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Installation Instructions
Coax Transceiver for 10BASE2
1785-TR10B2
The mini coax transceive r enables a devi ce with an AUI int erface to connec t
to a 10 Mbit/s CSMA/CD LAN (ISO/IEC 8802-3, IEEE 802.3, 10BASE2)
via a coaxial cable.
•
Monitoring LEDs for
– power
– collision/jabb er control
– data
•
SQE test can be disabled
externally
•
Can be plugged directly to the device interface
•
Low current consumption
•
Compact construction
To the Installer
Topic Pa ge
Description 2
Installation 2
Compliance to European Union Directives 4
Technical Data 7
1785-5.18 - January 1999
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2 Coax Transceiver for 10BASE2
Description
The 1785-TR10B2 mini coax transceiver can be connected to the AUI
interface of a device either directly or via an AUI cable. It is connected to
the coaxial cable by a BNC socket. The mini coax transceiver offers these
functions according to IEEE 802.3 10BASE2:
•
indication via a LED of data transmission and reception through the
coaxial cable
•
detection of data collisions in the network and reporting them to the
terminal equipment as well as indicating them by a LED
•
Jabber control and di splay: p rotecti ng the ne twork from dat a packets that
are too long (> 25 ms)
•
ability to enable/disable the SQE test: at the end of every transmit
operation, a short collis ion signal ( heart beat) app rox. 1 µs long is sent to
monitor the electronics
Tx
Tx-Packet
Detect
ENABLE/
DISABLE
DO
Installation
Jabber
Protect
BNC interface
(to 10BASE2)
Collision
Detector
Rx
SQE-Test
GeneratorGenerator
Collision
Oscillator
Rx-Data
CI
AUI interface
(15-pole SUB-D connector)
DI
Coaxial Cable Connection
1. Cut off the coax cable (10BASE2) at the connection point.
2. Apply BNC connectors to both ends of the cable.
3. Put the two ends tog ether vi a a BNC-T-adapter , which you co nnect to the
BNC socket of the transceivers.
4. When connecting to the end of a coax cable, apply a BNC terminator
(50
Ω) to the unused socket of the T-adapter.
1785-5.18 - January 1999
Important:The minimum distance between two transceivers along a coax
cable is 0.5 m.
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Coax Transceiver for 10BASE2 3
Power Supply
The operating voltage (+12 V) is taken from the connected device via the
15-pin sub-D socket of the AUI interface.
SQE Test Setting
The slide switch loca ted on the top of the tr ansceiver case is use d to acti vate
and deactivate the SQE t est. Before pl acing the tr ansceiver in operation, you
should check to see whether the connected device requires the SQE test to
be on or off. As delivered from the factory, the SQE test is on.
Connecting Devices
Connecting two devices
Connecting more than two devices
Ter mi na tor
PC
1785-TR10B2
PC
* The maximum length is valid between the PC and the terminator.
For Additional Information
Terminator
10BASE2 (max. 185 m *)
BNC-T-Adapter
* The maximum length is valid between the PC and the terminator.
Terminator
10BASE2 (max. 185 m *)
1785-TR10B2
min. 0.5 m
BNC-T-Adapter
PLC5E
PLC5E
PLC5E
For standards information, go to
copy of this publication, go to
http://www.theautomationbookstore.com/.
http://www.ieee.org/. To download a .PDF
1785-5.18 - January 1999
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4 Coax Transceiver for 10BASE2
Compliance to European Union Directives
If this product has the marking, it is approved for installation within the
European Union and EEA regions. It has been designed and tested to meet
the following directives.
EMC Directive
This product is tested to meet Council Directive 89/336/EEC
Electromagnetic Compatibility (EMC) and the following standard s, in
whole or in part, documented in a technical construction file:
•
EN 50081-2 EMC - Generic Emission Standard,
Part 2 - Industrial Environment
•
EN 50082-2 EMC - Generic Immunity Standard,
Part 2 - Industrial Environment
This product is intended for use in an industrial environment.
