Oldham MX 32 User manual

Installation and
Operating Manual
MX 32
2 CHANNEL
CONTROLLER
SINGLE CHANNEL
Reference: NPM32GB
Revision: B.1
The Fixed Gas Detection Experts

ii
MX 32
Instruction Manual
Copyright 2013 by Oldham
All rights reserved. Reproduction in any form, in whole or in part, without the
express written consent of Oldham is strictly prohibited.
The information contained within this manual is true and correct to the best of
our knowledge.
Due to ongoing research and development, the specifications of this product
may be changed at any time without notice.
Oldham
Rue Orfila
Z.I. Est –CS 20417
F –62027 ARRAS Cedex
Phone: [phone]
Fax: [phone]

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MX 32
Instruction Manual
TableofContents
Chapter 1 │General Information ...................................................1
The User’s Guide......................................................................................... 1
Symbols used.............................................................................................. 1
Safety Warnings .......................................................................................... 2
Important Information .................................................................................. 2
Limitation of liability ..................................................................................... 2
Chapter 2 │General Introduction..................................................3
Subject ........................................................................................................ 3
View: Front internal...................................................................................... 3
View: Front .................................................................................................. 4
LCD Information .......................................................................................... 5
View: Internal............................................................................................... 5
Chapter 3 │ Installation and wiring ..............................................7
Mounting the controller ................................................................................ 7
Wiring.......................................................................................................... 8
Chapter 4 │Operating instructions .............................................13
Displays..................................................................................................... 13
Navigating the menus................................................................................ 16
PRG Menu (Programming) ........................................................................ 18
INI Menu (Initialization).............................................................................. 23
Cal Menu (Calibration)............................................................................... 25
Cod Menu (Access code) .......................................................................... 30
Buz Menu (Buzzer).................................................................................... 31
Chapter 5 │Cleaning, servicing and maintenance .....................33
Cleaning .................................................................................................... 33
Maintenance and servicing........................................................................ 33
Fuse replacement...................................................................................... 34

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MX 32
Instruction Manual
Parts.......................................................................................................... 34
Chapter 6 │Technical specifications..........................................35
Chapter 7 │Technical specifications..........................................37
Chapter 8 │ Particular Specifications.........................................39
Specifications for mechanical
and electrical installations in Explosive Zones........................................... 39
Metrological specifications......................................................................... 39
Connecting detectors other than
Oldham detectors to the MX 32 controller ................................................. 40
Markings:................................................................................................... 41

1 –General Information
1
Chapter 1 │General Information
The User’s Guide
Please read the following notice carefully before installation and start-up,
paying particular attention to the end-user safety instructions. This user’s
guide should be distributed to every individual involved in the start-up, use,
maintenance or repair of the system. The information contained in this
manual, the data and technical drawings are correct as of the date of
publication. Should questions arise, please contact Oldham for additional
information.
This manual is designed to provide users with simple and precise information.
Oldham shall not be held responsible or liable for any misinterpretation that
may result from the reading of this manual. Although every effort is made to
ensure accuracy, this manual may contain unintentional technical
inaccuracies.
On behalf of its clients, Oldham reserves the right to modify the technical
characteristics of its equipment, without notice, to improve product
performance. This user manual and its contents are the inalienable property of
Oldham.
Symbols used
Icon
Meaning
This symbol indicates useful additional information.
This symbol indicates:
This equipment must be grounded.
This symbol indicates:
Safety grounding terminal. A cable of adequate diameter must
ground any terminal with this signal.
This symbol indicates:
Caution: In the current operating mode, failure to adhere to
the instructions preceding this symbol can result in a risk of
electric shock or death.
This symbol indicates:
Please refer to the instructions.
Double isolation.

