d
etcon inc.
Detcon Model 10
Single Channel Digital Control Module
Operator’s Installation & Instruction Manual
September 11, 2007 • Document #2160 • Version 1.4
phone 888-367-4286, 281-367-4100 • fax 281-292-2860 • www.detcon.com • sales@detcon.com
Table of Contents
2.0 Description
2.1 Specifications
2.2 Controller Models
2.3 Alarm Functions and Controller Configuration
2.4 Controller Operation and Menu Selections
2.5 Power Input Options
2.6 Analog 4-20 mA Signal Input/Output
2.7 RS-485 Modbus™ Specifications
2.8 Fault Circuit Functions
2.9 Other Features
2.10 Controller Calibration
2.11 Warranty & Service Policy
Model 10 Single Channel Digital Control Module PG.2
2.0 DESCRIPTION
Two or three digit indicator serves as both a power on indicator
and a direct reading display of the gas concentration. The display
will also flash on and off during any overrange condition.
Alarm set points — alarm 1 and alarm 2 — are menu/software
adjustable in 1 ppm/% increments between 10% & 90% of full
scale range. Programmable switches allow for several user
selectable alarm options.
The fault alarm, depending on the switch programmable
configuration, will activate on loss of power, internal power supply
fault, open circuit in field wiring, open heater/bridge in sensor,
or during an alarm disable condition.
The alarm reset switch resets alarms that have been
programmed latching. It also acts as a menu interface switch to
activate the program menu system and microprocessor
supervised test functions.
Detcon Model 10 single channel digital control modules are designed to supervise and display the status of a single
remote gas sensor assembly. Modules are available for a variety of toxic and combustible gases. Model 10 Series control
modules are designed to operate on an input voltage of 24 VDC and are compatible with a complete line of Detcon
enclosures and mainframe hardware assemblies. The available enclosures include designs for rack or panel mounting in
non-hazardous areas (NEMA 1), for weather proof outdoor location in non-hazardous areas (NEMA 4), and for location
in areas electrically classified hazardous or explosion proof (NEMA 7).
Any combination of Model 10 control modules and Detcon gas sensor assemblies may be installed in a common mainframe
assembly thereby providing monitoring for a variety of gases. Model 10 control modules are compatible with a linear 4-20
mA DC input signal. The module features a direct reading 2 or 3 digit display of the gas concentration, flashing overange,
RS-485 Modbus™ serial output, 4-20 mA analog signal output, and three alarm relays that are status displayed via light emitting diodes located on the front panel. Alarm functions are alarm 1, alarm 2, and fault. All alarms are switch programmable
for latching or non-latching operation with a common front panel reset switch. The reset is part of a common bus when
installed in a mainframe, allowing for the use of an external reset switch common to all modules in the mainframe.
TIONS
2.1 SPECIFIC
Range
Software selectable between 0-5 ppm/% and 0-999 ppm/% in increments of 5 ppm/%
Accuracy/Repeatability
± 2% F.S.
ating T
Oper
–40° F to +175° F
Input Power
24 VDC standard; 12 VDC optional
Power Consumption (per channel)
Normal: 0.8 w
Full Alarm: 1
*Control module only. See sensor product literature for power per sensor.
A
per
em
atts*
.7 watts*
atur
e
Model 10 Single Channel Digital Control Module PG.3
Warranty
One year
Five year fixed fee service policy
Outputs
Analog 4-20 mA DC
Serial RS-485 Modbus™
Relays
Contacts include common, normally open, and normally closed for three alarms
Resistive load: 5A, 250 VAC; 5A, 30 VDC
Inductive load: 2A, 250 VAC; 2A, 30 VDC
Max. operating current: 5A
2.2 CONTROLLER MODELS
The table below provides a list of model numbers of the Series 10 Controller, the target gas and gas formula, and the
standard range for that gas. A particular Series 10 Control Module may be programmed for a different range than standard. For more information on possible ranges see section 2.4.3. To determine the range setting of a particular control
module reference section 2.4.2.
