Description
The SEC 3120 Dual Sensor provides dual interface capabilities for any and all SEC gas detectors. An optional IS barrier allows “hot” sensor replacement in rated locations. This allows the user to install pre-calibrated/pre-configured sensor boards without removing unit power while maintain EX rating. Removable circuit board stack and detachable connectors facilitate field wiring installation.
Features
- Dual sensor interfacing to enable like-sensor redundancy or control or dissimilar sensor types
- back lighted LCD for gas level/unit parameter display
- Four alarm/fault relays configurable for alarm set points, latching and multi sensor relay logic
- An isolated RS485 Modbus interface provides reliable communication in noisy environments and eliminates “ground Loop” problems
- Three magnetic switches for local configuration and calibration without compromising explosion proof protections
- Time stamped date logging using a removable non-volatile memory module. Module can be removed from the unit to allow remote data downloading and data archiving.
- Dual sensor interface capability
- Explosion proof
- Back lighted LCD display
- Low cost
- Plug and play toxic, oxygen and combustible gas sensors
- Self check system
- 4-20 mA output
- RS-485 interface (isolated)
- Alarm and fault relays
- Non intrusive configuration
- Non intrusive calibration
- Removable, non volatile, time stamped data logging memory stick
- Optional IS barrier
- Digital communication link to SEC 3000, SEC 3300, SEC 5000 and Millenium gas detectors
- Multi port housing for easy installation
Applications
- Petrochemical refineries
- Compost facilities
- Semi conductor
- Mining
- Pulp and paper mills
- Oil rig platforms
- Buildings
- Automotive industry
- Engine test rooms
- Sewage
- Parking garages
Specifications
| Outputs | Digital: RS-485 LAN Analog: 4-20 mA source type, max 1000 ohm load at 24 VDC supply voltage Relays: 3 alarm & 1 fault |
| Display | Back lighted LCD, LEDs for relay indication |
| Detection Method | Toxic: Electrochemical Combustible: Infrared |
| Operating Voltage | 18 to 32 VDC |
| Operating Current | 314 mA Max @ 24 VDC |
| Power Consumption | Nominal: 1.2 W Relays: Add 1 W Heater: Add 5.9 W |
| Temperature Rating | -40 to +40°C |
| Humidity | 0-99% rH non condensing |
| RFI | Built in filter reject RFI/EMI |
| Housing | Epoxy coated aluminum |
| Certification | CSA/NRTL CI I, Div 1, Groups B, C, D T5 |
| Dimensions | 5.25″ W x 5.3″ L x 4.95″ H |
| Weight | 6 pounds |
Gases & Ranges
| Gas | |
| Ammonia | |
| Arsine | |
| Bromine | |
| Carbon Monoxide | |
| Chlorine | |
| Chlorine Dioxide | |
| Diborane | |
| Ethylene Oxide | |
| Fluorine | |
| Formaldehyde | |
| Germane | |
| Hydrogen | |
| Hydrogen Chloride | |
| Hydrogen Cyanide | |
| Hydrogen Fluoride | |
| Hydrogen Peroxide |
Call
|
| Hydrogen Selenide | |
| Hydrogen Sulfide | |
| Nitric Oxide | |
| Nitrogen Dioxide | |
| Oxygen | |
| Ozone | |
| Phosgene | |
| Phosphine | |
| Silane | |
| Sulfur Dioxide |
Unit Status Chart
|
Current
|
Output
|
Status
|
|
4-20
|
mA
|
Normal measuring mode |
|
0.0
|
mA
|
Unit fault |
|
0.8
|
mA
|
Unit warm up |
|
1.2
|
mA
|
Zero drift fault |
|
1.6
|
mA
|
Calibration fault |
|
2.0
|
mA
|
Unit spanning |
|
2.2
|
mA
|
Unit zeroing |
|
4.0
|
mA
|
Zero gas level |
|
5.6
|
mA
|
10% of full scale |
|
8.0
|
mA
|
25% of full scale |
|
12
|
mA
|
50% of full scale |
|
16
|
mA
|
75% of full scale |
|
20
|
mA
|
100% of full scale |
|
>20
|
mA
|
Over range (>100%) |
Ordering Information
For pricing, please call AFC International at 1-800-952-3293, 219-987-6825 or fax 219-987-6826 or email sales@afcintl.com.
