BARTEC ComEx 07-352 Control and Indicating Station

Overview

The BARTEC ComEx Global control and indicating station, type 07-352, is a modular local control station for hazardous areas. It gives operators push buttons, emergency stops, selector and key switches, pilot lights and potentiometers next to the equipment they control, such as a pump, a motor, a conveyor, a gate or a fan, while the station itself is certified for Zone 1 and Zone 21. BARTEC designed the system so that standard single, double and triple GRP enclosures can be fitted with a wide choice of actuators and modules, which lets one family cover both standardised stations and customised layouts. The range is certified for global markets under ATEX, UKEX, IECEx and UL.

Seven Star LLC supplies the BARTEC ComEx 07-352 station on request to electrical contractors, motor control panel builders and plant maintenance teams in Oman and the GCC, with engineering support in Muscat. Local control stations are needed in large numbers on any process plant, and a modular design with clear ordering codes makes it easier to standardise station layouts across a project and to keep a small stock of modules for repairs.

Operating Principle

Inside a BARTEC ComEx station, each actuator on the front of the enclosure drives a separate switch, indicator or potentiometer module mounted behind it. The certified protection concept combines flameproof (Ex db) and increased safety (Ex eb) protection, marked Ex db eb IIC T6 Gb. Where intrinsically safe signals are used, for example for illuminated indicators or push buttons wired to an Ex i input, the station is certified Ex db ia IIC T6 Gb. For combustible dust, the marking is Ex tb IIIC T80 °C Db.

This combined approach means that standard control voltages can be switched inside the hazardous area without a heavy flameproof enclosure for the whole station. The modules occupy one slot each, while four-pole switch modules and large control switches use two slots and need at least a two-gang enclosure. A maximum of two ComEx devices can be combined, and the enclosure is rated up to IP67 and NEMA 4X for outdoor installation.

Engineering Design of the BARTEC ComEx

Three standard GRP enclosures are available: the single type 07-3521 at roughly 89 × 88 mm, the double type 07-3522 at about 91 × 130 mm, and the triple type 07-3523 at about 93 × 176 mm, each 78.4 mm deep. The BARTEC ComEx enclosures and modules are rated for service temperatures from -55 °C to +85 °C, actuators from -55 °C to +70 °C, and cable glands from -55 °C to +70 °C or +75 °C. Terminals accept conductors from 0.75 mm² to 2.5 mm² (18 to 12 AWG), and the station is approved for altitudes up to 2000 m.

The actuator list in the data sheet covers universal and labelled push buttons (START, STOP, ON, OFF, I, O), double push buttons, mushroom buttons, emergency stops in pull-to-release and twist-to-release versions with or without shroud, selector switches in latching and momentary variants, and key-operated switches. Switch modules come as 2 NC, 2 NO or 1 NO / 1 NC with silver or gold-plated silver contacts, and the pilot lights and illuminated indicators are available in red, green, yellow, white and blue.

Key Features

The BARTEC data sheet for the ComEx 07-352 station highlights the following:

• One modular system covers standard and customised local control and indicating stations.
• Single, double and triple GRP enclosures accept one, two or three modules.
• Stations are certified for Zone 1 and Zone 21 under ATEX, UKEX, IECEx and UL (CEC and NEC).
• Ingress protection reaches up to IP67 and NEMA 4X for outdoor process areas.
• Emergency stop, push button, selector, key switch, pilot light and potentiometer options are available.
• Four-pole switch modules and large control switches can be fitted for motor and main switching duties.
• Enclosures and modules are rated for service temperatures from -55 °C to +85 °C.
• Gold-plated contacts are available for low energy signals to PLC and safety systems.

Industrial Applications

Typical BARTEC ComEx installations are local start/stop and emergency stop stations beside pumps, compressors, agitators and fans; hand-off-auto selector stations for motor control; local indication of running and tripped status; and speed setpoint stations with a potentiometer for variable speed drives. In Oman these stations are used on production and gathering facilities, gas plants, refinery and petrochemical units in Sohar and Duqm, fuel terminals and pharmaceutical or chemical plants, where the GRP enclosure resists corrosion from coastal air and process chemicals.

Seven Star LLC can supply BARTEC ComEx stations to your ordering code or help build the code from a control station schedule. Many plants also use metal-bodied stations from other makers, and we supply alternatives such as the Cooper Crouse-Hinds EFSC215 pushbutton control station and the Cooper Crouse-Hinds EDS225 control station. For mobile work in the same areas, BARTEC field devices such as the Bartec EXguard mobile gas detection system can be included on the same BARTEC ComEx order.

Technical Specifications

The BARTEC ComEx specifications below are taken from the BARTEC data sheet for the ComEx control and indicating station (03-0330-1215, REV-A-12-2023).

How to Order

Send Seven Star LLC an RFQ with the BARTEC ComEx ordering code, or a list of the actuators, labels and contact arrangements required at each station, and our instrumentation division will confirm the configuration, availability and lead time. The BARTEC ComEx 07-352 data sheet is available for download on this page. Seven Star LLC supplies BARTEC explosion-protected control equipment to contractors and plant operators in Oman and the GCC, with support from Muscat.