ABB extends its assortment of Electronic Products and Relays by an assortment of pluggable interface relays. Three product ranges are available: the CR-P range of pluggable PCB relays, the CR-M range miniature relays and the CR-U range universal relays.

The pluggable interface relays are available with 10 different coil voltages from 12V DC and 24V AC up to 220V DC and 230V AC. For all relays pluggable function modules are available. All relays are cadmium – and lead-free.

The main features of the three product families are as follows:

Pluggable PCB relays CR-P
- 1 or 2 change-over contacts
- 1 change-over contact with 250V / 16A
- 2 change-over contacts with 250V / 8A
- Logical or Standard socket
- Approvals: UL, CSA, GOST, VDE

Pluggable miniature relays CR-M
- 2, 3 or 4 change-over contacts
- 2 change-over contacts with 250V / 12A
- 3 change-over contacts with 250V / 10A
- 4 change-over contacts with 250V / 6A
- Locking lever for manual operation and fixing possibility
(DC versions blue colour, AC versions orange colour
- With or without built-in LED
- 4 change-over contacts optionally equipped with gold plated
contacts and LED
- Logical or standard sockets
- Approvals: UL,CSA, GOST, VDE,
 Lloyds Register Type Approval (4c/o type )

Pluggable universal relays CR-U
- 2 or 3 change-over contacts with 250V / 10A
- Locking lever for manual operation and fixing possibility
(DC versions blue colour, AC versions orange colour
- With or without built – in LED
- Approvals: UL, CSA, GOST, VDE, Lloyds Register Type Approval

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Crydom Solid State Relays (SSRs) are widely used in applications where controlling different types of motors is necessary. They are used for AC motor speed control, motor reversing, starting motors, soft starting and soft stopping of motors, motor starting switches of both single phase and three phase motors.

Crydom SSRs are also used to control DC motors.  DC relays can be used as a switch, for reversing DC motors, or using PWM (Pulse Width Modulation) for DC motor speed controls.

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The new CT-S range is ABB’s latest development of universal time relays. This range comprises of 13 single-function devices and 8 multifunction timers with up to 11 functions, offering a high flexibility in operation. All devices have adjustable time delays from 0.05 seconds to 300 hours in 10 time ranges. The new CT-S range is prepared for all markets world wide. The products are cULus 508, CB scheme, CCC, GL, RMRS, GOST approved and CE and C-Tick marked.

Characteristics of the CT-S range
• Control supply voltages:
     o Multi ranges: 24...48 V DC, 24...240 V AC
     o Wide range: 24...240 V AC/DC
     o Single range: 380...440 V AC
• Devices with:
     o 1 or 2 c/o contacts
     o 2nd c/o contact can be selected as instantaneous contact1)
• Remote potentiometer connection1)
• Control input with volt-free or voltage-related triggering e.g. to start timing, pause timing
• Sealable transparent cover for protection against unauthorized changes of time and threshold values
• Integrated marker label

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Finder has announced the new 10 Series light dependent relays, which have the ability to control lighting according to ambient light levels. These relays will be of particular interest to designers, specifiers and installers both of lighting and of lighting control systems, and will find applications in the automatic control of exterior lighting around factories, loading bays, schools, offices and similar areas where lighting is required for security or safety reasons during the hours of darkness.

There is a growing need to reduce energy consumption, maintenance and replacement costs by ensuring that essential exterior lighting is lit only during times when the ambient natural light falls below an acceptable level, and it is this requirement that the 10 Series has been developed to address.

The 10 Series relays feature an integral photoelectric sensor combined with innovative light feedback compensation circuitry designed by Finder, which prevents the controlled lighting from ‘hunting’ on and off due to the perceived increase in ambient light when lights are automatically turned on. This feedback capability is achieved by monitoring the effect of the controlled lighting over a ten-minute period, which ensures compatibility with slow starting gas discharge lamps. ON and OFF delay times are reduced to zero for the first three cycles, which aids set up and commissioning and reduces installation time.

