Scott QuadScan II 7400 Manual

QuadScan II
MODEL 7400
Four Channel Receiver and Controller
Operation & Maintenance Manual
Rev: 7400 Rev F
Date: 5/02/08
ECN 129028
Part Number: 087 - 0023
Warning: Read & understand
contents of this manual prior to
opera tion. Failure to do so could
result in serious injury or death.

Table of Contents 1
TABLE OF CONTENTS
I NTRODUCTION ............................................................................................................................. 1
Important Safety Issues & Warnings ............................................................................................................... 1
Unpacking ........................................................................................................................................................... 1
G eneral Description ........................................................................................................................................... 2
Figure 1 - Model 7400 QUAD - SCAN II Complete Assembly ........................................................................... 3
QUICK START ................................................................................................................................ 4
Quick Start Programming Menu Tree .............................................................................................................. 5
RECEIVER/CONTROLLER ............................................................................................................. 8
General ................................................................................................................................................................ 8
NEMA - 4X Wall Mounted Enclosure .................................................................................................................. 9
Figure 2 - Model 7400 QuadScanII .................................................................................................................... 9
Figure 2A – Enclosure Side View ..................................................................................................................... 9
Display/Function Assembly ............................................................................................................................ 10
Figure 3 - Model 7400 Front Panel Push Buttons ......................................................................................... 11
CPU/Power Supply Boards ............................................................................................................................. 11
Figure 4 - Terminal Strip Layout ..................................................................................................................... 12
INSTALLATION ............................................................................................................................. 13
Selecting the Physical Location ..................................................................................................................... 13
Methods of Physical Mounting ....................................................................................................................... 13
Figure 5 - Mounting Dimensio ns of Model 7400 ........................................................................................... 15
Directions for Wiring ....................................................................................................................................... 16
Figure 6 - Terminal Block Arrangement on Main I/O – Power Supply Board ........................................... 17
Figure 7 – Transmitter Wiring to Model 7400 ................................................................................................ 17
Figure 8 - Wiring of Normally Open Field Contact into Model 7400 ........................................................... 18

Table of Contents 2
Figure 9 - Battery Backup (P/N 096 - 0719) ...................................................................................................... 19
Outline & Interconnection Wiring ................................................................................................................... 19
SYSTE M OPERATION .................................................................................................................. 20
General .............................................................................................................................................................. 20
Display Readings ............................................................................................................................................. 20
Visual Indications (LEDs) ................................................................................................................................ 20
Current Loops .................................................................................................................................................. 21
Current Loop Outputs ..................................................................................................................................... 22
Alarm and Re lay Operation ............................................................................................................................. 22
Figure 10 - Alarm Set For Increasing or Decreasing Gas Concentrations ............................................... 23
Latching Alarms ............................................................................................................................................... 24
Energized Relays (Fail Safe) ........................................................................................................................... 24
Common Alarm Relays .................................................................................................................................... 24
Fail Relay .......................................................................................................................................................... 25
Horn and Horn Relay ....................................................................................................................................... 26
Inhibiting Alarms .............................................................................................................................................. 26
Sensor Damping Constant .............................................................................................................................. 27
Zero DB ............................................................................................................................................................. 27
SETUP AND PROGRAMMIN G ..................................................................................................... 28
Power Up ........................................................................................................................................................... 28
Programming Setup ......................................................................................................................................... 30
SECURITY MENU ............................................................................................................................................. 31
SYSTEM MENU ................................................................................................................................................. 35
CHANNEL MENU .............................................................................................................................................. 40
OPTIONAL REMOTE RELA YS ..................................................................................................... 52
General .............................................................................................................................................................. 52
Specific ............................................................................................................................................................. 52

Table of Contents 3
NEMA - 4X Enclosure ........................................................................................................................................ 52
Circuit Board .................................................................................................................................................... 52
Cable ................................................................................................................................................................ . 53
Figure 11 - Remote Relay Enclosure – Front View ...................................................................................... 53
Installation ........................................................................................................................................................ 53
Figure 12 - Remote Relay Assembly Outline Dimensional & Installation Drawing (P/N 096 - 2691) ......... 54
Wiring ................................................................................................................................................................ 54
Figu re 13 - Interconnect Wiring Between 7400 & Remote Relay Assembly .............................................. 55
Remote Relay Operation ................................................................................................................................ . 56
Figure 14 - Remote Relay Settings Factory Default ..................................................................................... 56
Remote Relay Setup and ................................................................................................................................ . 58
Programming .................................................................................................................................................... 58
SYST EM MAINTENANCE ............................................................................................................. 63
General .............................................................................................................................................................. 63
Alarm/Relay Check .......................................................................................................................................... 63
TROUBLESHOOTIN G .................................................................................................................. 65
General .............................................................................................................................................................. 65
Channel Test Setup ......................................................................................................................................... 65
Table 2 - Identify and Loc ate Possible Malfunctions During System Failure ............................................ 67
SPARE PARTS ............................................................................................................................. 68
SCOTT HEALTH & SAFET Y WARRANTY ................................................................................... 70
CONTACTING SCOTT HEA LTH & SAFETY ................................................................................ 71
TECHNICAL SPECIFICAT IONS ................................................................................................... 72
FACTORY DEFAULT SETT INGS ................................................................................................ . 73
Table 3 - Factory Default Settings for Receiver/Controller .......................................................................... 73
CUTOMER WORK SHEET ........................................................................................................... 74