Low Voltage Directive
This product is tested to meet Council Directive 73/23/EEC Low Voltage,
by applying the safe ty req uir ements of EN 609 50 - In form ation Technology
Equipment.
For specific informat ion requi red by EN 60950 , see the ap propriat e section s
in this publication, as well as the following Allen-Bradley publicati ons:
•
Industrial Automation Wiring and Grounding Guidelines for Noise
Immunity, publication 1770-4.1
•
Automation Systems Catalog, publication B111
1785-5.18 - January 1999
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Coax Transceiver for 10BASE2 5
Hazardous Location Approval
This product may be certified for general use as well as for use in hazardous locations. Actual agency
certification is indicated by the product label as shown below, and not by statements in any user
documentation.
Example of the certification product label:
CL I, DIV 2
GP A,B,C,D
TEMP
To comply with certification for use in hazardous locations, the following information becomes a part of the
product literature for this certified industrial control product.
• This equipment is suitable for use in Class I, Division 2, Groups A, B, C, D, or non-hazardous locations only.
• The products having the appropriate markings (that is, Class I, Division 2, Groups A, B, C, D) are certified for
use in other equipment where the suitability of combination (that is, application or use) is determined by the
local authority having jurisdiction.
Important: Due to the modular nature of a programmable control system, the product with the highest
temperature rating determines the overall temperature code rating of a programmable control system in a Class I,
Division 2, location. The temperature code rating is marked on the product label as shown.
Temperature code rating:
CL I, DIV 2
GP A,B,C,D
TEMP
/RRNIRUWHPSHUDWXUH
FRGHUDWLQJKHUH
The following warnings apply to products having certification for use in hazardous locations.
ATTENTION: Explosion hazard -
• Substitution of components may impair suitability for Class I, Division 2.
!
• Do not replace components unless power has been switched off or the area is known to be
non-hazardous.
• Do not disconnect equipment unless power has been switched off or the area is known to be
non-hazardous.
• Do not disconnect connectors unless power has been switched off or the area is known to be
non-hazardous. Secure any user-supplied connectors that mate to external circuits on this
equipment by using screws, sliding latches, threaded connectors, or other means such that
any connection can withstand a 15 Newton (3.4 lb.) separating force applied for a minimum of
one minute.
1785-5.18 - January 1999
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6 Coax Transceiver for 10BASE2
Approbation d’utilisation en environnements dangereux
Ce produit est certifié pour une utilisation générale aussi bien que pour une utilisation en environnements
dangereux. La certification en vigueur est indiquée par l'étiquette produit et non par des indications dans la
documentation utilisateur.
Exemple d'étiquette de certification d'un produit :
Pour satisfaire à la certification en environnements dangereux, les informations suivantes font partie intégrante de
la documentation des produits de commande industrielle certifiés.
• Cet équipement ne convient qu’à une utilisation en environnements de Classe 1, Division 2, Groupes A, B, C, D,
ou non dangereux.
• Les produits portant le marquage approprié (c'est-à-dire, Classe 1, Division 2, Groupes A, B, C, D) sont
certifiés pour une utilisation avec d'autres équipements, les combinaisons d’applications et d’utilisation étant
déterminées par le bureau local d'inspection qualifié.
CL I, DIV 2
GP A,B,C,D
TEMP
Important : De par la nature modulaire des systèmes de commande programmables, le produit ayant le code de
température le plus élevé détermine le code de température global du système dans un environnement de
Classe 1, Division 2. Le code de température est indiqué sur l'étiquette produit.
Code de température
:
CL I, DIV 2
GP A,B,C,D
TEMP
Le code de température
est indiqué ici
Les avertissements suivants s'appliquent aux produits certifiés pour une utilisation en environnements dangereux.
DANGER : Risque d’explosion
• La substitution de composants peut rendre cet équipement inadapté à une utilisation en
!
environnement de Classe 1, Division 2.
• Couper le courant ou s’assurer que l’environnement est classé non dangereux avant de
remplacer des composants.
