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

1
of 116
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

2
of 116
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.

3
of 116
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

4
of 116
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.

5
of 116
Quick Start Programming Menu Tree

6
of 116
System Menu
Channel Menu
Security Menu
Touch Enter Key
Touch Enter Key
Touch Enter Key
Version 1.# (1)
ON/OFF/IHB: ON
Security Options
Move through options with
UP/Down Key
Move through options with
UP/Down Key
Move through options with
UP/Down Key
Adjust Contrast
(6)
Sensor
:4-
20mA (1
)
Change Password
Inhibit
: None/All
Full Scale:
###
Lock System
Set Local Relays
(2)
Units
: %/PPM / PPB /None
Relay: Common Fail
Tag:
Six character name
Failsafe: Yes (3)
Damping (S):
0
-
10
F1
F2
F3
F4 (4)
Zero DB (%FS
):
0
–
5
Relay: Common Warn
Inhibit(mA):
2.0
–
20.0
Failsafe: Yes/No
Fault(mA):
0.1
–
20.0
W1
W2 W3 W4 (4)
Setup Warning
(2)
Relay: Common Alarm
Warn Set: ###
Failsafe: Yes/No
Warn Reset: ###
A1
A2 A3
A4 (4)
Warn Delay: 0
–
10 sec.
Relay: Common Horn
Warn Hold: 0
–
7200 sec.
Failsafe: No (3)
Warn Latch: Yes/No
W1
A1
... W4
A4 (4)
Setup Alarm
(2)
Press Escape Key then UP key to
advance to next me
nu
Same values available under
Warning
Set Remote Relays
(5)
Cal Loop Input
Remote Relay 1
–
8
Cal Loop Output
Move through all 8 relays with UP
key. Press ENTER to adjust.
Failsafe: Yes/No
W1 (4)
Press Enter k
ey to step back to
relay 1
-
8
Time:
##:##
Date:
## / ## / ####
Notes:
1.
These values are factory set and cannot be adjusted.
2.
To access the submenu associated with these parameters, press the ENTER key. To bypass the
parameters, press the UP/DOWN
key. Once a submenu value has been programmed, press the ESCAPE
key to go back to the main menu.
3.
The common fail relay can only be programmed as failsafe. The common horn relay can only be
programmed as non
-
failsafe (otherwise the horn enunciator woul
d always be on). Press the ENTER key to
continue with the programming.

7
of 116
4.
The relays can be configured for any configuration desired. W = warn, A = alarm, F = fail and the numbers 1
–
4 designate channel number. & = And logic,
= Or logic and ( ) are use
d to group channels. Refer to the
“
Remote Relay Operation” for additional information. Press the ENTER key when the programming is
complete and the UP/DOWN key to go to a different menu.
5.
The SET REMOTE RELAYS menu is only available if this option is phys
ically connected to the 7400
controller. Otherwise the menu is not displayed.
6.
The CONTRAST menu is selected by pressing the ENTER key and then adjusting the contrast with the
UP/DOWN key.

8
of 116
Receiver/Controller
General
The QuadScan II Receiver/Controller i
s a 4 channel gas receiver designed to operate with any 2, 3, or 4 wire gas
transmitter. The unit has 3 major components:
NEMA
-
4X wall mounted enclosure
Display/function assembly
CPU/power supply boards
All setup functions are completely programmable usi
ng the switches located on the display/function assembly. An
internal alarm horn is mounted within the enclosure providing 85 db at 1 ft.
Four 5A SPDT relays are included which are common to all 4 channels. Relays provide the following:
FAIL
Activates on
a failure of the current loop signal from the field device or an internal failure such as
power loss.
WARN
Activates on a programmed set point corresponding to an increasing or decreasing gas
concentration, flame signal or any other analog signal.
ALARM
Activates on a programmed set point corresponding to an increasing or decreasing gas
concentration, flame signal or any other analog signal.
Note:
Alarm set points are typically programmed for a higher gas concentration than the warn
setpoint when monitor
ing an increasing gas concentration, including toxic and combustible gases. For
a decreasing gas concentration application such as oxygen, the alarm set point is set lower (e.g. 16%
v/v) than the warn set point (e.g. 19.5% v/v). Although, the alarm set po
int can be programmed to
detect rising oxygen concentration and the warn setpoint programmed to detect decreasing oxygen
concentration.
HORN
Programmed to activate on for warn, alarm or both.
An optional remote relay assembly in a NEMA
-
4X wall mount encl
osure can be provided when individual alarm
outputs are required. There are six 5A SPDT and two 5A DPDT relays. These relays can be assigned or zoned to
any input channel.
The Quadscan II receiver controller will not operate with out a source of electri
city. If you require an electricity source
for short term outages either provide another source of electricity such as a battery backup. An optional battery
backup assembly is also available providing 2.5 amp
-
hours of DC power to the unit. Factory suppl
ied battery (Scott
Health & Safety P/N 004
-
0002) is a Sonnenschein Part No. A212/35, 12 volt 2.5 amp hour battery.
Warning: Replace the battery only with the same type and rating.

