms (Panel Mount)
30g, 11 ms (DIN Rail Mount)
50g, 11 ms (Panel Mount)

2.5g, 5 to 2000 Hz

5.0g, 5 to 2000 Hz

AC Power Adapter (20-XCOMM-AC-PS1)

The 20-XCOMM-AC-PS1 is an accessory AC-to-DC
converter for use with the External Comms Kit. It is used
when only 100-240 VAC power is available inside a control
panel. The converter, which comes with interchangeable
plugs, is shown below. The converter connects to an AC
receptacle inside the control panel. Use the appropriate plug
for your region:

For use in

the US

For use in

the UK

3

For use in
Europe

For use in
Australia

A

A

Electrical Connections

Powering a Single Comms Kit

The DC output plug is connected to the mating DC ADP
connector on the 20-XCOMM-DC-BASE.

Powering Daisy-Chained Comms Kits

Additional Comms Kits can be powered by daisy-chaining
them together. For each Comms Kit in the chain, connect all
DC “+” terminals together and all DC “-” terminals together
(Figure 5

Figure 5 Powering Multiple Comms Kits via Daisy Chaining

).

TIP: It is highly recommended to use twisted wire
pairs for better noise immunity.

Comms Kits

(20-XCOMM-DC-BASE)

+

-

+

-

+

-

. . .

AC-to-DC Converter

(20-XCOMM-AC-PS1)

+

-

The following two examples explain how to determine the
number of daisy-chained Comms Kits that can be powered:

Example 1:

each have an installed 20-COMM-E EtherNet/IP adapter
and I/O Board option, and that the kits will be powered by
the 20-XCOMM-AC-PS1 converter which has an output
capacity of 830 mA.

Since the current consumed by one Comms Kit is 200 mA
(140 mA for the 20-COMM-E plus 60 mA for the I/O
board), divide the power source’s available output capacity
by this consumption (830 mA ÷
down the result. For this example, 4 daisy-chained Comms
Kits can be powered.

Example 2:

each have an installed 20-COMM-C ControlNet adapter, and
that the kits will be powered by the 20-XCOMM-AC-PS1
converter which has an output capacity of 830 mA.

Since the current consumed by one Comms Kit is 105 mA,
divide the power source’s available output capacity by this
consumption (830 mA ÷
the result. For this example, 7 daisy-chained Comms Kits
can be powered.

Suppose the Comms Kits being daisy-chained

200 mA = 4.15), and round

TIP: When using the DC power source to also power
the additional I/O, subtract the required I/O current
from the power source capacity before making the
calculation.

Suppose the Comms Kits being daisy-chained

105 mA = 7.90), and round down

AC Power Adapter Specifications

The number of Comms Kits that can be daisy-chained
together is dependent on:

• Total current consumed by all of the communication

adapters being daisy-chained. For adapter current
consumptions at 24 VDC, see DC Power Supply

Requirement on page 3.

• Whether or not an I/O Board option is installed. If it is,

the I/O Board consumes 60 mA @ 24VDC.

• Available current output capacity of the AC-to-DC

converter being used.

U.S. Allen-Bradley Drives Technical Support - Tel: [phone], Fax: [phone], Email: [e-mail], Online: www.ab.com/support/abdrives

Input

Rated Input Voltage
Operating Input Voltage
AC Input Frequency

Output

Output Voltage
Output Current

100 - 240 VAC
90 - 264 VAC
47 - 63 Hz

24 VDC
830 mA

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Publication 20COMM-IN001D-EN-P – May 2007 P/N 319869-P04

Supersedes 20COMM-IN001C-EN-P – July 2006 Copyright © 2007 Rockwell Automation, Inc. All rights reserved. Printed in USA.