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Flin- HEWLETT
a:~ PACKARD
HP 27128A
Asynchronous Serial Interface (ASI)
Installation Manual
Card Assembly: 27128-60001
Date Code: A-2218
Manual Part Number 27128-90001
Printing History
First Edition ............... September 1982
Notice
The information contained in this document is subject to change
without notice.
HEWLETT-PACKARD MAKES NO WARRANTY OF ANY KIND
WITH REGARD TO THIS MATERIAL, INCLUDING, BUT NOT LI-
MITED TO, THE IMPLIED WARRANTIES OF MERCHANTABIL-
ITY AND FITNESS FOR A PARTICULAR PURPOSE. Hewlett-
Packard shall not be liable for errors contained herein or for inciden-
tal or consequential damages in connection with the furnishing, per-
formance, or use of this manual.
This document contains proprietary information which is protected
by copyright. All rights are reserved. No part of this document may
be photocopied or reproduced without the prior written consent of
Hewlett-Packard Company.
This manual provides information for you to install and verify correct operation of the HP
27128A Asynchronous Serial Interface (ASI) card. You will also need the appropriate computer
system installation manual. These two manuals should provide all the required information. If
your installation is such that you need additional information concerning the ASI card, order the
HP 27132A Technical Reference Package from the nearest Hewlett-Packard Sales and Service
Office.
Installation and Checkout
To install and check the operation of the ASI card, follow the steps below in the order given:
1. Deterrnine if your computer system can supply the power needed for the ASI card. Refer
to table 1 for power requirements.
2. Set the switches on the card for proper operation in your system. Refer to tables 2 and 3
for switch information.
3. Install the card in the appropriate slot in the computer. Refer to the computer system
installation manual to determine the correct slot.
4. Connect the cable, supplied with the card, from J2 on the card to the peripheral device. If
you have the diagnostic test hood, which exercises slightly more of the card's circuitry,
and can be ordered (Hewlett Packard part number 1258-0207), connect it to J2 instead
of connecting the cable.
5. Turn on computer system power.
6. A self-test is contained on the card. The host computer system dE?termines if the self-test
is run automatically at power-on or must be invoked by the user. Refer to the appropriate
manual for your system for a description of self-test initiation.
a. If the diagnostic test hood is not installed when the self-test executes, the LED
located on the card should light briefly and go out. This indicates that the card passed
self-test. If the LED does not light at all, the card is defective. If the LED stays on, the
card did not pass self-test. In either of the latter two cases, return the card to Hewlett-
Packard (refer to the "RESHIPMENT" paragraph for details).
b. If the diagnostic test hood is installed when the self-test executes, the LED located on
the test hood should light briefly and go out if the card passed self-test. If the test
hood LED stays on or does not light, the causes are the same as in step 6. a.
7. Refer to your system documentation for information on determining if the system can talk
to the ASI card.
Reshipment
If the ASI is to be shipped to Hewlett-Packard for any reason, attach a tag identifying the owner
and indicating the reason for shipment. Include the part number of the ASI.
Pack the card in the original factory packing material, if available. If the original material is not
available, good commercial packing material should be used. Reliable commercial packing and
shipping companies have the facilities and materials to repack the item. BE SURE TO
OBSERVE ANTI-STATIC PRECAUTIONS.
2
Table 1. Power Requirements
Voltage Current Power Dissipation
+ 5V 1.29A 6.45W
+12V 0.054A 0.65W
-12V 0.073A 0.87W
Table 2. Configuration Switch Definitions
Switch Number
SWI SW2 SW3 SW4 SW5 SW6 SW7 SW8
Function
Single Hard- No 8 Data Baud Baud Baud Baud
Text Wired Parity Bits Rate Rate Rate Rate
Term Bit 3 Bit 2 Bit 1 Bit 0
{when {when {when (open,
open) open) open) 8 bits; (open = logic 1,
closed, closed l'OgiC
0)
7 bits)
I I
Table 3. Baud Rate Switch Settings
Switches Baud Rate
SW5 SW6 SW7 SW8
0 0 0 0 50
0 0 0 1 75
0 0 1 0 110
0 0 1 1 134.5
0 1 0 0 150
0 1 0 1 300
0 1 1 0 600
0 1 1 1 900
1 0 0 0 1200
1 0 0 1 1800
1 0 1 0 2400
1 0 1 1 3600
1 1 0 0 4800
1 1 0 1 7200
1 1 1 0 9600
1 1 1 1 19200
3
Table 4. RS-232-C Male Cable (Part Number 8120-4008) Pinouts
Cable ASI Card
Connector Connector J2
Pin No. Pin No. Function
1 Shield
2 A22 Transmitted Data
3 A9 Received Data
4 B15 Request to Send
5 A8 Clear to Send
6 A12 Data Set Ready
7 B7,B8,B9,BI0 Signal Ground
Bll,BI2,BI3,BI4,
8 A14 Receiver Ready
9 - Not Used
10 - Not Used
11 - Not Used
12 B16 Secondary Receiver Ready
13 A16 Secondary Clear to Send
14 B17 Secondary Tranmitted Data
15 - Not Used
16 B18 Secondary Received Data
17 - Not Used
18 - Not Used
19 A17 Secondary Request to Send
20 A15 Data Terminal Ready
21 - Not Used
22 B19 Incoming Call
23 B21 Data Signal Rate Selector
24 - Not Used
25 - Not Used
4
Table 5. RS-232-C Female Cable (Part Number 8120-4012) Pinouts
Cable ASI Card
Connector Connector J2
Pin No. Pin No. Function
1 Shield
2 A9 Transmitted Data
3 A22 Received Data
4 A8 Request to Send
5 815 Clear to Send
6 A15 Data Set Ready
7 87,88,89,810, Signal Ground
811,812,813,814
8 - Not Used
9 - Not Used
10 - Not Used
11 - Not Used
12 - Not Used
13 A17 Secondary Clear to Send
14 - Not Used
15 - Not Used
16 - Not Used
17 - Not Used
18 - Not Used
19 A16 Secondary Request to Send
20 A12 Data Terminal Ready
21 - Not Used
22 - Not Used
23 - Not Used
24 - Not Used
25 - Not Used
5
Flin- HEWLETT
~~ PACKARD
Manual Part No. 27128-90001 Hewlett-Packard Company
Printed in U.S.A Roseville Division
September, 1982 8000 Foothills Boulevard
Roseville, California 95678
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