2.0 GENERAL INFORMATION
Thank you for your purchase of this Patton Electronics product.
This product has been thoroughly inspected and tested and is
warranted for One Year parts and labor. If any questions or problems
arise during installation or use of this product, please do not hesitate to
contact Patton Electronics Technical Support at (301) 975-1007.
2.1 FEATURES
• Synchronous operation, full or half duplex
• Allows an RS-232 DCE to communicate bi-directionally with a
V.35 DTE
• Allows an RS-232 DTE to communicate bi-directionally with a
V.35 DCE
• Data rates up to
384 kbps
• DCE/DTE strap selectable
• Front panel LED indicators monitor seven parameters
• Dual UD-26 Connectors on rear card
• Fits in Patton’s rack chassis and Cluster Boxes
• Made in the USA
2.2 DESCRIPTION
The Patton Model 2020RC
Interface Converter Rack Card lets a
synchronous RS-232 device communicate bi-directionally with a
synchronous V.35 device. Operating full or half duplex, the Model
2020RC is protocol independent and supports data rates to 384 kbps.
An internal DCE/DTE strap allows the user to configure the Model
2020RC as "DCE to DTE" or "DTE to DCE". In most cases, this
eliminates the need for special crossover cables. The Model 2020RC
uses Patton’s mid-plane architecture and is equipped with dual UD-26
connectors on the rear interface card (adapter cables are available from
Patton Electronics).
The Model 2020RC is designed to mount in Patton’s 2U high 19”
rack chassis and 2/4/8 slot Cluster Boxes. Available power supplies
include 120/230V AC and 48/24/12V DC. The Model 2020RC is made
in the USA.
3
3.0 CONFIGURATION
This section describes the location and orientation of the Model
2020RC's configuration straps, and details all possible settings. This
section also identifies factory default configuration settings.
3.1 FRONT CARD CONFIGURATION
The Model 2020RC installs between DTE devices such as terminals
and host computers, and DCE devices such as modems, multiplexers
and CSU/DSUs. Most often the DTE device will be RS-232, and the
DCE device will be V.35. Therefore,
the default DCE/DTE setting for
the Model 2020RC is RS-232 DCE to V.35 DTE
, based on how the
Model 2020RC "sees" its
own
orientation. For example, if the Model
2020RC sees its own RS-232 port as DCE, it will want to plug into an
RS-232 DTE device such as a terminal.
The DCE/DTE strap is located near the rear of the Model 2020RC
front card’s PC board (see Figure 1, below). The arrows on the strap,
and on the PC board itself, indicate the configuration of the Model
2020RC. For example, if the “DCE” arrows on the strap are pointing
toward the front of the card (with the “DTE” arrows pointing toward the
rear), then the Model 2020RC is wired so that the RS-232 port is a DCE
and the V.35 port is a DTE. You can confirm this by reading the “RS-
232” and “V.35” arrows on the PC board.
To reverse the DCE/DTE orientation of the Model 2020RC, remove the
strap and rotate it 180
0
. Confirm the orientation by checking the arrows
on the strap and on the PC board.
Figure 1.
Model 2020RC front card, showing location of the DCE/DTE strap.
RS-232
V.
3
5
4
DCE/DTE strap
DTE
➨
➨
➨
➨
