Oldham Simtronics OLC(T) 100 Fixed Gas Detector

The OLC/OLCT 100 range of fixed detectors has been designed for detection of combustible gases, toxic gases or oxygen.

Available in explosion-proof or intrinsically safe versions, the OLCT 100 is suitable for detection of all gases in ATEX zones.

The OLCT 100 is available in a stainless steel version, offering increased resistance to corrosive elements (ideal for marine, wastewater treatment plants, food processing activities, etc).

This stainless steel intrinsically safe version is certified for use in zones 0 (gas) and 20 (dust), whereas all other versions of the OLCT 100 are certified for use in zones 1 (gas) and 21 (dust).

Features

• Detection of Combustible, Toxic or Oxygen gases
• Infrared XP version
• SIL 2 high reliability
• IP 66
• Aluminium or Stainless Steel version

Applications

• Steel mills
• Petrochemical facilities
• Chemical industry
• Pharmaceutical industry
• Food industry
• Refrigeration industry
• Water treatment

Our products are always application-driven, solution-oriented.
Options include:

• OLCT 100 transmitter with 4-20 mA output
• OLC 100 detector with a Wheatstone bridge output for detection of combustible gases

IR Sensor

The infrared sensor provides detection of CO2 and refrigerant gases and is warranty 2 years.

OLCT 100 XP

Explosion-proof version is equipped with a catalytic, electrochemical or semiconductor sensor, for detection of combustible, toxic gases or oxygen.

OLCT 100 IS

Intrinsically safe version is equipped with an electrochemical sensor for detection of toxic gases or oxygen.

OLCT 100 XP IR

Explosion-proof IR version is equipped with an infrared sensor for detection of CO2 , SF6 and some freons.

OLCT 100 XP HT

High temperature explosion-proof version for detection of combustible gases up to 200°C. High temperature cable included: 5, 10, 15 meter lengths.

Reliability

The OLC(T) 100 is SIL 2 certified by INERIS, according to the EN 50402 standard, which corresponds to IEC/EN 61508 for gas detectors.

Unique advantages providing the solution you need

Design advantages

Pre-calibrated sensors for detection of:

• combustible gases: LEL catalytic and IR
• toxic gases
• oxygen

Alarms

• 2 integrated gas alarms with relays
• 1 fault alarm with relay

Inputs

Series 80 sensors have up to 9 glands dedicated to cable wiring Design advantages:
The minimum configuration includes:

• 1 electrical input dedicated to a sensor.
• two 4-20 mA or binary inputs. This configuration allows any other sensor from the network to be recognized (e.g temperature sensor, emergency stop, flame detector, smoke detector).

Outputs

• 4/20 mA with smart signal processing
• analog signal 4-20 mA
• data signals between 0 and 4 – 20 and 25mA

The transmitted signal, between 0 and 3.2 mA and above 20 mA, can be processed to interpret and identify a wide range of trouble parameters such as: line faults, sensor faults, embedded electronics faults, ambiguity resolution, inhibition of calibration, maintenance call (initial drift or drift over time).

• RS485 (1200 bauds, 38kb Modbus ASCII for MX 62).

The RS485 link gives access to :
– sensor measurement
– status and default
– internal relay management

Relays

The relays are 2A / 250 VAC type with potential free SPDT contacts.

Two types of relays:

• 2 gas alarm relays or supplementary inputs
• 1 fault relay

The relays are actuated either

• directly by the sensor electronics or supplementary
  inputs, or
• from the MX62 central unit or the control system to which the sensor is connected.

The relays can be

• in safety mode or not,
• triggered on increasing or decreasing alarms,
• manually* or automatically acknowledged.
• * By remote control, by pressing an external pushbutton connected to the dedicated binary input, by acknowledging on the MX 62 unit or the control system to which the sensor is connected.

Alarms

• 2 integrated gas alarms with relays
• 1 fault alarm with relay

Technical advantages

Stand-alone central unit
For relay control, the OLCT 80 can operate as a standalone unit: an indisputable advantage in a classified explosion risk zone.

Flexibility of connection modes
OLCT 80 sensors can be connected either:

• in loop (opto-isolated – up to 16 sensors),
• 4-20 mA,
• under direct power and operate as a central unit.

Operation traceability
The operator can check records locally for the most recent time-date stamped events.

Communication
Remote dialogue with the sensor using IR remote control.

Measurement power supply redundancy
Independent ports allow a redundant connection to the measurement unit.

Low power requirements
The leading edge technology used in the OLCT80 transmitter makes it very energy efficient. This major advantage means that more sensors can be connected, with smaller wire cross-sections and over greater distances.

Logistic advantages

Loop arrangement
The transmitter is perfectly adapted to mounting and connection to the digital fieldbus loop of the MX 62 unit. Supporting 1 to 3 digital addresses:

• the sensor block (detection element),
• the two 4-20 mA auxiliary inputs.

Certification

The OLCT80 Series is certified to the specifications required by standards EN 50054, 45544 and 50104 (environmental standards, explosive and toxic gases and oxygen) and to the specifications of standards EN 50270, EN 6052 (electromagnetic compatibility, ingress protection).

OLCT 80 uses digital logic and software technologies.
The sensors are protected and in compliance with the specifications of standard EN 51271:

• analog and digital values track each other
• homogeneity of digital resolution and response time with the specifications required
• internal self-diagnostics

Ordering Information

Accessories

A Calibration cup (6331141) allows introduction of calibration gas on the sensor
B Bypass adapter (6327910) allows measurement of samples
C Splash guard system (6329004) protects the detector from liquid projections
D Remote gas introduction head (6327911) allows introduction of gas without opening the detector
E Removable protective filter (6335975) protects the sensor against projections and dust
F Duct measurement kit (6793322) allows gas monitoring in a duct
G Mounting bracket (6322420) allows the mounting of the detector to the ceiling
H Protective cover (6123716) protects the detector against bad weather conditions or against direct sun radiations
I Adapter plate (6793718) allows the replacement of another OLDHAM detector without redrilling
J Wall mounted collecting cone (6331169) for use with lighter-than-air gases
K Ceiling mount collecting cone (6331168) for use with lighter-than-air gases

Product Data Sheet