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MX 32
Instruction Manual
European Union (and EEA) only. This icon indicates that in
accordance with Directive DEEE (2002/96/EC) and with the
regulations of your country, this product may not be disposed with
household waste.
Dispose of this product at a collection site intended for electrical
waste, for example an official EEE (Electrical and Electronic
Equipment) collection site with a recycling or take-back program
for authorized products available to consumers whose purchases
replace old EEE products with new equivalents.
Failure to comply with regulations for the disposal of this type of
waste can be harmful to the environment and to public health, as
EEE products typically contain potentially hazardous substances.
Your complete cooperation in the disposal of this product will help
to ensure a more efficient use of natural resources.
Safety Warnings
Icons have been placed on the central controller to call attention to general
use safety precautions. These labels are an integral component of the central
controller. Replace any label that has peeled off or become illegible. The
meanings of these labels are explained below.
Installation and electrical connections must be performed by a
qualified professional, according to the manufacturer’s specifications
and to the standards of authorities in the field.
Failure to observe these rules may result in serious injury.
Exactness, particularly regarding electricity and assembly
(couplings, network connections) is imperative.
Important Information
The modification of any component or the use of any third party components
will automatically void any and all guarantees.
The central controller is intended to be used for precise applications of a
technical nature. Exceeding the indicated values is strictly prohibited.
Limitation of liability
Neither Oldham nor any other affiliated organization shall be held liable under
any circumstances for any damage whatsoever including, without limitations,
damages for loss of production, interruption of production, loss of information,
controller failure, personal injury, loss of time, money, or materials, or for any
indirect or consecutive consequence of loss occurring during the use of the
product or the inability to use the product, even in the event that Oldham had
been informed of such damages.

2 –General Introduction
3
Chapter 2 │General Introduction
Subject
The MX 32 controller is intended for light units that do not require an electrical
cabinet.
The MX 32 measurement and alarm controller can measure 1 or 2 channels
independently. Each channel is linked to one or more sensors installed in the
locations being monitored. The measurement from the sensor is displayed on
the MX 32 controller and compared to the alarm thresholds. In the event that
the measurement exceeds the threshold, the controller activates the relays
which can be used to control external components.
View: Front internal
The MX 32 controller is composed of the following components:
■A wall-mounted enclosure (ref. A) equipped with a terminal cover (ref. F), a
faceplate (ref. C) and a transparent hinged cover (ref. D) ;
■a power supply board (analog) (ref. E) ;
■a display card (microprocessor) (ref. B).
Figure 1: Overall view of the MX 32 controller components.

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MX 32
Instruction Manual
View: Front
Figure 2: Full view of the MX 32 controller.
Ref.
Function
A.
Button to increase the value displayed or flip to the next menu/option.
B.
Button to decrease the value displayed or flip to the previous menu/option.
C.
LCD screen displaying measurements, menus and options.
D.
Labels, for the LCD screen, indicating the display for Channel 1 or Channel 2.
E.
Menu access button. See page 16.
Button to confirm the value displayed.
F.
Buzzer activated in the case of fault or alarm if authorization is granted. See page 31.
G.
LEDs for Channel 1.
H.
LEDs for Channel 2.
J.
Removable faceplate; also see ref. R.
K.
LED lights up when the channel is active.
L.
Alarm threshold for level 1. LED lights up when the alarm threshold is exceeded or
when programming the alarm threshold for the channel.
M.
Alarm threshold for level 2. LED lights up when the alarm threshold is exceeded or
when programming the alarm threshold for the channel.
N.
Fault LED
■Lights up when there is a fault in the channel.
■Blinks during programming of the channel.
P.
Access to the zero and sensitivity settings (Figure 4, ref. O to R).
Q.
Connection terminals (sector, 24VDC, sensors, dry alarm contacts); front view with
protective cover removed.
R .
Removable faceplate in maintenance position.

2 –General Introduction
5
LCD Information
Figure 3: LCD Information.
Ref.
Function
See page
A.
Indicator for alarm threshold rising.
13
B.
Indicator that Channel 1 is selected. See Figure 2, ref. D.
14
C.
Digital indicator (measurement value, alarm threshold value, etc.)
13
D.
Indicator that Channel 2 is selected. See Figure 2, ref. D.
14
E.
Percent symbol.
18
F.
Negative sign.
G.
Indicator for alarm threshold falling.
18
H.
Symbol indicating level 1 alarm threshold (AL1) activated.
18
J
Symbol indicating level 2 alarm threshold (AL2) activated.
18
K.
Time delay after calibration (blocking the relays): the yellow LED blinks
and the icon is displayed.
18
L.
A Maintenance key icon is displayed while the programming and
calibration menu is being used.
18
View: Internal
Figure 4: Internal view.

