Omega Products OMA-VM500-4-B20 User Manual
OMEGAPHONE®7-Channel, 4 to 20 mA
Input Alarm Dialer
Model OMA-VM500-4
⻬ Monitors 7-Channels
of 4 to 20 mA Input,
One Dry-Contact Input,
and Power Status
⻬ Isolated Inputs
Prevent Ground Loops
⻬ Program Up to Four
20-Digit Phone Numbers
⻬ Works with
Telephone Pagers
⻬ Integral 4-Line LCD
⻬ Wall-Mount Enclosure
Model OMA-VM500-4 monitors up
to seven 4 to 20 mA inputs and dials
up to 4 phone or pager numbers if
any 4 to 20 mA input goes out of
limits, if the dry-contact input is not
in its programmed normal state,
or if there is a power outage. The
integrated voice tells the user which
input is out of limits. The user can
call the unit at any time to hear a
report on the input and power status.
The OMA-VM500-4 is easily
programmed over the phone.
Simply locate the unit in the area
where you want to measure the 4 to
20 mA inputs, plug in the phone line
and the power adaptor, turn the unit
on, and call the unit from another
phone or cell phone. Follow the
spoken instructions and the
instructions in the operator’s manual
to program the phone numbers
where you want the dialer to call in
case of an alert condition and the
upper and lower limits for the
4 to 20 mA signals. Then hang up
by pressing the “0” key on your
phone until the unit says “good-bye.”
The system is now
programmed and is
monitoring your facility
for 4 to 20 mA input
and power status.
Specifications
Number of Analog
Inputs: 7
Sensor Type:
Self-powered
4 to 20 mA output
sensors
Sensor Input:
Isolated, 20 Ω input impedance
Response Time: 50 ms
Accuracy: ±0.05 mA
High and Low Limits on
4 to 20 mA Inputs: Programmable
Scaling in Engineering Units
for Each 4 to 20 mA Input:
Programmable
Dry-Contact Input: 12 Vdc 10 mA
source; input is normally open
Telephone:
Standard RJ11 phone jack connection
Telephone Numbers: Stores up to
4 phone numbers up to 20 digits long
Personal Identification Message:
Records up to a 10-second message
over the phone
Operation:
Operates with answering machine
on the same phone line
Display: Integral 4-line LCD
Alarm Notification: Alarm siren
sounds and alarm relay closes if
any input goes out of limits
Alarm Cancellation: Pushbutton
on front of the unit silences the
alarm and cancels emergency
telephone calls
Alarm Relay Output:
5 A, 125 Vac
Alarm Buzzer: 85 dB
Power: Powered from included
120 Vac wall mount transformer
power supply
Battery Backup: 4-hour
rechargeable battery backup;
20 or 30 hours optional
Operating Temperature:
0 to 52°C (32 to 125°F)
Electrical Connections:
Plug-in terminal block
Dimensions:
117 H x 223 W x 57 mm D
(4.62 x 8.79 x 2.26")
Material: ABS plastic
Weight: 0.9 kg (2 lb)
Each unit comes with complete operator’s manual.
Ordering Example: OMA-VM500-4-B20, 7-channel automatic 4 to 20 mA alarm dialer with
20-hour battery backup and integral LCD display, OMEGACARESM, 1-year extended warranty
for OMA-VM500-4-B20 (adds 1 year to standard 1-year warranty), $652 + 65 = $717.
To Order
(Specify Model Number)
Model Number Price Description
OMA-VM500-4 $615 7-channel automatic 4 to 20 mA input alarm dialer
with integral LCD
OMA-VM500-4-B20 652 7-channel automatic 4 to 20 mA input alarm dialer
with 20-hour battery backup and integral LCD
OMA-VM500-4-B30 681 7-channel automatic 4 to 20 mA input alarm dialer
with 30-hour battery backup and integral LCD
CS-3791 150 Reference Book: Standard Handbook
of Electronics Engineering
Starts at
$
615
MOST POPULAR MODEL HIGHLIGHTED!
OMEGACARESMextended warranty program
is available for models shown on this page.
Ask your sales representative for full details
when placing an order. OMEGACARE
SM
covers parts, labor and equivalent loaners.
OMA-VM500-4, $615,
shown smaller than
actual size.
G-1
One Omega Drive | Stamford, CT 06907 | 1-888-TC-OMEGA (1-888-826-6342) | info@omega.com
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