Table of Contents 4
LISTING PROGRAMMING SELECTIONS Channel 1 ..................................................................................... 74
LISTING PROGRAMMING SELECTIONS Channel 2 ..................................................................................... 76
LISTING PROGRAMMING SELECTIONS Channel 3 ..................................................................................... 78
LISTING PROGRAMMING SELECTIONS Channel 4 ..................................................................................... 80
LISTING PROGRAMMING SELECTIONS REMOTE RELAYS ....................................................................... 82
APPENDIX A ................................................................................................................................ . 84
Programming Example 1 ................................................................................................................................ . 84
Programming Example 2 ............................................................................................................................... 103
Programming Example 3 ............................................................................................................................... 108

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Introduction
Important Safety Issues & Warnings
The following symbols are used in this manual to alert the user of important instrument ope rating issues:
This symbol is intended to alert the user to the presence of important operating and maintenance
(servicing) instructions.
Shock Hazard – Disconnect or turn off power before servicing this instrument.
Do not open the case when the uni t is powered. Do not open the case in a hazardous environment.
Notify all personnel that the unit is out of service before removing from service
Unpacking
All QuadScan II Receivers/Controllers are individually packaged. If the optional remote relay an d cable is purchased,
it will also be packaged with the receiver/controller. If the optional battery back - up unit is purchased, it will be
packaged separately.
Open each box carefully and remove the items. Identify all items shown in Figure 1 and check yo ur order and packing
list for completeness. Examine each item for external damage. If there is any damage or if any item is missing, notify
the factory at:
Scott Health & Safety Customer Service
4320 Goldmine Rd. Monroe, NC 28110 USA
Phone: (704)291 - 8300 Fax: (704)291 - 8340
For web and email :
www.scotthealthandsafety.com

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General Description
The QuadScan II Receiver/Controller provides the electronic interface with the remotely located gas transmitters
(oxygen, or combustible). It also provides a conti nuous digital display of each monitored gas concentration, various
alarm displays, and alarm functions which can initiate corrective actions when any undesirable gas concentration is
detected
The receiver/controller is offered in a unique configuration, p roviding a complete four channel unit, but will allow 1, 2,
or 3 channels to be purchased within the 4 channel unit. Only the number of channels purchased will be activated for
monitoring in this unit.
If you wish to activate additional channels when less than 4 are purchased, contact the Scott Health & Safety factory
to purchase the activation codes.
A NEMA - 4X wall mounted enclosure contains the microprocessor controlled electronics, displays, and terminal blocks
used for the power input, transmitter 4 -2 0 mA current loop inputs and outputs, relay contact outputs, and remote relay
outputs.

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Figure 1 - Model 7400 QUAD - SCAN II Complete Assembly
Remote Relay Box P/N 096 - 2691
Comes with 10 feet of Cable
(See Fi
gures 10 & 11 for Mounting Details &
Wiring Interconnect)
Battery Backup P/N 096 - 0719
(See Figure 14 for Mounting Details & Wiring
Interconnect)
Model 7400 QUAD - SCAN II

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Quick Start
1. Install per the physical installation information found in this ma nual. Refer to Installation drawings for
mounting requirements.
2. The 7400 can be powered with either 100 - 270VAC or 24VDC. Refer to Electrical drawings for information
about the power input wiring. Wire according to National Electric Code
Do not apply p ower until you have finished wiring the complete system, including
transmitters.
3. Connect your gas transmitter(s) to the 7400. Refer to Figure 7 . ( No relay contacts should be hard wired
into your system at this stage )
4. Touch the Setup key to enter t he programming mode. Use the Up or Down key to program channels 1
through 4. Press the ENTER key once the correct channel is in “Setup” mode. This is seen on the LCD
display next to the channel identification number.
5. Follow the menu trees menus [refer to “ Setup & Programming ” for complete details]. Unless your unit was
pre - configured for your specific application, refer to “ Factory Default Settings ” for factory default values. To
save your programming and finish press the Escape key until SAVE SETTIN GS? is displayed. Press the
ENTER key and this will complete your programming. When programming other channels, each channel
must be completely programmed before you can proceed to another channel.
Model 7400 Function Keys
6. Connect common relays [refer “Terminal Block Arrangement” figure for connections]. Refer to “ Alarm and
Relay Operation ” for further details on relay functionality.
7. If optional remote relays are to be used, connect per the “Optional Remote Relays” section of this manual.
8. For proble ms in startup, refer to the “Troubleshooting” section of this manual. Otherwise contact your local
Scott Health & Safety representative or the Scott Customer Support team.

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Quick Start Programming Menu Tree