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MX 32
Instruction Manual
Ref.
Function
See page
A.
Configuration jumper (J03) for Fault* relay settings.
■Up position: Fault relay contact closed in alarm mode.
■Down position: Fault relay contact open in alarm mode.
10
B.
F7 Fuse (5x20, 250 V AC - 2 A T) with 24V DC power supply.
8
C.
F9 Fuse:
■5x20, 250 V AC - 160 mA T with 230 VAC power supply.
■5x20, 250 V AC - 315 mA T with 115 VAC power supply.
8
D.
F8 Fuse:
■5x20, 250 V AC - 160 mA T with 230 VAC power supply.
■5x20, 250 V AC - 315 mA T with 115 VAC power supply.
8
E.
Sector power supply terminal (230 V AC or 110 V AC upon request) with
the following identifications: P (phase), N (neutral) and (ground).
8
F.
Power terminal block 24 V DC (0, + 24V).
8
G.
Fault relay terminal block. Contacts RCT, 250 V AC –2 A. Contact
status not in alarm mode as defined by J03 (ref. A).
10
H.
Terminal block connection for channel #1 sensor.
9
I.
Relay terminal block RL 1 - Channel 1. Contacts RCT, 250 V AC –2 A.
Contact status not in alarm mode as defined by J10 (ref. X).
10
J.
Secondary ground connection.
8
K.
Relay terminal block RL 2 - Channel 1. Contacts RCT, 250 V AC –2 A.
Contact status not in alarm mode as defined by J05 (ref. V).
10
L.
Terminal block connection for channel #2 sensor.
9
M.
Relay terminal block RL 1 - Channel 2. Contacts RCT, 250 V AC –2 A.
Contact status not in alarm mode as defined by J08 (ref. W).
10
N.
Relay terminal block RL 2 - Channel 2. Contacts RCT, 250 V AC –2 A.
Contact status not in alarm mode as defined by J07 (ref. U).
10
O.
Zero settings (P4) for channel #2.
26
P.
Sensitivity settings (P6) for channel #2.
27
Q.
Sensitivity settings (P5) for channel #1.
26
R.
Zero settings (P3) for channel #1.
27
S.
Programming circuit (Explo 340 mA or 4-20 mA) for channel #1.
-
T.
Programming circuit (Explo 340 mA or 4-20 mA) for channel #2.
-
U.
Configuration jumper (J07) for Alarm 2*, channel #2 relay.
■Up position: relay contact closed in alarm mode.
■Down position: relay contact open in alarm mode.
-
V.
Configuration jumper (J05) for Alarm 2*, channel #1 relay.
■Up position: relay contact closed in alarm mode.
■Down position: relay contact open in alarm mode.
-
W.
Configuration jumper (J08) for Alarm 1*, channel #2 relay.
■Up position: relay contact closed in alarm mode.
■Down position: relay contact open in alarm mode.
-
X.
Configuration jumper (J10) for Alarm 1*, channel #1 relay.
■Up position: relay contact closed in alarm mode.
■Down position: relay contact open in alarm mode.
Y.
F13 Fuse (5x20, 250 V AC –630 mA T).
-
Z.
F11 Fuse (5x20, 250 V AC –630 mA T).
-
*alarm relays are configured as energized at the factory. This means that they are supplied with
power when not in alarm.

3 –Installation and wiring
7
Chapter 3 │ Installation and wiring
Mounting the controller
The MX 32 controller can be installed in any location except for explosive
atmospheres. Ideally, the controller should be located in an area under
surveillance (security office, control room, equipment room, etc.).
The central controller cover opens at a 90° angle to the left. Make sure to
leave adequate space to completely open the cover once the central controller
is mounted.
Figure 5: Dimensions of the controller
The dimensions for the wall-mounting of the enclosure are indicated on the back.
Figure 6: drilling dimensions for mounting the controller with three M4 screws.