The label on the Model 10 face plate follows a standard color scheme for identifying the gas type: Yellow = Solid State
H2S, Orang
on the face plate also shows the gas formula and range of detection (ppm/ppb/% etc).
e = Combustible Gas, Green = Oxygen, and Blue = Electrochemical Toxic (various). The gas identifyer label
Model # Standard Range Target Gas Formula
0 0-100 % LEL Combustible Gases various
CG–1
HS-10 0-100 PPM Hydrogen Sulfide H2S
O2-10 0-25 % Oxygen O2
C2H30-10 0-100 PPM Acetyldehyde C2H30
C2H2-10 0-100 PPM Acetylene C2H2
C3H3N-1
NH3-10 0-100 PPM Ammonia NH3
AsH3-10 0-1 PPM Arsine AsH3
Br2-10 0-5 PPM Bromine Br2
C4H6-10 0-100 PPM Butadiene C4H6
O2-1
C
CS2-10 0-100 PPM Carbon Disulfide CS2
CS-10 0-100 PPM Carbonyl Sulfide CS
O-1
C
CL2-10 0-10 PPM Chlorine CL2
CLO2-10 0-1 PPM Chlorine Dioxide CLO2
B2H6-10 0-5 PPM Diborane B2H6
C2H6S-10 0-100 PPM Dimethyl Sulfide C2H6S
C3H5OCL
C2H5OH-1
C2H4-10 0-100 PPM Ethylene C2H4
C2H4O-10 0-100 PPM Ethylene Oxide C2H4O
F2-10 0-1 PPM Fluorine F2
CH20-10 0-100 PPM Formaldehyde CH20
GeH4-10
N2H4-10 0-1 PPM Hydrazine N2H4
H2-10 0-100 PPM Hydrogen H2
H2-10 0-100 % LEL Hydrogen H2
0 0-100 PPM Acrylonitrile C3H3N
2 0-1 % Carbon Dioxide CO2
00 PPM Carbon Monoxide CO
-1
0
0-1
0 PPM
0-1
0
00 PPM Ethanol C2H5OH
0-1
0-2 PPM
Epichlorohydrin C3H5OCL
Germane GeH4
0
Model 10 Single Channel Digital Control Module PG.4
HBr-10 0-30 PPM Hydrogen Bromide HBr
Alarm Reset/
Menu Interface Switch
Programming Dip Switches
Calibration Switch
SW2 SW3
HCL-10 0-30 PPM Hydrogen Chloride HCL
HCN-10 0-30 PPM Hydrogen Cyanide HCN
HF-10 0-10 PPM Hydrogen Fluoride HF
CH30H-10 0-100 PPM Methanol CH30H
CH3SH-10 0-100 PPM Methyl Mercaptan CH3SH
NO-10 0-100 PPM Nitric Oxide NO
NO2-10 0-5 PPM Nitrogen Dioxide NO2
O3-10 0-1 PPM Ozone O3
COCL2-10 0-1 PPM Phosgene COCL2
PH3-10 0-5 PPM Phosphine PH3
SiH4-10 0-50 PPM Silane SiH4
SO2-10 0-20 PPM Sulfur Dioxide SO2
C4H8S-10 0-100 PPM Tetrahydrothiophene C4H8S
C4H4S-10 0-100 PPM Thiophane C4H4S
C4H6O2-10 0-100 PPM Vinyl Acetate C4H6O2
C2H3CL
-10 0-100 PPM Vinyl Chloride C2H3CL
2.3 ALARM FUNCTIONS AND CONTROLLER CONFIGURATION
Model 1
options that are accomplished via dip switches. These options include latching of relays, energized/de-energized relays,
and alarm firing direction. Reference Figure #1 for the applicable dip switch locations and settings.
0 control modules incorporate several user selectable alarm programming options and general operating
Figure 1
22..33..11 LLaattcchhiinngg oorr nnoonn--LLaattcchhiinngg RReellaayys
m 2, and f
, alar
All alar
m is pr
alar
ms — alar
m 1
rammed to latch, its corresponding relay and LED indicator, once activated, will stay activated until the
og
s
ault — can be jum
reset button is pressed (assuming, of course, that alarm conditions have cleared).
ram an alarm for latching operation, slide its corresponding switch to the on position. For non-latching opera-
og
o pr
T
tion slide the switch to the off position. The switch locations are as follows: fault – SW2-2, alarm 1 - SW2-8, and alarm
2 – SW2-5.