The new family of relays includes both single-pole and two-pole output types rated at 16A, and also a miniature type, 10.51, with a single 12A output. The double output 16A 10.32 allows Live and Neutral switching, while model 10.41 has a single 16A NO output for Live switching.  All the relays in the series operate from either a 120V or 230V AC supply.

The ambient light switching level is adjustable in the range 1 – 80 lux, and the relays are capable of switching up to 2.3kW of incandescent or halogen lighting, allowing the switching behaviour to be optimised according to both the needs of the individual application and the physical location of the unit.

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Finder has announced the 13.12 Call and Reset Relay, which is designed to activate an alarm at a remote point and provide local indication of activation. The relay will be of particular interest to designers and installers of attendant call systems in hospitals and care homes, and to contractors involved in the provision of facilities into residential and commercial buildings where occupants may need to call for assistance.

An ageing population is creating a growing demand for both short-term and long-term facilities providing care and supervision - hospitals, care homes, assisted living developments, hotels and similar premises - and the means to summon assistance in these facilities is a fundamental requirement. The 13.12 relay is a conveniently packaged product that addresses this need, and which can easily be installed in new buildings or retrofitted in existing sites.

The 13.12 features dual outputs, offering the facility for both a remote alarm signal and a local indication of activation to be activated simultaneously. Independent set and reset inputs provide flexibility in the location of activation and acknowledgement points. The relay output contacts are rated at 8A, which means that they are capable of directly switching incandescent lamp loads up to 800W. Set and reset inputs are both continuously rated, so that no damage is caused to the product if it is inadvertently left permanently activated. The relays are suitable for 35mm rail or panel mounting if an additional bracket is used. The length of the cable run between the set/reset points and the unit can be up to 100m, allowing multiple units to be placed in a convenient centrally located control panel for ease of maintenance and space saving.

The 13.12 relays are housed in a compact 17.5mm single unit width rail mounting enclosure.

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Finder has announced the introduction of the 13.81 electronic step relay, which is designed for the pushbutton control of lighting. This step relay is particularly suited to complex multi-point installations.

The desire for more sophisticated and flexible control of lighting, coupled with the need to reduce material and installation costs, is influencing consultants, designers and installers of lighting control systems to consider using electronic relays, especially for applications where quieter operation than that of conventional electromechanical step relays is desired. They will be able to use the 13.81 electronic step relay in locations that have multiple entry points, or in large areas where a number of switching positions are required for the control of lighting. The unit will be of particular interest to lighting designers who wish to achieve easy central control of multiple light fittings.

The 13.81 allows the connection of up to 15 illuminated push buttons, to enable multiple switching points to be served with a minimum of wiring, and is capable of switching up to 3kW of incandescent or halogen lamp loads. Indirect control of lighting – isolated from the AC mains – means that lighter gauge wiring can be used between pushbutton and relay, while electronic operation is much quieter than conventional electromechanical switching and offers a longer life. The cable run between the pushbuttons and the relay can be up to 200m in length, providing flexibility of mounting location, especially in large areas such as warehouses and factories.

The 13.81 is housed in a compact 17.5mm wide enclosure for 35mm DIN rail mounting, and is suitable for consumer units.

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Crydom Solid State Relays (SSRs) are utilized in numerous medical applications. Crydom SSRs are used to control motors in hospital beds, examination tables, and rehabilitation equipment. SSR’s are also widely used for heating controls in sterilization equipment, blood warming units, and incubators.

Since Crydom SSRs utilize silicon for switching loads and therefore have no contacts that arc, contact contamination and the danger of sparking are eliminated. Coupled with an epoxy-filled encapsulation, the Crydom SSR is resistant to steam and other sterilization techniques.

The recent introduction of the Crydom MC series of SSR/controllers is an all in one solution that includes both a controller and a Crydom SSR in one package to control temperature, phase control, or soft start, soft stop functions.

