DigiTrace RAYSTAT-ECO-10 Manuale - Pagina 4

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Description

RAYSTAT-ECO-10 is an electronic controller with display, advanced alarm

facilities and the capability of switching large currents.

The RAYSTAT-ECO-10 is designed to control heating cable systems. Heating

cable can be controlled either directly by the RAYSTAT-ECO-10 or via a con-

tactor.

Direct switching of heating cables is possible for heating loads up to 25 A.

For heating loads greater than 25 A indirect switching via a suitably rated

contactor controlled by a RAYSTAT-ECO-10 is necessary.

Installation and all wiring must be in accordance with applicable regulations.

The device must be installed in non hazardous areas only.

Tyco Thermal Controls offers other controls for use in hazardous areas.

Technical data

Supply voltage:

230 Vac. +10%/–10%, 50/60 Hz (6V leakproof

maintenance-free non-rechargeable battery

incl. for programming without power supply)

Main relay:

max. 25 A, 250 Vac. Resistive

Heater operation on

sensor error:

programmable: ON or OFF

Set point T range:

0°C to + 30°C

Accuracy:

±0,5 K at 5°C

Operatingtemperature:

–40°C to +40°C ambient

User interface:

4 x 7 segment digital display

4 push buttons

alarm relay, max. 2 A, 250 Vac. (Potential free)

Power terminals:

3 x 0,75 mm

Alarm terminals:

(3 + ) x 0,75 mm

Sensor terminals:

(3 + ) x 0,75 mm

Heater terminals:

(2 + ) x 0,75 mm

Enclosure

Exposure Temperature:

–40°C to +80°C

Ingress Protection:

IP 65

Entries:

2 x M25, 1 x M20, 1 x M16

Size:

120 x 160 x 90 mm

Weight:

approx. 800 gr.

Material:

polycarbonate

Lid fixing:

4 captive screws

Mounting:

on a wall or directly on the pipe using support

brackets, SB-100 / SB-101

to 4 mm

to 2,5 mm

to 4 mm

T sensor

Type:

3-wire Pt 100 according to IEC Class B

50 mm x ∅ 6 mm

Sensor head:

* An external Pt 100 sensor can be connected, the sensor cable can be ex-

tended with a 3-core shielded cable of 20 Ω max. per conductor (e.g. up

to 150 m with a 3 x 1.5 mm

cable)

Functional description

The Raystat-ECO-10 Controller is used to control heat-tracing freeze protec-

tion systems based on ambient temperature. The controller adjusts the

power of the heating cable by energizing the circuit for a percentage of a

complete cycle. This percentage is determined based on the ambient tem-

perature, the set point, and the minimum expected ambient temperature. The

full cycle time is influenced by pipe diameter.

For example, if the ambient temperature is halfway between the minimum

expected ambient temperature and the set point, the heating cable will be

energized for 5 minutes and be off for 5 minutes (for the smallest pipe size

selected). The actual duty-cycle periods and ratios vary, depending on the

ambient temperature and the above mentioned parameters. This algorithm is

called Proportional Ambient Sensing Control (PASC).

If you are unsure about the min. expected ambient setting, set it to a higher

rather than a lower value to prevent freeze-ups.

In the event of an error, the alarm relay switches and an error code shows on

the display. It is possible to program the status of the heating cable (ON or

OFF) in case of a sensor error.

The unit is fitted with a battery so that programming can be done on the

bench prior to mounting in the working location (see Operational description,

page 11).

Display

RAYSTAT-ECO-10 has a digital display. The three left hand digits 9a are the

value display and the right hand digit 9b is the status display.