9
of 116
Failure to do so may be dangerous.
Dispose of batteries per applicable
local, state and federal regulations or contact
Scott Health & Safety or your local Scott authorized distributor.
NEMA-
4X Wall Mounted Enclosure
The enclosure measures 9.32 inches high x 9.19 inches wide x 5.38 inches deep (233 mm x 203 mm x 136 mm). It
provides a watertight, dust tight and corrosion resistant enclosure for outdoor or indoor mounting.
A door covers the digital/function front panel and can open to the left or
right for easy mounting in restricted areas. All displays; gas
concentration,
alarm LEDs, and the function switches, are visible
through the clear opening in the enclosure door. A cover plate is
located at the bottom front area of the enclosure and when it is
removed, access is available for all the terminal strips used for input
an
d output wiring. See
Figure 2A
for correct installation of bottom
cover plate.
Figure 2
-
Model 7400 QuadScan II
Figure 2A
–
Enclosure Side View

10
of 116
Display/Function Assembly
The individual visual display of absolute value of the gas c
oncentrations, alarm status, and channel status for all
active channels provides the status of the gas/flame detection system.
Operator intervention and/or automatic alarm corrections can be made from the information displayed by this unit.
Gas Concentrat
ion is displayed on a LCD in units of PPM, PPB, % and none (flame applications) in any combination
of the four.
Individual Channel Status is displayed by a 2 color LED for each active channel:
Channel OK
Green
Current Loop Fault
Flashing yellow (flashin
g until the reset button is pressed, and then it becomes solid
yellow).
Channel Inhibited
Flashing yellow/green (an inhibited channel cannot be set to steady color)
Individual alarm statuses are displayed for warn and alarm events by a yellow (warn) and re
d (alarm) colored LED for
each active channel. The individual alarm LEDs flash when an alarm condition is detected and remain flashing until
acknowledged by the reset button.
The function section of the unit is used for all programming and setup requirements. Five tactile feel switches are
provided to implement the following functions:
SETUP
To activate programming entry to the system. This also moves the alphanumeric selection one position to
the right on the LCD each time the switch is activated.
UP
To scroll up through the various channels or programming options
.
DOWN
To scroll down through the various channels or programming options.
ENTER
To enter the required programmed option selected from the UP or DOWN switches.
ESCAPE
To return to a prev
ious menu or selection each time the switch is activated. This will
eventually return to the gas concentration display.

11
of 116
NOTE: During the programming mode, if a switch is not activated for 20 minutes, the display automatically returns to
the gas concent
ration display and all previous programming will be lost.
Figure 3
-
Model 7400 Front Panel Push Buttons
CPU/Power Supply Boards
The power supply board is located on the inside back surface of the enclosure. The CPU/display board is located
directl
y behind the display/function panel. They are connected together via a ribbon cable.
The CPU board is used to store the system configuration, operation data and all parameters entered from the function
switches on the display/function assembly.
All inform
ation is stored in non
–
volatile electronically erasable programmable read only memory (EEPROM), which
allows all information to remain stored during a power disconnect.
The power supply board accepts AC and DC power inputs to the system and supplies the va
rious circuit requirements
and the transmitter loops. The system will operate on any AC voltage between 90 to 280 VAC, 50/60 Hz. or DC
voltage between 10 to 30 VDC (nominal 24 VDC). When a battery backup system is connected to the unit and if the
AC power
should fail, the system will automatically switch over to DC power without interruption.
There are 4 common relays located on the power supply board providing SPDT 5A contacts. The warn and alarm
relays can be programmed for normally energized (fail safe) or normally de
-
energized operation as well as
latching/non
-
latching. The fail relay operates in a normally energized (failsafe) mode only. The horn relay operates in
a normally de
-
energized mode only.
When any of the following conditions exist, the relay
contacts change state:
Fail
–
When the 4
-
20 mA loop from the transmitter falls to the programmed fault level.
Warn
–
When a gas concentration exceeds a pre
-
set programmed level (set point), this is normally not a
hazardous condition. When this happen,
the increasing or decreasing gas level concentration needs to be closely
monitored.
Alarm
–
When a gas concentration exceeds a pre
-
set programmed level (set point) which is set higher or lower
for oxygen monitoring than the warn relay. When this happens,
corrective action should take place.
Horn
–
This relay provides a contact for a remote horn and will change state on either/or warn or alarm condition.
The local buzzer will also activate. The horn relay will de
-
energize (turn off) once the silence/rese
t button is
pushed
EVEN WHEN A WARN/ALARM EVENT IS STILL OCCURRING.

