QEI UG-1032 User manual

UG-1032
6LAP5 LAN Adapter Panel
Dual Modem
December 2018

UG-1032 6LAP5 LAN Adapter Panel Dual Modem
Copyright © 2016 QEI
UG-1032 6LAP5 LAN Adapter Panel Dual Modem
ALL RIGHTS RESERVED
NOTICE
The information in this document has been carefully checked and is believed to be
accurate. However, no responsibility is assumed or implied for inaccuracies. Further
more, QEI, reserves the right to make changes to any products herein described to
improve reliability, function or design. QEI does not assume liability arising to the
application or use of any product or circuit described herein; neither does it convey
any license under its patent rights nor the rights of others.
This manual and all data contained constitutes proprietary information of QEI and
shall not be reproduced, copied or disclosed to others, or used as the basis for
manufacture without written consent of QEI.
45 Fadem Road
Springfield, NJ 07081
Phone: [phone]
Fax: [phone]
Web Site: www.qeiinc.com

UG-1032 6LAP5 LAN Adapter Panel Dual Modem
Copyright © 2016 QEI Revisions  i
Revisions
Revision
Description
Date
A
Release to Production
August 1998
B
Revised per Marked Print
February 1999
C
Revised to change test tone
from constant carrier to alternate
marking & spacing
May 1999
D
Revised to Reflect Designations
in Schematic
June 1999
E
Formatting Update
March 2000
F
Formatting Update
August 2001
G
Functional Description
March 2008
H
Formatting Update
September 2012
I
J
Formatting Update
Updated QEI Address
February 2016
December 2018

UG-1032 6LAP5 LAN Adapter Panel Dual Modem
Copyright © 2016 QEI Contents  i
Contents
1General Description .................................................................1
2Modem Hardware Specification ..............................................2
2.1 Micro-controller....................................................................2
2.2 Modem ................................................................................2
2.3 Communications..................................................................2
2.4 Data Rate............................................................................2
2.5 Modulation...........................................................................2
2.6 Carrier Frequencies.............................................................2
2.7 Receive Sensitivity...............................................................2
2.8 Pre-emphasizing..................................................................2
2.9 Transmit Gain......................................................................2
2.10 Test tone .............................................................................2
2.11 Line Configuration................................................................2
2.12 Line Impedance...................................................................3
2.13 Push-To-Talk.......................................................................3
3General Specifications.............................................................3
3.1 Physical...............................................................................3
3.2 Power..................................................................................3
3.3 Environment ........................................................................3
3.4 Weight.................................................................................3
4Strapping Description..............................................................4
5Connection to the Line Transformers.....................................5
6LED Indicators..........................................................................5
7Functional Description.............................................................5
7.1 Bell 202 Compatible Modem................................................5
7.2 Central Processor Panel Connections .................................6
7.3 Test Tone............................................................................7
8Interconnection Cables............................................................7
9Ordering Information................................................................7
10 Other Related Equipment and/or Programs...........................7
11 Other Related Documentation.................................................8

