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
• Bi-directional RS-232 to 20mA current loop conversion
• 2 Independent interface converters per card
• Full duplex, asynchronous transmission over two twisted pairs
• Switch selectable active/passive transmitter
• Optical Isolation and Surge Suppression
• Front Panel LED indicators for TD, RD and power
• Selectable receiver impedance
• Made in the USA
2.2 DESCRIPTION
The Patton Model 2017RC
Interface Converter Rack Card is a
dual rack card that lets two asynchronous RS-232 devices
communicate bi-directionally with two asynchronous 20mA current loop
devices. Operating full duplex on both ports, the Model 2017RC
supports data rates to 115.2 kbps.
Internal active/passive switches allow the user to configure the
Model 2017RC with an active or passive transmitter. This unique
feature allows configuration to fit a wide variety of current loop
applications. The Model 2017RC uses Patton’s mid-plane architecture
and is equipped with dual RJ-45 connectors on the rear interface card
(adapter cables are available from Patton Electronics).
The Model 2017RC is designed to mount in Patton’s 2U high 19”
rack chassis and 2/4/8 slot Cluster Boxes. The combination of rack
mount, Cluster Box and interface powered units provides a completely
integrated “networking” solution. The Model 2017RC is made in the
USA.
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3.0 CONFIGURATION
This section describes the location and orientation of the Model
2017RC's configuration straps, and details all possible settings. This
section also identifies factory default configuration settings.
3.1 FRONT CARD CONFIGURATION
The Model 2017RC uses one switch and one jumper per port that
allow configuration to a wide range of asynchronous applications.
These switches and jumpers are accessible when the card is slid out of
the rack chassis. Figure 1 shows the switches and jumpers on the
position of the Model 2017RC PC board.
3.1.1 Active/Passive Configuration
In any closed current loop, the transmitter
or
the receiver acts as
the active current source, while the other of the two must be passive.
To configure the Model 2017RC active/passive modes, you must first
determine whether the transmitter should be active or passive.
The active/passive switches are used to control the mode of the
20mA transmitters. Each converter on the dual port card has one
switch. As Figure 2 shows, the switch controls the mode of the
transmitter.
The Model 2017RC receivers are always passive.
WARNING: Never
connect two active devices together. Your
configurations
must
be "active to passive" or "passive to active".
Figure 1.
Model 2017RC front card, showing location of the Switches and Jumpers
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Active/PassiveSwitch
- Port A
Active/PassiveSwitch
- Port B
JB1
JB2
1
2
3
1
2
3
N
L
N
L