ogrammed to operate as latching or non-latching. If an
per pr
22..33..22 EEnneerrggiizzeedd oorr DDee--eenneerrggiizzeed
All alarms relays — alarm 1, alarm 2, and fault — can be switch programmed as normally energized or normally de-energized. The standar
d is de-ener
features. A normally energized relay will de-energize when in alarm. A typical application of the energized configuration
d
gized. However, a relay can be programmed as energized to provide application specific
Model 10 Single Channel Digital Control Module PG.5
is to have the fault relay normally energized so that in the event of a power failure to the control module card, the fault
relay will de-energize causing its relay contacts to change state, thereby creating a fault output.
It must be noted that when an alarm relay is jumper programmed as normally energized, the contact outputs, normally
open and normally closed, become reversed. The normally open contact becomes the normally closed and vice versa.
Reconfiguration of the contact output jumpers may be required.
To program an alarm for normally energized operation, slide its corresponding switch to the “on” position. For normally de-energized operation slide the switch to the “off” position. The switch locations are as follows: fault – SW2-1, alarm
1 - SW2-7, and alarm 2 – SW2-4.
22..33..33 AAsscceennddiinngg oorr DDeesscceennddiinngg AAllaarrmms
Alarm 1 and alarm 2 can be switch programmed to operate during ascending or descending gas conditions. This feature
is useful mainly for the monitoring of oxygen deficiency whereas a decrease in oxygen concentration poses a danger to
personnel. However, there may be other applications where the monitoring of a specific gas concentration is desired and
alarms can be programmed to operate when that concentration exceeds or drops below a predetermined range. Typically,
t applications of monitoring for toxic or combustible gases will warrant that the alarm be programmed as ascending.
mos
To program an alarm for ascending gas conditions, slide its corresponding switch to the “on” position. For descending gas
conditions slide t
22..33..44 DDiissppllaayy CCoonnffiigguurraattiioon
The controller uses standard seven-segment displays and comes from the factory pre-configured for a particular range of
detection. The two digit version is standard. A three digit version is also available and is standard for oxygen. A switch is
used to pr
mal places on the displays. These features are preconfigured at the factory and should not require further adjustment.
SW3-1 selects between a 2 digit or 3 digit display. SW3-3 will turn the decimal point either on or off, and SW3-2 sets
the location of the decimal point.
22..33..55 DDeetteeccttoorr PPoowweerr SSeennssee SSwwiittcch
This switch should be lef
22..33..66 AAllaarrmm 22 SSiilleenncce
m 2 can be switch programmed to allow it to be reset in the event of an alarm, even if the alarm condition still
Alar
exists. This feature would be mainly used if there were a strobe light activated by Alarm 1 and a horn Activated by
Alarm 2. In the event of an alarm both the horn and strobe would be engaged but the horn could be silenced and
would remain silenced until the alarm condition went away and a new alarm occurred. To program Alarm 2 for the
silence f
SW3-5.
eatur
he switch to the “off” position. The switch locations are as follows: alarm 1 - SW2-6, and alarm 2 – SW2-3.
n
ram the controller for 2 or 3 digit operation. Additional switches are used to turn on the individual deci-
og
t in the “ON” position at all times.
e
he switch “on”. For normal operation of Alarm 2 turn the switch off. This switch is located at
n t
e tur
s
h
22..33..77 AAllaarrmm RReesseet
An alarm reset switch (SW1), located on the control module face plate is used to reset alarms that have been programmed as latching. Once alarm conditions have cleared, alarms may be reset by simply pushing the momentary
switch and releasing it.
eset outputs are also a feature of the Model 10 control module. This feature is available when used in conjunc-
e r
t
emo
R
tion wit
h Model 1
t
0 com
patible control enclosures and mainframe motherboards.
2.4 CONTROLLER OPERATION AND MENU SELECTIONS
Upon applying power, the display will show dC for approximately 2 seconds. The controller will then enter normal operation mode, displa
22..44..11 SSeelleeccttiinngg aanndd AAddjjuussttiinngg MMeennuu SSeelleeccttiioonns
Besides acting as an alarm reset, the front panel switch is used to access and navigate through the programming menu
system. The Switch functions as both an Enter Key, and as a Selection Key. When it is pressed and held for more than 2
seconds it will act as an Ent
ying the gas concentration. There is a 15 second period after power-up in which alarms are ignored.
s
. When it is moment
y
e
er K
Model 10 Single Channel Digital Control Module PG.6
arily pressed it acts as a Select Key.