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MX 32
Instruction Manual
Wiring
Before installing the controller, cut off the power supply.
Also refer to the Particular Specifications chapter on page 39.
The controller is intended for use in installation areas that meet Class II
overvoltage requirements and Degree 2 pollution requirements.
The electrical connection must be:
■Performed by a specialist and conform to current regulations in force ;
■Compliant with NF C 15-100.
Verify the current and the grid power supply (the grid power supply must
correspond to the supply indicated on the controller front plate). The operating
voltage is configured at the factory.
The MX 32 does not have an on/off switch.
Certain power supplies can cause serious or fatal injury. All
installation and wiring should be performed before turning on the
power supply.
Incorrect installation can lead to measurement errors or system
failure, all instructions in this manual must be followed carefully to
guarantee proper system operation.
Ground Connection Protection
The controller must be connected to a functional ground connection.
The ground terminal (yellow) (Figure 4, ref. J) is indicated with the following
symbol: .
The cable used must have a minimum diameter of 1.5 mm² and a maximum
diameter of 2.5 mm².
Refer to the wiring examples beginning on page 11.
Power
The MX 32 must be protected upstream by a differential bipolar circuit
breaker. The response curve must be type D.
Power supply
115 V AC
230 V AC
Differential bipolar circuit
breaker caliber
2 x 2 A
2 x 1 A
The cable used must have a minimum diameter of 1.5 mm² and a maximum
diameter of 2.5 mm².
There are two options for transformers suggested for use as a power supply
for the MX 32.
■Bobbin transformer (standard default).
■Toric Transformer (for connecting special sensors such as flame sensors,
etc.).

3 –Installation and wiring
9
Power supply 230 V AC
The sector power supply must be wired to the two terminals marked P
(orange) and N (blue) (Figure 4, ref. E) on the 12 point terminal block for the
power supply card; also see the wiring example on page 11. Protection is
provided by fuses F8 and F9 (160 mA/250 VAC) (Figure 4, ref. C and ref. D).
Power supply 115 V AC
Protection is provided by fuses F9 and F8 (315mA/250 VAC) (Figure 4, ref. C
and ref. D).
Power supply 24 V DC
Must be connected to the terminals marked 0 (grey) and +24V (orange) on the
12 point terminal block for the power supply card (Figure 4, ref. F) as
indicated by the wiring example on page 11. Protection is provided by fuse F7
(2A/250 VAC) (Figure 4, ref. B).
Measurement Channels
The MX 32 controller can be equipped with one or two adjustable and dual
measurement channels (see Figure 7). Three options are suggested at
purchase:
■MX 32 with 2 measurement channels (dual);
■MX 32 with 1 measurement channel (dual);
■1 extension card (to add on to a 1-channel controller).
The MX 32 controller will automatically recognize the number of measurement
channels installed (display).
Figure 7: the 2 measurement channels for the controller.
Sensors
The sensors must be connected to points C1, C2 and C3 on the 12 point
connector for each channel card, as indicated on the wiring example on page
10.
Wheatstone bridge 3 active wire explosive gas detectors
■C1: mid-point (signal).
■C2: detector filament.
■C3: compensator filament.
Channel 1 Channel 2

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MX 32
Instruction Manual
4/20 mA 2 active wire sensors/transmitters
■C1: signal (return to ground).
■C2: not connected
■C3: positive power supply (+24 Volts).
4/20 mA 3 active wire sensors/transmitters
■C1: signal (return to ground).
■C2: power supply (0 Volts).
■C3: positive power supply +24 Volts.
Note
For each family of sensors, on the measurement channel circuits:
■Programming will be carried out by Oldham (programming circuit pads).
■A programming circuit (Explo 340 mA or 4-20 mA) will be inserted on the
mounting by the manufacturer (Figure 4, ref. S and T).
Alarm relays
The MX 32 controller uses two alarm relays per measurement channel which
correspond to two instant pre-programmed alarm thresholds 1 and 2.The
relays are energized (de-energized available on request) and voltage-free.
■The relay corresponding to alarm 1 is connected to the RL1 (green)
terminals on the 12 point connector for each channel card.
■The relay corresponding to alarm 2 is connected to the RL2 (grey)
terminals on the 12 point connector for each channel card.
The relay contacts can be used "normally open" (NO) or "normally closed"
(NC) by flipping the corresponding switch (Figure 4, ref. U or V for AL1 alarms
and references W and X for AL2 alarms).
Refer to the wiring examples beginning on page 11.
Relay fault
The MX 32 controller uses one "Fault" alarm per measurement channel (visual
and auditory) but a single shared "Fault" relay for both channels. The fault
relay is energized and voltage-free. The shared fault relay can be connected
to the points marked DEF (fault) on the 12 point terminal block for the power
supply card.
The relay contact can be used "normally open" (NO) or "normally closed" (NC)
by flipping the corresponding switch (Figure 4, ref. L).
Refer to the wiring examples beginning on page 11.
Wiring examples
The following pages contain two examples of wiring.