12
of 116
Terminal blocks are provided for the following input and output requirements:
TB1
–
2, 3, or 4 wire 4
–
20 mA inputs for Channels 1 and 2
TB2
–
2, 3, or 4 wire 4
–
20 mA inputs for Cha
nnels 3 and 4
TB3
–
AC power input
TB4
–
Battery backup input
TB5
–
2 wire 4
–
20 mA outputs for 4 channels
TB6
–
Remote relay outputs for 8 relays
TB7
–
Contact outputs for fail, warn, alarm, and horn relays provide normally closed (NC), common (C) and
no
rmally open (NO) contacts for customer use.
RISK OF ELECTRICAL
SHOCK- DISCONNECT
OR TURN OFF POWER
BEFORE SERVICING
THIS EQUIPMENT.
WARNING
SHOCK
HAZARD:
Figure 4
-
Terminal Strip Layout

13
of 116
Installation
The installation information is presented in three sections:
Selecting the appropriate physical location
Methods of physical mounting
Directions for wiring
N
ote: Remote relay installation is covered in a separate section.
Selecting the Physical Location
The specific location for the receiver/controller is the responsibility of the user.
Use the following guideline to determine the appropriate location for th
e unit:
Do not exceed the temperature range of
-
13º F to 122º F (
-
25º C to 50º C)
Must be located in non
-
hazardous areas
Should avoid extreme vibration, dampness and temperature variations
Avoid direct sunlight or provide a sun screen
Should have easy vi
sibility and access for the operator
Must allow sufficient clearance for wiring, maintenance, set up and programming
WARNING
: If the equipment is not installed as prescribed by the manufacturer, the accuracy of the
reading may be low resulting in
Met
hods of Physical Mounting
The enclosure dimensions are 9.3 inches high x 9.2 inches wide x 5.4 inches deep and weighs 4 lbs. (237mm H x
233mm W x 137mm D and 1.75 Kg) Refer to
Figure 5
for recommended clearances and mounting hole locations.
Locate the 6
mounting holes at the desired location and drill for the proper bolt size. It may be advisable to perform
the following steps before moving to the job site. The display/function assembly and bottom front cover plate will need
to be removed from the base
enclosure to access the mounting holes. Unless this is an instrument relocation, the
power hasn’t been wired in yet.
Be sure power is removed from the unit before disconnecting the flat ribbon
connector.
1.
The display/function assembly can be removed
by inserting a small blade screwdriver into the 3/8 "long slot
located on the
right side,
closest to the back of the enclosure.
2.
Insert the screwdriver into the slot and lever it outwards, dislodging the hinged section of the base enclosure.

14
of 116
3.
Move t
he hinged section away from the side of the enclosure, disengaging it from the base.
4.
Tilt the assembly away from the base enclosure and unplug the ribbon cable from the display circuit board.
Power must be off before removing ribbon cable.
5.
On the
left side, follow steps 1
–
3. The assembly will then lift clear of the base.
Caution: All circuit board components are now exposed. Extreme care must be taken not to
damage these components.
Using #8 mounting screws or bolts, mount the enclosure to
the wall or other suitable structure via the 6
mounting holes in the enclosure.
Use the following steps to attach the assembly to the base:
1.
Position the display assembly over the base.
2.
On the left side, move the hinge section out from the assembl
y and make sure it has engaged the hinge rod.
3.
Push the top of the hinge section in towards the side of the assembly, locking the left side to the base.
4.
Pull the right side of the assembly away from the base and reconnect the ribbon cable.
5.
On th
e right side, follow steps 2
–
4 to complete closing the assembly to the base.
Note:
The bottom of the enclosure is pre
-
drilled for cable entry. Clearance should be allowed for the cables
or conduits when mounting the enclosure. Use all NEMA
-
4X rated comp
onents for cable entry to maintain the
rating of the enclosure.

15
of 116
Figure 5
-
Mounting Dimensions of Model 7400
Table of contents