UG-1032 6LAP5 LAN Adapter Panel Dual Modem
Copyright © 2016 QEI General Description  1
1 General Description
The 6LAP5 is a PCB assembly designed for use with the 6CPP6 Central Processor
Panel only. The 6LAP5 plugs into the Central Processor Panel through two 32-pin
DIN connectors, and provides two independent communications ports. The ports are
identified as PORT #1 and PORT #2. Both ports are Bell 202 compatible dedicated
telephone line modem capable of asynchronous operation. The two modems can be
configured to provide both bit-oriented protocols, both byte-oriented protocols or one
bit-oriented and one byte-oriented protocol. The protocol used in the 6LAP5 is
determined and configured by the 6CPP6 Central Processor Panel.
Each Bell 202 modem consists of a Silicon Systems SSI73K302 single-chip modem
IC controlled by a Microchip PIC16C62 micro-controller. It includes registers, which
are configured by the 6CPP6 Central Processor Panel to control modem
communication settings, such as RTS/CTS delay, local squelch duration, etc.
Pluggable jumpers are provided for adjusting transmitter gain, receiver sensitivity,
and 2-wire or 4-wire operation. An on-board LED provides visual indication that the
modem micro-controller is functional. This modem does not contain transmit and
receive transformers for signal coupling to/from the telephone lines. Connections
between the modem and external line transformers are made via a six-pin MOLEX
mini-fit type connector.
Also in order to compensate the high frequency loss on the communication lines
each modem is equipped with a high frequency emphasizing circuit, which provides
6dB slop gain compensation from 300 to 3000 Hz. An alternate mark/space
frequency tone is jumper selectable and can be used for line alignment.
The data and control signals are in logic levels, which are required by the UARTs on
the 6CPP6 Central Processor Panel. Connections are provided for handshaking, as
well as PTT (push-to-talk). Unused inputs are pulled to -12V (inactive state for the
UARTs on the 6CPP6 Central Processor Panel) using internal 10K ohm pull-down
resistors.
The 6LAP5 receives its power from the Central Processor Panel through its two 32-
pin DIN connectors, JP4 and JP5. No external power supplies are required.
Many of the 6LAP5 modem configuration settings are under software (program)
control. The configuration resides in the 6CPP6 Central Processor Panel that the
6LAP5 is connected to. Before the 6LAP5 can be placed in operation, it requires that
the proper configuration be placed into the 6CPP6 Central Processor Panel using
Configuration Table software. Refer to the 6CPP6 ConfigWiz Manual for information and
instructions.
WARNING
The 6LAP5 is designed to connect to the 6CPP6 panel at JP4 and JP5 only. Do
not connect the 6LAP5 to JP6/JP7 or any other connectors on the 6CPP6!!!!

6LAP5 LAN Adapter Panel Dual Modem UG-1032
2  Modem Hardware Specification Copyright © 2016 QEI
2 Modem Hardware Specification
2.1 Micro-controller
Microchip PIC16C62A, 20 MHZ, 8-bit micro-controller.
2.2 Modem
Silicon Systems SSI73K302L Bell 202 single chip modem.
2.3 Communications
Asynchronous
2.4 Data Rate
1200 baud
2.5 Modulation
Frequency Shift Keyed (FSK)
2.6 Carrier Frequencies
Mark: 1200 Hz
Space: 2200 Hz
Soft Carrier: 900 Hz
2.7 Receive Sensitivity
-30 dBm or -45 dBm, jumper selectable (it requires 600 ohm external line matching
transformers)
2.8 Pre-emphasizing
Each modem is equipped with a high frequency emphasizing circuit, which provides
a 6dB-slop gain from 300Hz to 3000 Hz.
2.9 Transmit Gain
-12 dBm to 0 dBm, in 3 dBm steps, jumper selectable (requires 600 ohm external
line matching transformers)
2.10 Test tone
An alternate Mark/Space frequency tones can be sent from either one of the
modems to the communication line for line alignment test.
2.11 Line Configuration
2-Wire or 4-Wire, jumper selectable

UG-1032 6LAP5 LAN Adapter Panel Dual Modem
Copyright © 2016 QEI General Specifications  3
2.12 Line Impedance
600 ohms with external line matching transformers.
2.13 Push-To-Talk
Open collector capable of sinking up to 120 mA @12Vdc.
3 General Specifications
3.1 Physical
4.75 in. L x 4.00 in. W. x 1.00 in. H
3.2 Power
+12Vdc, -12Vdc, and +5Vdc from 6CPP6 through DIN connectors JP4 and JP5.
3.3 Environment
Temperature: 0 to +70 C
Humidity: 5 to 95% @ +70 C, non-condensing.
3.4 Weight
4 ounces

