ANALOG ALARM UNIT 8 programmable channels Model ALAN-8
Description
The device ALAN-8 (Multi) has the following characteristics:
1. Temperature sensor type J from -200
o
C to +950
o
C.
2. Temperature sensor type K from 0
o
C to +1350
o
C.
3. Temperature sensor type ΡΤ100 with 2 cables from -200
o
C to +850
o
C.
4. Temperature sensor type ΡΤ100 with 3 cables from -200
o
C to +850
o
C.
5. Input signal 4 ÷ 20mA with analysis 0÷2000 units and adjustable scale.
6. Input signal 0 ÷ 20mA with analysis 0÷2000 units and adjustable scale.
The new scale can be shifted within the scale of the screen from -99÷2000 units.
7. Detection of cutline or short circuit line in the temperature sensors or 4÷20mA, 0÷20mA (sensor failure) in each channel.
8. Internal relay with one associated auxiliary contact 250VAC 10A for setting up an external alarm circuit in case of main power failure.
9. The input signal J, K, PT100 or mA for every channel can be set through parameters (ChM1÷ChM8). Each channel can be adjusted
independently. Τhe sensors/mA inputs are galvanic isolated from the outputs and power supply.
10. Each channel can be activated or deactivated and set or not to the average group which it will belong. Two groups of averages can be
defined.
11. The OVER FLOW and WRONG CONNECTION alarms activate only the general relay of the device while the LEDs and the display
are flashing. These alarms do not update the alarm’s table. With the parameters OOF1 to OOF8 we drive each line failure to one of
the 11 outputs. In addition, line failure deactivates all the alarms of the corresponding channel. A message OV F for the Over Flow
and WR C for the Wrong Connection of ΡΤ100 are displayed on screen. By pressing [RESET], the general relay is deactivated and
the corresponding LED remains on. If the parameter No.172 OFWC is set to OFF, the general relay is deactivated.
12. The OVER FLOW alarm is activated for: sensor type J over 950
o
C, sensor type K over 1350
o
C, sensor type PΤ100 over 850
o
C and
below -200
o
C, 4÷20mA below 3.9mA and over 20.05mA and 0÷20mA over 20.05mA.
13. The Set Points can function either as alarm or as limit supervisors by adjusting the parameter Νο.171 MoSP.
14. Possibility to invert the commands High and Low of Set Points.
15. Zero adjustment of each indication independently.
16. LCD screen of 2x16 characters.
17. Recording and depicting incoming alarms to screen numbered and in the order they appear.
18. Up to 32 alarms, 4 for each channel.
19. Capability to drive each of the 32 alarms to the outputs 1÷11 independently or in groups.
20. 8 LEDs, one for each channel.
21. Capability to drive the LED operation to the outputs for monitoring.
22. One general internal relay output 250VAC 10A for siren activation.
23. Time-delay for each of the 32 alarms. NOTE: Time-delay for the Average Set Point High and Low alarms is common to each channel
(parameters Tia1 to Tia8), for example time-delay Tia1 for channel 1 applies to AS1H and AS1L.
24. External RESET for connecting an external button.
25. Outputs can drive micro-relays of 30mA consumption. It is recommended to place the micro-relays near the device.
26. Power supply output 24VDC to supply micro-relays and transmitters of 4÷20mA (maximum current 300mA).
27. Screw terminal 0 Volt for supplying transmitters.
28. Power supply: 24VAC ± 10% 50/60Hz or 24VDC +30% / -10%
29. Maximum consumption: 10W
30. Internal power supply fast blow fuse: 1A
31. Internal fast blow fuse in the outputs: 315mA
32. Internal fast blow fuse in the network’s communication: 315mA
Technical specifications
1.
By setting the input signal to mA, we adjust the scale channels through the parameters (IN1L/IN1H÷IN8L/IN8H). For example, if the
input signal is 4÷20mA and we want the corresponding scale of channel No.1 to be -50÷+50, we adjust the parameter IN1H to +50
and afterwards we adjust the parameter IN1L to -50. If we try the opposite, that is adjusting first the parameter IN1L to -50, it won’t
be possible because the difference (IN1H – IN1L) can never be greater than 2000 units.
2.
Activation / deactivation of a channel. Each channel can be set through parameter (SCh1÷SCh8) with possible values (-1÷2):
“-1” = channel deactivated, “0” = channel activated and doesn’t belong to any average group, “1” = channel activated and belongs to
average group No.1, “2” = channel activated and belongs to average group No.2
3.
The Set Points alarms, through the parameter No.171 MoSP, can function either as alarms or as limit supervisors.
A) Operating as alarm: When an alarm appears, the LED, the general relay and the corresponding output (1÷11) are activated. By
pressing [RESET] we deactivate them all. If an alarm still exists, the corresponding LED remains ON and switches to OFF when the
cause of the alarm disappears. B) Operating as limit supervisor: When an alarm appears, the LED, the general relay and the
corresponding output (1÷11) are activated. By pressing [RESET] we deactivate the LED and the general relay but the output (1÷11)
is not deactivated. It will be deactivated only if the cause of the alarm disappears. This operation is suitable for High and High-High
surveillance.
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