To enter the Program Menu press and hold the front panel switch for 10 seconds until the display reads Pr then release.
M
omentarily pressing the switch again after this will scroll through the program options.
The options are as follows:
Pr Program status
rA Range adjust
A1 Alarm 1 adjust
A2 Alarm 2 adjust
Id RS-485 ID adjust
CA Calibration
tE Test mode
To enter into a function momentarily press the switch until the desired option is shown on the display, then press and
hold the switch for 2 seconds until the display ref lects that function’s value. That function’s value can now be adjusted
by momentarily pressing the switch until the desired value is reached. To accept the new value simply hold down the
switch for 2 seconds until the display returns to the Program Menu. The controller will return to normal operation when
there is no key press after 15 seconds.
For example, the following steps would allow adjustment of alarm 1:
1. During normal operation press and hold the switch for 10 seconds until the display reads
2. Momentarily press the switch and the display will read
3. Momentarily press the switch and the display will read
ess and hold the switch for 2 seconds until t
Pr
4.
he display shows the alarm 1 set-point, i.e.
rA.
A1.
Pr.
30.
5. Now momentarily press the switch to change the alarm set-point to the desired value.
6. Press and hold the switch to accept the new value. The display will return to displaying
A1.
The controller will return to normal operation when there is no key press after 15 seconds.
22..44..22 PPrrooggrraamm SSttaattuuss.
.
The Program status function (Pr) scrolls through and displays the controllers current settings. Upon entering this function the display will read somewhat as follows depending on the settings.
rA/99 Range is set to 99
A1/20 Alarm 1 is set at 20
A2/40 Alar
m 2 is set to 40
Id/01 Modbus ID is set to 01
22..44..33 RRaannggee AAddjjuussttmmeennt
e function (
ang
The r
t
rA) allo
s t
w
he adjus
tment of t
he full scale r
eading of t
he controller. Range is adjustable between 5 and
99 on a two digit controller and between 5 and 999 on a three digit controller. Range is adjustable in 5ppm/% increments.
22..44..44 AAllaarrmm 11 aanndd AAllaarrmm 22 AAddjjuussttmmeennt
t
The Alarm adjustment functions (A1 & A2)allow for the adjustment of the alarm trip point levels in 1ppm/% increments. Alar
ms can be adjus
he alar
t
ms ar
e adjus
able be
t
ed between 10 and 90. During adjustment the appropriate LED for that alarm will light.
t
tween 10% and 90% of the Range of the controller. Example: If the range is set to 99,
22..44..55 MMooddbbuuss IIDD AAddjjuussttmmeennt
The Modbus ID adjus
able and displayed in Hexadecimal format between 01 and FF.
ess is adjus
addr
t
22..44..66 CCaalliibbrraattiioonn MMoodde
t
tment function (
e
Id) allo
ws for the setting of the Modbus address for serial communications. The
This function (CA) puts the controller in a mode in which it will behave normally except that it will ignore all alarms and
output a 2mA signal until it is t
aken out of this mode. When in this mode the fault LED will f lash and the fault relay will
actuate. To return to normal mode enter the program menu by holding for 10 seconds and then select the CA function
again and hold for 2 seconds.
Model 10 Single Channel Digital Control Module PG.7
22..44..77 TTeesstt MMoodde
This function (tE) will cause a simulation of applying a full scale gas sample that will take the display through an incremental count up to the top of the range and back down, activating alarms at the programmed set points and allowing
verification of alarm outputs, as well as the overange flashing feature.
e
2.5 POWER INPUT OPTIONS
Standard operating input power of the Model 10 control module is 24 VDC unless 12 VDC is specified at time of order. All of
the circuitry of the Model 10 control module, with the exception of relays, will operate on 12 or 24 VDC.