6LAP5 LAN Adapter Panel Dual Modem UG-1032
4  Strapping Description Copyright © 2016 QEI
4 Strapping Description
Some hardware options for the modem are selected by individual pluggable jumpers.
The modems are also identified in the schematics as port 1 and port 2. These
jumpers are designated as follows:
Jumpers
Functions
Port 2
Port 1
JP8
JP3
Modem Receiver Sensitivity
IN = -30 dBm
OUT = -45 dBm
JP7
JP2
Transmitter gain. This jumper group has five individual positions,
from –12 dBm to 0 dBm, (3 dB per step) as marked on the 6LAP5
board.
1 –2: 0dBm
3 –4: –3dBm
5 –6: –6dBm
7 –8: -9dBm
9 –10: -12dBm
JP6
JP1
2-Wire/4-Wire operation. This jumper group has three individual
positions, as marked on the 6LAP5 board:
4-WIRE OPERATION: Two jumpers, (one in each end position).
2-WIRE OPERATION: One jumper (in the middle position).
JP12
JP10
With pre-emphasizing
JP11
JP9
Without pre-emphasizing
JP14
JP13
Insert jumper for BYTE oriented protocol, remove the jumper for Bit
oriented protocol.
JP16
JP15
Insert jumper for test tone carrier.
NOTE
This jumper must be inserted for normal operation!

UG-1032 6LAP5 LAN Adapter Panel Dual Modem
Copyright © 2016 QEI Connection to the Line Transformers  5
5 Connection to the Line Transformers
The modem connections to external line transformers are made via a 6-pin MOLEX
type connectors. The connector pinout is as follows:
Connector
Functions
J2-Part 2 J1-Port 1
Pin 1
4-Wire Transmit HI.
Pin 2
4-Wire Transmit RETURN.
Pin 3
Common
Pin 4
4-Wire Receive or 2-Wire Transmit/Receive HI.
Pin 5
4-Wire Receive or 2-Wire Transmit/Receive RETURN.
Pin 6
PTT (Push-to-Talk, open collector). The push-to-talk
output is capable of sinking 120 mA of current (@12Vdc)
to the circuit common when active.
6 LED Indicators
LED D5 and D10 separately indicate the functional status of the modem 1 and
modem 2 of the 6LAP5 modem micro-controllers. The LED flashes at a 2 Hz rate
during normal operation. When the modem cannot communicate with the 6CPP6
Central Processor Panel, there will be a momentary interruption (or brief blink) to the
flashing pattern, occurring every five seconds. Additional port activity (TX, RX, and
RTS) LEDs are located on the 6CPP6 Central Processor Panel.
7 Functional Description
Each 6LAP5 modem consists of two functional sections: both of these sections are
Bell 202 compatible modem interfaces. The following paragraphs give a brief
description of the operation of these sections.
7.1 Bell 202 Compatible Modem
Each modem section consists of a single-chip modem IC, and a micro-controller. The
modem IC is capable of transmitting and receiving according to the Bell 202 format
which is a standard that is used over leased or dedicated phone lines. It uses a FSK
(frequency shift keying) modulation and de-modulation technique where logic “0”
(SPACE) is transmitted at 1200 Hz, and logic “1” (MARK) is transmitted at 2200 Hz.
An amplification stage boosts the modem transmitter output to the required line
levels. External transmit and receive coupling transformers are needed. These
transformers are generally installed in the 6PCP6 power supply.
The gain of the amplifier is jumper selectable for -12, -9, -6, -3, and 0 dBm measured
across the external transformer with 600ohm termination. The output of the amplifier
is fed to a FET switch which gates the transmission out onto the communication line
when the transmitter is active. The switch is controlled by the micro-controller.
Another amplifier is connected to the modem receiver input. Its gain is jumper
selectable for -30 or -45 dBm input sensitivity, also measured across the external
transformer of 600 ohm line. The micro-controller initializes the modem IC and

