Features

[Corresponds to the trend to use SI for Alarm]

Use of SI which well correlates to the damage of the buildings or other structures on the Earthquakes is spreading in the Gas・Chemical Industries. SW-74S is the High-end Model which has the Alarm Function by SI in addition to te functions of SW-74.

[Flexible Alarm setting-up is possible]

SW-74 has independent each other 10 Alarm Outputs. Functions for Alarm generation can be internally selected out of Acceleration・Seismic intensity scale・SI individually. Alarm levels are also able to be set-up optionally. Therefore, it can output Alarm Signals not only of the fixed certain function by step but also of the mixed functions as acceleration and SI

.

 

[Addition of Functions (Comparison with SW-72R)]

1. Alarm 7 steps (10 steps in total)
2. FAULT Alarm
3. Earthquake Occurrence Record Display
4. Pickup Test

[Interchangeability to Existing equipments]

Block Diagram

System Compsition

Outward Drawing

Specifications

Processing Unit（SW-74SI）

MODEL	SW-74SI
Display Element	STN monochrome LCD with Touch Switch (Back Light Color: Green / Orange / Red < No Replacement necessary> LCD life: 50,000 hrs mean (at normal temp. 25℃)
Earthquake Monitoring	Current Time
Earthquake Occurrence	Time of Earthquake Maximum Acceleration, Seismic intensity scale, Alarm action
Earthquake Hold	Reset Button (Alarm, Buzzer lump reset)
Various kind Setting	Trigger, Alarm, Date & Time
Maintenance	Pickup Test, Earthquake Records
Extra Alarms	Alarm Step: Upper 7 Steps (Alarm 4～10) Individual setting (Acceleration,/Seismic Scale/ SI / Options) Alarm Setting 0.1～999.9 (Gal / Seismic intensity scale / Kine) (Setting Interval: 0.1Gal, 00 for Alarm OFF) (Seismic Scale is to be set in Measured Seismic Scale) Alarm Relay Contact:1a (Photo MOS Relay) Independent COM 2 points (ALM1～5, ALM 6～10, one each) Contact Rating: 200V・0.65A (AC/DC, Peak value)
Alarm Reset	a. External Reset Terminals (All Steps are reset by closing No voltage a Contact) b. Automatic Reset by an Internal Timer 1～9999sec (Setting Interval 1sec, 0 for Automatic Reset OFF
FAULT Alarm	1a / 1b Contact Switch over Contact Rating: 2A 30VDC (Max. Allowable Voltage / Current: 220VDC / 2A)
Alarm Buzzer	Alarm Setting 0.1～999.9 (Gal/Seismic Scale/Kine) (Setting Interval: 0.1Gal, 00 for Buzzer work OFF) (Seismic Scale is to be set in Measured Seismic Scale)
Serial 1	For External Display / For Maintenance (Switch over) For External Display (basing upon RS422):MC2 For Maintenance basing upon RS232C): MC1
Serial 2	For Earthquake Data Printing (basing upon RS232C): MC2
Uninterruptible Power Supply	Power Interruption Back up 10 minutes or longer (Recovery Stand- by time) Charge time 48 hrs or shorter ) No Back-up for Optional DC24V Power Supply)
Mounting	Wall Mount
Ambient Temperature	0～＋50℃
Ambient Humidity	10～85%RH
Power Supply	Single Phase (Option)
Power Consumption	100VA or less (For DC24V:70W or less)
Outward Size	Refer to Outward Drawing
Painted Color	Panel : Close to Munsell 5GYB/0.5 Casing: Munsell N6.0
Mass	Approx. 3Kg

Option

■Printer
A printer prints Acceleration Amplitude, Seismic Scale and Alarm Signal generation Time, mounted on the panel.

■Control Unit
A Control Unit makes reliability of the relay contact Output of the Alarm Signal to control or stop activation higher. An Alarm Signal is output when 2 units out of 3 generate such signals.

■Annoane Machies
By an Announce Machine hooked up with the Seismometer, Earthquake information is announced.