A 24 VDC control module can be converted to a 12 VDC control module by changing the relays. If this is desired, it is
recommended that the control modules be returned to Detcon to be converted. However, if technical personnel are
used, the 24 VDC relays (OMRON #G6B-2114P-US-DC24) may by replaced by 12 VDC relays (OMRON ##G6B-2114PUS-DC12) at the owner’s discretion. Caution: note that the only identif ication for required input power is the labeling
on the alarm relays.
2.6 ANALOG 4-20 MA SIGNAL INPUT/OUTPUT
The Model 10 receives an analog 4-20 mA signal input and converts it to the specif ied range of detection. The signal is
processed through an analog to digital converter and is calibrated so that a 4 mA input will provide a display readout of
“0” and a 20 mA input will provide a display readout equal to full-scale range. This circuitry is factory set. Should
tment become necessar
adjus
y, refer to the controller calibration section (section 2.10).
2.7 RS-485 MODBUS™ FEATURES AND SPECIFICATIONS
Model 10 contr
gramming menu for multi-point communications. Communication is two wire, half duplex, with the Model 10 control
module set up as a slave device. A master controller up to 4000 feet away can theoretically poll up to 256 different
Model 10 control module cards. This number may not be realistic in harsh environments where noise and/or wiring
conditions would make it impractical to place so many devices on the same pair of wires. If a multi-point system is
being utilized, eac
06, 07, 08, 09, 0A, 0B, 0C, 0D, 0E, 0F, 10, 11, etc.
Model 10 control module ID numbers are set via the programming menu as described in section 2.4.1.
The follo
40000 Range
40001 Reading
40002 Alarm 1 Set Point
40003 Alarm 2 Set Point
40004 Not Used
ol modules feature Modbus™ compatible communications protocol and are addressable via the pro-
ferent address. Typical address settings are: 01, 02, 03, 04, 05,
wing r
h control module should be set for a dif
t describes the parameters available from the Model 10 control module:
ter lis
egis
2.8 FAULT CIRCUIT FUNCTIONS
Model 1
mance. A fault condition will cause the fault LED to illuminate and the fault relay to actuate. The exception to this is if
the fault relay is jumper-programmed as normally energized, a loss of external 24 VDC power or the internal 5 VDC
supply will cause the relay to de-energize but the LED will not illuminate. Below is a list of conditions that will cause a
fault alarm:
0 contr
ol modules f
eature fail safe supervisory circuits designed to assure maximum reliability in system perfor-
. Loss of 24 VDC power to the Model 10 control module (only if relay is programmed as normally energized).
1
2. Open power loop from the control module to the gas sensor. Displayed as “OH”
he contr
3. Open signal loop fr
4. When used with a Detcon TP series solid state H2S sensor — an open heater on the sensor chip. Displayed as “OH”
5. When used with a Detcon FP series combustible sensor — an open catalytic bead or bridge. Displayed as “OH”
6. Loss of the internal 5 VDC supply (only if relay is programmed as normally energized).
7. Signal level drift below 2.4 mA from the gas sensor. Displayed as “SF”
om t
ol module t
Model 10 Single Channel Digital Control Module PG.8
o t
as sensor
he g
. Displayed as “SF”
2.9 OTHER FEATURES
Register 40005 Status Bits
MSB LSB
Fault alarm status
Fault alarm latching/non-latching mode
Alarm 1 alarm status
Alarm 1 latching/non-latching mode
Alarm 1 ascending/descending mode
Alarm 2 alarm status
Alarm 2 latching/non-latching mode
Alarm 2 ascending/descending mode
Not used
Not used
Not used
Not used
Test mode status
Model 10 control modules include other features which are discussed below.
1 Flashing Overange
2.9.
The flashing overange feature will cause the display to flash on and off, at approximately one second intervals once the
top of the range has been exceeded. After the signal drops back into the normal range, the display will cease flashing
and operate normally.
2.9.2 P
olySwitc
h Overcurrent Protection
Model 10 control modules incorporate PolySwitch overcurrent protection components that act as resetable fuses. The
PolySwitch circuit protector is a positive temperature coefficient resistor that undergoes a large, abrupt change in resistance when an overcurrent or high temperature heats it above a specific point. Normally just tens of milliohms, the
esis
r
ance of t
t
he PolySwitch protector increases orders of magnitude when switched. This increase limits current to several milliamps.
