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Manual zz. Voltage rating. Over-temperature protection. Electrical connections. Connecting terminals. Mains supply and earth. Output 1. Output 2. Output 3, Alarm. Thermocouple input. Program recovery following loss of power. Abort conditions. Use in other applications, or failure to observe the installation instructions of this handbook may impair the safety or EMC protection provided by the controller.
It is the responsibility of the installer to ensure the safety and EMC of any particular installation. This instrument satisfies the general requirements of an industrial environment as described by EN and EN For more information on product compliance refer to the Technical Construction File. While every effort has been made to ensure the accuracy of the information, Eurotherm Controls shall not be held liable for errors contained herein. Unpacking and storage If on receipt, the packaging or the instrument are damaged in any way, do not install or commission the product.
Contact your nearest Eurotherm Controls agent as soon as possible. The packaging should contain an instrument mounted in its sleeve, two mounting brackets for panel installation and this operating book.
Certain ranges are supplied with an input adapter. General description Models and are digital temperature controllers. The and are valve positioning controllers.
The and are mounted upright, vertical and the and are mounted on their side horizontal. Two LED displays indicate the operating parameters. The top display indicates the actual value, PV and the lower display indicates the setpoint, SP.
Parameters and configuration values are set by use of the front panel keys. The PAR button selects the parameter and the up and down arrows are used to alter their value. Recalibration is not necessary for this procedure. Signals up to 25V can be accommodated by using input adapters in the linear input option. Linearisation is scaleable within the display range of to , with tenths display resolution. The controller is also equipped with a ramp to setpoint function.
This enables it to automatically adjust the setpoint to give a defined rate of change of the process temperature. In the programmer version, two ramps and two dwell periods may be set. The modular construction of the instruments allows up to three output channels to perform various functions. The instrument can be configured as a heat cool controller with one alarm, or a heat only controller with two alarms.
The heat output may be fitted with a dc output. For communications with a host computer system the instrument can be fitted with either an EIA or EIA digital interface. This enables the automatic recording of measured values on a printer, or the use of a proprietary supervisory system such as Eurotherm Controls ESP package. Contact your nearest Eurotherm Controls agent for repair. Caution: Charged capacitors Before removing an instrument from its sleeve, disconnect the supply and wait at least two minutes to allow capacitors to discharge.
Failure to observe this precaution will expose capacitors that may be charged with hazardous voltages. In any case, avoid touching the exposed electronics of an instrument when withdrawing it from the sleeve. Electrostatic discharge precautions When the controller is removed from its sleeve, some of the exposed electronic components are vulnerable to damage by electrostatic discharge from someone handling the controller.
To avoid this, before handling the unplugged controller discharge yourself to ground. Cleaning Clean the instrument sleeve and the front facia with an anti-static cleaner and a soft cloth. Do not use water or water based products to clean labels or they will become illegible. Isopropyl alcohol may be used to clean labels. Caution, refer to the accompanying documents I Functional earth ground terminal The functional earth connection is not required for safety purposes but to ground RFI filters.
Personnel Installation must only be carried out by qualified personnel, Enclosure of live parts To prevent hands or metal tools touching parts that may be electrically live, the controller must be installed in an enclosure. It is recommended that you use the rear terminal cover provided. Caution: Live sensors The fixed digital input and the non-isolated dc and logic outputs, are all electrically connected to the main process variable input.
If the temperature sensor is connected directly to an electrical heating element then these non-isolated inputs and outputs will also be live. The controller is designed to operate under these conditions.
With a live sensor, all cables, connectors and switches for connecting the sensor and non-isolated inputs and outputs must be mains rated. Wiring It is important to connect the controller in accordance with the wiring data given in this handbook. Take particular care not to connect AC supplies to the low voltage sensor input or other low level inputs and outputs.
Only use copper conductors for wiring connections, except for thermocouple inputs. Ensure that the wiring of installations comply with all local wiring regulations.
Ensure the correct polarity of signal connections. Power Isolation The installation must include a power isolating switch or circuit breaker. This device should be in close proximity to the controller, within easy reach of the operator and marked as the disconnecting device for the instrument. Overcurrent protection To protect wiring and the PCB tracking within the controller against excess currents, the AC power supply to the controller and power outputs must be wired through the fuse or circuit breaker specified in the technical specification.
Voltage rating The maximum continuous voltage applied between any of the following terminals must not exceed Vac:. The controller should not be wired to a three phase supply with an unearthed star connection. Under fault conditions such a supply could rise above Vac with respect to ground and the product would not be safe. Voltage transients across the power supply connections, and between the power supply and ground, must not exceed 2.
Where occasional voltage transients over 2. These units will typically include gas discharge tubes and metal oxide varistors that limit and control voltage transients on the supply line due to lightning strikes or inductive load switching. Devices are available in a range of energy ratings and should be selected to suit conditions at the installation.
Conductive pollution Electrically conductive pollution must be excluded from the cabinet in which the controller is mounted. For example, carbon dust is a form of electrically conductive pollution.
To secure a suitable atmosphere in conditions of conductive pollution, fit an air filter to the air intake of the cabinet. Where condensation is likely, for example at low temperatures, include a thermostatically controlled heater in the cabinet. Over-temperature protection When designing any control system it is essential to consider what will happen if any part of the system should fail. In temperature control applications the primary danger is that the heating will remain constantly on.
Apart from spoiling the product, this could damage any process machinery being controlled, or even cause a fire. Reasons why the heating might remain constantly on include:.
Where damage or injury is possible, we recommend fitting a tion unit, with an independent temperature sensor, which will Please note that the alarm relays within the controller will not conditions.
Under these conditions, as additional protection against electric shock, we recommend that the shield of the temperature sensor is grounded. Do not rely on grounding through the framework of the machine. When using relay or triac outputs it may be necessary to fit a filter suitable for sup pressing the emissions.
The filter requirements will depend on the type of load. In this case to meet the conducted emissions requirement, a suitable mains filter should be installed. Routing of wires To minimise the pick-up of electrical noise, the wiring for low voltage dc and particularly the sensor input should be routed away from high-current power cables.
Where it is impractical to do this, use shielded cables with the shield grounded at both ends. In general keep cable lengths to a minimum. Figure 2. Behind the instrument sufficient space should be provided for wiring. To assemble, turn the screw on the front fascia in an anti-clockwise direction and pull the instrument out of the sleeve.
Now slide the plug-in sleeve into the control panel cut-out from the front. The two mounting brackets are fastened on the left and right hand side behind the control panel and tightened with a screwdriver in a clockwise direction.
A torque limiter prevents over-tightening. For multiple installation in a control panel, the minimum spacings specified in Figure 2. The kit consists of two self-adhesive neoprene gasket rings, these seal the instrument to the instrument sleeve, and the sleeve to the front panel. The order number for the gasket kit is LA Before wiring, verify from the instrument label on the side which options have been built into the instrument and how the instrument is configured.
The terminals at the rear of the instrument are numbered from 1 to Terminal allocation is shown in Figure 2.
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