6LAP5 LAN Adapter Panel Dual Modem UG-1032
6  Functional Description Copyright © 2016 QEI
configures its various operating parameters. The modem parameters configured by
the micro-controller are as follows:
RTS/CTS Delay. Delay between when the communications port issues
an RTS (request to send) command, to when the modem returns with a
CTS (clear to send).
Local Squelch Duration. Allows the modem to inhibit the receiver for a
period of time after the local transmitter has turned off. This prevents the
local receiver from interpreting echoes caused by the local transmission
that has just completed (used in 2-wire mode).
Carrier Detect (CD) to Receiver Enable Delay. Prevents noise on the
line from being passed as data to the UART before the actual data
arrives.
Soft Carrier Duration. Sets the soft carrier turn-off time. The soft carrier
turn-off is a 900 Hz tone sent prior to the transmitter shutdown after the
end of each transmission. This prevents "ringing" on the communication
line from being interpreted by the receiving modem as extra characters.
Anti-Streaming. Prevents continuous keying of the transmitter due to a
malfunction of the 6CPP6 Central Processor Panel. After the anti-
streaming counter times out, the modem will disconnect itself from the
line by shutting down its carrier and resetting its CTS (clear-to-send) line.
It will not recognize the RTS (request-to-send) line from the UART on the
6CPP6 Central Processor Panel until it has been reset at least once.
NOTE
Some of the above listed parameters are controlled by the program running
on the 6CPP6 central processor panel, and others are determined by the
user through table configuration software. Reference should be made to the
specific system documentation for further information.
7.2 Central Processor Panel Connections
The 6LAP5 plugs into the 6CPP6 Central Processor Panel through its two 32-pin Din
connectors labeled JP4 and JP5. The connectors provide power (+12Vdc, -12Vdc,
and +5Vdc) as well as all interface signals between the 6LAP5 and the Central
Processor Panel.
WARNING
The 6LAP5 is designed to connect to the 6CPP6 panel at JP4 and JP5 only.
Do not connect the 6LAP5 to JP6/JP7 or any other connectors on the
6CPP6!!!!

UG-1032 6LAP5 LAN Adapter Panel Dual Modem
Copyright © 2016 QEI Interconnection Cables  7
7.3 Test Tone
The 6LAP5 provides an alternate Mark/Space at 1200-baud test tone from each of
the modems. This tone can be generated by removing a jumper (JP16 for modem 2
and JP15 for modem 1) from the circuit and will assist the installer to align and test
the communication channel without the use of a separate tone generator. When the
jumper is removed, the modem is switched into diagnostic mode, which will produce
the test tone.
CAUTION
Install the jumper after test. Otherwise the modem will stay in diagnostic
mode; no data will be sent or received.
8 Interconnection Cables
Some typical interconnecting cable part numbers for "standard" applications are
listed below, all cables must be ordered separately. This is only a partial list. For non-
standard or special applications, refer to the documentation supplied with specific
systems.
CABLE PART NO.: 30-057925-XXX (where XXX indicates cable length option)
FUNCTION: Communications
FROM 6LAP5: J1, J2
TO: 600ohm external line
9 Ordering Information
Full ordering information includes a panel assembly Part Number and a panel
assembly Model Designation.
The panel assembly part number is 40-057590-001. The model designation is
6LAP5-1/MODXX where MODXX = modification sheet number if required.
The 6LAP5 works with specific 6CPP6 firmware. Refer to the documentation
supplied with specific systems.
10 Other Related Equipment and/or Programs
Model No.
DESCRIPTION
QEI Part Number
6CPP6
CENTRAL PROCESSOR PANEL
40-057552-XXXX
6CPP6
RTU ConfigWiz Software
80-000053-001

6LAP5 LAN Adapter Panel Dual Modem UG-1032
8  Other Related Documentation Copyright © 2016 QEI
11 Other Related Documentation
Doc. No.
Document Name
UG-1024
6CPP6 CENTRAL PROCESSOR PANEL User's Guide
UM-2012
ConfigWiz User’s Manual
TP-803
6CPP6 TEST PANEL SOFTWARE INSTRUCTION MANUAL