Patton 378S User Manual

USER
MANUAL

MODEL 378S

Serial Scanning Switch

SALES OFFICE
[phone]
TECHNICAL SUPPORT
[phone]
http://www.patton.com

Part# 07M378S-B
Doc# 020011UB
Revised 4/20/93

1.0 WARRANTY INFORMATION

Patton Electronics warrants all Model 378S components to be
free from defects, and will--at our option--repair or replace the product
should it fail within one year from the first date of shipment.

This warranty is limited to defects in workmanship or materials,
and does not cover customer damage, abuse, or unauthorized modifi­cation. If this product fails or does not perform as warranted, your sole
recourse shall be repair or replacement as described above. Under no
condition shall Patton Electronics be liable for any damages incurred
by the use of this product. These damages include, but are not limited
to, the following: lost profits, lost savings, and incidental or consequen­tial damages arising from the use of or inability to use this product.
Patton Electronics specifically disclaims all other warranties,
expressed or implied, and the installation or use of this product shall
be deemed an acceptance of these terms by the user.

1.1 RADIO AND TV INTERFERENCE

The Model 378S generates and uses radio frequency energy, and
if not installed and used properly--that is, in strict accordance with the
manufacturer's instructions--may cause interference to radio and televi­sion reception. The Model 378S has been tested and found to comply
with the limits for a Class A computing device in accordance with the
specifications in Subpart J of Part 15 of FCC rules, which are designed
to provide reasonable protection from such interference in a commer­cial installation. However, there is no guarantee that interference will
not occur in a particular installation. If the Model 378S does cause
interference to radio or television reception, which can be determined
by disconnecting the RS-232 interface, the user is encouraged to try to
correct the interference by one or more of the following measures:
moving the computing equipment away from the receiver, re-orienting
the receiving antenna, and/or plugging the receiving equipment into a
different AC outlet (such that the computing equipment and receiver
are on different branches).

1.2 SERVICE

All warranty and non-warranty repairs must be returned freight
prepaid and insured to Patton Electronics. All returns must have a
Return Materials Authorization number on the outside of the shipping
container. This number may be obtained from Patton Electronics
Technical Service at [phone].

Packages received without an

RMA number will not be accepted.

Patton Electronics' technical staff is also available to answer any
questions that might arise concerning the installation or use of your
Model 378S. Technical Service hours: 8AM to 5PM EST, Monday

through Friday.

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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

• Lets 8 PCs share one serial printer or plotter

• Supports data rates to 19.2 Kbps on inputs and output

• Supports both hardware (CTS/DSR) and software (X-ON/X-OFF)
flow control

• Available with up to 1 Meg of RAM buffer

• Individual port LEDs show scanning progress and which port is

loading data

• Buffer status LEDs show amount of buffer currently being used

• Manual override lets you select a port and give it exclusive printer

access

• Variable time outs allow adjustment of waiting time between the

end of data downloading and the resumption of scanning

• Buffer clear button lets you erase the buffer's memory

2.2 DESCRIPTION

The Model 378S Serial Scanning Switch provides an easy way

for as many as eight PCs to share a single serial printer. Equipped
with up to 1Meg of buffer, the Model 378S scans all input ports once

every two seconds to see if any device is sending data. As soon as
the Model 378S locates a device sending data, it locks on to that
device and loads all its data to buffer. Then the Model 378S simulta­neously spools the data to the printer or plotter and resumes scanning.

The Model 378S allows input/output data rates to 19.2Kbps, and
supports both hardware (CTS/DSR) and software (X-ON/X-OFF) hand­shaking methods. Convenience features of the Model 378S include a
manual "step" button that overrides automatic scanning, and a master
buffer clear button. Two sets of LED indicators are provided: one set
shows which port is currently being scanned or loaded, the other set
shows the percentage of buffer space currently available.

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