3 –Installation and wiring
11
Figure 8: MX 32 controller with 1 explosive sensor on Channel 1 and dual explosive
sensors on Channel 2.
Grounding sector
0V DC
+24 V DC
Telephonic
transmitter
To the
telephone line
Gas valve, closed when
power is cut off*
Shared fault indicator
Fuse or
circuit breaker
Fuse
Contact alarm
Channel 2.
Contact alarm
Channel 1.
The AL1 and AL2 relays can be programmed as
energized or de-energized (factory settings).
The fault relays are energized.
The contact relays are available on the NO or
NC terminals according to the position of the
switch next to each relay.
*Capacity to cut the power to relays 120 VA-
30W resistive; use a relay with external power
source if necessary.

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MX 32
Instruction Manual
Figure 9: MX 32 controller with 1 explosive sensor on Channel 1 and 2 parking CO sensors
on Channel 2 (maximum of 5 loop-connected sensors).
Grounding sector
0V DC
+24 V DC
Telephonic
transmitter
To the
telephone line
Gas valve, closed
when power is cut off*
Shared fault indicator
Fuse or
circuit breaker
Fuse
Contact alarm
Channel 2.
Contact alarm
Channel 1.
The AL1 and AL2 relays can be programmed as
energized or de-energized (factory settings).
The fault relays are energized.
The contact relays are available on the NO or
NC terminals according to the position of the
switch next to each relay.
*Capacity to cut the power to relays 120 VA-
30W resistive; use a relay with external power
source if necessary.

4 –Operating instructions
13
Chapter 4 │Operating instructions
Displays
Indications for start-up
Action or result
Illustration
■Current version of the software and buzzer test.
■Access code for menus currently programmed.
■Display of current AL1 threshold for channel #1.
Simultaneously, the AL1 and Fault-channel 1
indicators light up.
■Display of current AL2 threshold for channel #1.
Simultaneously, the AL2 and Fault-channel 1
indicators light up.
■Display of current AL1 threshold for channel #2.
Simultaneously, the AL1 and Fault-channel 2
indicators light up.
■Display of current AL2 threshold for channel #2.
Simultaneously, the AL2 and Fault-channel 2
indicators light up.
■Time delay (in minutes) for (1) stabilization time
for the measurement channels.
During this time the two yellow DEF (fault)
indicators are lit up.
(1) Time is factory set.

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MX 32
Instruction Manual
■Cyclic display of the measurement channels.
Note: The display alternates between the
measurements of each of the activated channels
(the unit and gas being detected is displayed).
Temporary display of a measurement channel
Action or result
Illustration
■Select the channel to be displayed:
-Press (-) to display Channel 1.
-OR press (+) to display Channel 2.
■Display of the measurement for the channel
selected.
... or.
■One minute later, if the (-) or (+) buttons
are not pressed, the display will return to cyclic
display of the two measurement channels (if in
use).

4 –Operating instructions
15
Cyclic display of the 2 measurement channels
Action or result
Illustration
■Press (-) AND (+) together.
■The alternating display (cyclic) of the 2
measurement channels is now activated.
No display of measurements after manual display
Action or result
Illustration
■Display is presented as shown in the illustration
seen opposite (cyclic display).
■Press (-) AND (+) together.
■The measurements disappear and are replaced
by dashes. The MX 32 controller continues to
monitor the sensor(s) but the display is hidden.
No display of measurements after cyclic display
Action or result
Illustration
■Alternate (cyclic) display of the 2 measurement
channels.
■Press (-) AND (+) together.

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MX 32
Instruction Manual
■The measurements disappear and are replaced
by dashes. The MX 32 controller continues to
monitor the sensor(s) but the display is hidden.
Navigating the menus
Reminder: for security reasons, only trained personnel (with access
codes) are authorized to use the menus listed below.
To quit a menu at any stage, press the (-) and (+) buttons
together.
Viewing the menus
Action or result
Illustration
■Press the button (MENU/ENTER).
■Request for access code.
Note: the first number is blinking.
If there is a response within one minute, the unit
will return to normal mode.
■Enter the first digit of the code.
Press (-): to decrease the number.
Press (+): to increase the number.
Press (ENTER): to confirm the number.
■Proceed to the next stage for each of the other 3
numbers in the code.
■Final display of the access code.
■Confirm the code by pressing (MENU/ENTER).
■The menu flashing PRG (Programming) is
displayed.
See page 18 for instructions on using this menu.
■Press (+) to display the CAL menu
(Calibration).
See page 23 for instructions on using this menu.