When the current or temperature fault that caused the device to switch has been substantially reduced, the PolySwitch
device resets, allowing normal circuit operation to resume. The protector requires no manual resetting or replacement.
Four separate Poly Switches monitor and protect the following circuitry: the 4-20 mA signal input loop, the 4-20 mA
output signal loop, the 24 VDC input power loop, and the 24 VDC output power loop to the sensor.
2.9.3 Initialization Mode
If the calibration switch on the side of the PCB is pressed during insertion of the PCB or during the first 2 seconds
after power up, the unit will enter an initialization mode. The initialization acts as a master reset and should only be
xecuted to restore the controller and its internal memory to factory default values. Initializing the controller will over-
e
write all factory calibration values, alarm set points, 485 ID, and range settings. Initialization is performed at the factory
prior to shipment and is not normally required in the field.
If the initialization is activated, the display will show
ing an Initialization.
1. Default zero (250) and span (4000) values are written to nvram.
2. The controller r
eads t
3. If 3d is selected the default range is set to 999. If 2d is selected the default range is set to 99.
It. The following operations are performed by the controller dur-
he s
atus of t
t
he 3d/2d switc
h.
Model 10 Single Channel Digital Control Module PG.9
4. Alarm 1 is set to 20% of the default range.
5. Alarm 2 is set to 50% of the default range.
6. The RS-485 address is set to 01h.
2.10 CONTROLLER CALIBRATION
The 4-20 mA output of the Model 10 control module is calibrated at the factory and should require no further adjustment. If under some special circumstance calibration is required, use the following instructions. To calibrate the controller
you will need an extender card and have to be able to simulate a 4mA input and a 20mA input.
22..1100..11 CCaalliibbrraattiinngg ZZeerro
Follow the steps below to calibrate the zero (4 mA) signal level input:
1. Input a 4ma signal to the controller.
2. Press and hold the calibration switch SW4 (see figure 1) until the display reads
2E (zero).
read
3. Press and hold SW4 until the display f lashes
should now reflect the input signal. The display will stop flashing and display
eturn to displaying
will r
or by pressing the front panel switch.
22..1100..22 CCaalliibbrraattiinngg SSppaan
Follow the steps below to calibrate the span (20 mA) signal level input.
1. Input a 20 mA signal to the controller.
2. Press and hold the calibration switch SW4 (see figure 1) until the display reads CL. After 3 seconds the display will
2E (zero).
read
3. Momentarily press SW4 until the display reads
4. Press and hold SW4 until the display f lashes
should now r
will return to displaying
or by pressing the front panel switch.
2.11 WARRANT
o
n
lect the in
ef
Y AND
CL. After 3 seconds the display will
2E. The zero reading has been read and saved. The output 4-20 mA
2C (zero complete) for 3 seconds and
2E. The contr
put signal. The display will stop flashing and display
SP. The controller will return to normal operation if there is no key press after 15 seconds
VICE
SER
oller will return to normal operation if there is no key press after 15 seconds
SP.
SP. The span reading has been read and saved. The output 4-20 mA
SC (span comple
te) for 3 seconds and
POLICY
Detcon, Inc., as manufacturer, warrants each new Model 10 series digital electronic control module to be free from
defects in material and workmanship under intended normal use for a period of one year from date of shipment to the
original purchaser. Detcon, Inc., additionally provides for a fixed fee repair/replace service policy which covers Model
ears. The fixed fee service policy shall affect any necessary factory
e y
ies digit
0 ser
1
repair for the period following the one-year warranty period and shall end five years after expiration of the warranty.
ixed policy rate is $75.00 per control module, per transaction, during the period of the policy. The policy is FOB
The f
tcon, Inc., The W
De
al contr
ol modules for a per
oodlands, T
Shipping Address: 3200 A-1 Research Forest Dr., The Woodlands, Texas 7381
phone 888-367-4286, 713-559-9200 • fax 281-292-2860 • www.detcon.com • sales@detcon.com
exas.
Mailing Address: P.O. Box 8067, The Woodlands, Texas 77387-8067
iod of f
Model 10 Single Channel Digital Control Module PG.10
iv
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