Selection Guide
Alarm Dialers  
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 Model  
OMA-GUARD-IT
 
OMA-VM500-3
 
OMA-VM500-3HT Series
 
OMA-VM500-4 Series
 
OMA-VM500A-6
 
OMA-VM505
 
OMA-VM520
 
OMA-VM540
 Description  
Rugged Automatic Alarm Dialer
 
OMEGAPHONE® Automatic Alarm Dialer for Temperature and Power Status
 
OMEGAPHONE® Automatic Alarm Dialer for Temperature, Relative Humidity and Power Status
 
OMEGAPHONE® 7 Channel 4 to 20 mA Input Alarm Dialers
 
OMEGAPHONE® 8 Channel Input Alarm Dialers
 
OMEGAPHONE® 8 Channel Temperature Alarm Dialers
 
OMEGAPHONE® 4 Channel Temperature Alarm Dialers
 
OMEGAPHONE® 8 Channel Input Alarm Dialers
 Starting Price  
£635
 
£174
 
£199
 
£412
 
£332
 
£342
 
£565
 
Consult Sales
 Number of Inputs  
4
 
2
 
3
 
9
 
9
 
8
 
4
 
8
 Type of Input  
Individually Selectable Analog 4 to 20 mA, or Digital (Contact Closure)
 
Integral Temperature, Power Status
 
Temperature, Relative Humidity, Power Status
 
7 Isolated Analog 4 to 20 mA Inputs, One Digital Dry Contact Input, Power Status
 
8 Inputs Selectable for Digital (Contact Closure) or 24 Vac/Vdc
Power Status
 
8 Temperature Inputs for PT 1000 RTD, 2 NC Dry Contact Inputs, Power Status
 
4 Temperature Type K Thermocouple Inputs, 1 NC Dry Contact Input, Power Status
 
4 Temperature Inputs for PT 1000 RTD, 4 Powered Inputs (12 Vdc), 1 NC Dry Contact Input, Power Status
 Type of Enclosure  
Rugged Steel Wall Mount or Panel Mount
 
Plastic Desktop
 
Plastic Desktop
 
Plastic Wall Mount
 
Plastic Wall Mount
 
Plastic Wall Mount
 
Plastic Wall Mount
 
Plastic Wall Mount
 Type of Message  
User Recordable Digital Message
 
User Recordable Digital Message
 
User Recordable Digital Message
 
User Recordable Digital Message
 
User Recordable Digital Message
 
User Recordable Digital Message
 
User Recordable Digital Message
 
User Recordable Digital Message
 Programming Method  
Phone
 
Phone
 
Phone
 
Phone
 
Phone
 
Phone
 
Phone
 
Phone
 Number of Phone Numbers  
8
 
4
 
4
 
4
 
4
 
4
 
4
 
4
 Battery Backup  
20 Hours (requires OMA-GBB Battery Backup - ordered serparately)
 
4 hour standard (20- or 30-Hour Optional)
 
4 Hour Standard (20- or 30-Hour Optional)
 
4 Hour Standard (20- or 30-Hour Optional)
 
4 Hour Standard (20- or 30-Hour Optional)
 
4 Hour Standard (20- or 30-Hour Optional)
 
4 Hour Standard (20- or 30-Hour Optional)
 
4 Hour Standard (20- or 30-Hour Optional)
 Compatible with Pagers  
Yes
 
Yes
 
Yes
 
Yes
 
Yes
 
Yes
 
Yes
 
Yes
 Special Features  
Built-in Surge protection, Alarm Relay Output
 
Programmable High and Low Limits for Temperature
 
Programmable High and Low Limits for Temperature and Relative Humidity
 
LCD Display, Isolated Inputs Prevent Ground Loops, Alarm Relay Output, Local Audible Alarm
 
Alarm Relay Output (Remote Control Relay Operation Optional), Local Audible Alarm
 
LCD Display, Alarm Relay Output, Local Audible Alarm, Optional Ethernet Data Collection
 
LCD Display, Alarm Relay Output, Local Audible Alarm, Optional Ethernet Data Collection
 
LCD Display, Alarm Relay Output, Local Audible Alarm, Optional Ethernet Data Collection