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Finder has announced the launch of the 97.11 and 97.12 sockets for PCB mounting of its 46 series miniature industrial relays. These sockets allow engineers designing power control equipment to mount a plug-in power relay with robust terminals in a simple manner onto a PCB. They are particularly suitable for circuit boards where the ability to change power relays quickly is essential for maintenance and the minimising of downtime in the event of a fault.

There is a growing trend towards the use of PCBs in power control applications, but engineers wish to maintain the benefit of rapid component replacement that they enjoy with traditional plug-in rail mounted components – this is the need addressed by these new additions to the 97 Series of sockets.

The 97.11 and 97.12 sockets have a small 12.4mm x 32mm footprint, minimising board space requirements, and maintain the full 6kV coil-to-contact isolation specification of the relay. An integral retaining clip ensures that the relay is firmly retained when used in applications where they may be subject to shock or vibration, and the sockets carry C UR approval for the US.

The 46 Series relays, which fit the sockets, includes both single-pole and two-pole contact configurations for use in control panels and systems. The relays are fully terminal-compatible with the de-facto industry standard, with Faston spade/blade terminals that provide secure and reliable connections between the relay and the 97 Series socket.

The new sockets complete the line up of 46 series relay mounting options that already include a range of 35mm rail mounting sockets – the 97.01 and 97.02 screw connection models and the 97.51 and 97.52 screwless connection versions – as well as flange-mounting and direct-rail mounting adaptors that allow the use of either Faston or soldered connection to the relay terminals. All the 97 Series rail mounting sockets will accept the full range of 99.02 coil indication and suppression modules and the 86.30 bi-function, multi-range timer modules.

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October 25, 2007 - Crydom, an operation of Custom Sensors & Technologies (CST), announces the first solid state relays available on the market with UL approved short-circuit current ratings (SCCR). These relays facilitate industrial control panel builders' efforts to comply with the new article 409 from NEC and the latest version of UL508A, both request SCCR marking, by providing them with pre-approved ratings for SSR/fuse combination.

According to Dr. Oscar Montero, from the Crydom Global Technical Center, "Standard 5kA SCCR on power devices prevents panel builders from offering panels with higher ratings. Panels with a higher SCCR could be connected to electrical systems with different available currents bringing market advantages for panel builders. However, establishing a higher SCCR may represent significant challenges and additional costs for panel builders."

Crydom's approved ratings allow panel builders to establish the SCCR for the branch circuit where the relay is located without performing additional testing. The ratings can be added directly to the manufacturer's procedure. Hence, effectively reducing the time-to-market cycle for the panel and cost associated to compliance.

Crydom has obtained UL approval for SCCR by testing the combination SSR/Fuse under the "umbrella fuse" requirement allowing more flexibility to Crydom customers to mix and match SSR and fuses of different ratings.

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Finder has announced the launch of the 93.21 series multifunction timer socket, for use with the 34 series electromechanical and solid-state relays. The sockets are aimed at panel builders, systems integrators, OEMs and installers of control systems for machines and processes, and also for applications in building management systems (BMS). They are particularly suitable for use where space constraints are a major consideration, or where rapid output switching and long operational life are required.

The ultra slim sockets are only 6.2mm in width, making them ideal for use in systems where the available mounting space is minimal. Their multifunction and multirange capabilities, along with the ability to accept either plug-in electromechanical or plug-in solid-state relays, means that a single socket model is suitable for a wide range of applications, with the added benefit that the switching element is easily replaceable.

The timer sockets feature 4 time ranges with intervals ranging from 0.1 – 3s up to 0.3 – 6 hours, and 4 selectable timing functions – ON delay; ON pulse; Symmetrical recycling with ON start; and fixed pulse delayed. Precision of regulation over the entire scale is specified as ±5%, and maximum switching capacity is 6A.

The 93 series timer sockets operate at a DC or AC supply voltage in the range 12 – 24V. Both screw and screwless termination options are available for flexibility in integrating with both types of wiring system, and a tamper proof setting mechanism avoids accidental maladjustment. The sockets can be used with 20 way jumper bars, which helps to save time in wiring common connections.

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