• Couper le courant ou s’assurer que l’environnement est classé non dangereux avant de
débrancher l’équipement.
• Couper le courant ou s’assurer que l’environnement est classé non dangereux avant de
débrancher les connecteurs. Fixer tous les connecteurs fournis par l’utilisateur pour se
brancher aux circuits externes de cet équipement à l’aide de vis, loquets coulissants,
connecteurs filetés ou autres, de sorte que les connexions résistent à une force de séparation
de 15 newtons (1,5 kg - 3,4 lb) appliquée pendant au moins une minute.
1785-5.18 - January 1999
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Coax Transceiver for 10BASE2 7
Technical Data
Operating voltage +12 V
Current consumption (no signal) 2 50 mA
Bit rate (Manchester Code) 10 Mbit/s
Coaxial cable interface: Transmitter
AC
DC
Rise/fall time
Harmonic components:
1st harmonic
2nd harmonic
3rd harmonic
4th harmonic
5th harmonic
6th harmonic
7th harmonic and higher
Preamble loss transmit ≤ 2 bit
Stady State Delay 15 ns
Jabber protect time out 25 ms
Jabber reset 500 ms
Coaxial cable interface: Receiver
Coaxial cable Input current 5 µA
Capacitive load 2 pF
Input resistance > 100 kΩ
Noise suppression –250 mV
Preamble loss receive 1 bit (max. 3 bit)
Steady State Delay 10 ns
Collision Detect threshold –1.6 V
Transceiver interface (AUI)
Input:
Terminating resistance
Sensitivity
Maximum DC component
Output:
Output voltage
(data and CD signal)
CD signal frequency
SQE Test (heart beat)
delay time
length
AUI cable length
Connections with pin assignments
Transceiver interface
(15-pin sub-D plug)
Coaxial cable interface
1.9 V +0.35 V, –0.5 V
–1.025 V ±0.1 V
25 ns ±20%
–34 dB
–23 dB
–40 dB
–39 dB
–40 dB
–47 dB
–55 dB
78 Ω ±1%
500 mVPP
± 50 V
1.6 VPP
10 MHz ± 10%
can be disabled
1100 ns
1000 ns
0 to 50 m max.
Input: DO-A: Pin 3; DO-B: Pin 10
Output: DI-A: Pin 5; DI-B: Pin 12
Collision detect:CI-A: Pin 2; CI-B: Pin 9
Power: GND: Pin 6; +12 V: Pin 13
Shielding: Pin 1, 4, 8, 11, 14
1 BNC socket
1785-5.18 - January 1999
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Connection capabilities
Transceiver interface
plugged directly onto the AUI interface of connected
device or connected by an AUI cable (50 m max. length)
Coaxial cable interface
with BNC-T-adapter (please order separately) onto coax
segment 10BASE2
Displays
* yellow LED: DA (Data)
on – data being transmitted or received
* red LED: CD (Collision Detect)
brief flash – data collision
continuously on – jabber control active
* green LED: P (power)
on – supply voltage present
Dimensions W x H x D 44 mm x 22 mm x 100 mm (1.8 in. x .83 in. x 3.9 in.)
Weight 130 g
Ambient temperature 0° C to +50° C
Storage temperature –20° C to +80° C
Relative humidity 10 % to 90 % (non-condensing)
Conductors/Wire Size/Category
Agency Certification
(when product is marked)
Category 2
CUS
1
• Information Technology Equipment
• Industrial Control Equipment
• Class I, Div. 2, Groups A, B. C, D
Hazardous Location
• EN 50082-1, 2
• EN 55022, Radiated Emission Class B
• EN 60950
FCC Part 15, SubPart B
1
Refer to the Industrial Automation Wiring and Grounding Guidelines for Noise Immunity, publication 1770-4.1.
Publication 1785-5.18 - January 1999 PN 955134-72
Copyright 1999 of Rockwell International Corporation. Printed in the U.S.A.
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