Doc. No.: M1500 Rev. 5
Page 87 of 127
• 67733 Gross Point Road 900 Santa Fe Dr.
Doc. No.: M1500, Rev. 5
Page 87 of 127
67733 Gross Point Road 900 Santa Fe Dr.Doc. No.:
M1500, Rev. 5
Page 87 of 127
• 67733 Gross Point Road 900 Santa Fe Dr.
•
Appendix E – OM4 Output Module Option
The OM4 Output Module expands the tank-gauge console functions by allowing up to 2 (two) OM4 units each
with 4 (four) relay positions for a total of 8 relays. The OM4 communicates with the controller via Petro-Net
™
and is powered by a 12 VAC wall pack source that is supplied with the unit. See the wiring instructions inside
the OM4 unit for the correct Petro-Net
™
communications and power wiring connections.
NOTE: See the tank-gauge console Configuration Manual for information on programming the alarms, events
and Output Module relay associations.
Some common OM4 functions include:
• Turn off a submersible pump when low product is sensed in a tank.
• Activate an alarm when high product is sensed in a tank.
Safety Precautions
DO NOT connect the OM4 Output Module directly to a submersible
pump! The OM4 controls pumps INDIRECTLY, through relays or
contactors.
High voltages exist inside the OM4. Only qualified technicians should
open the unit.
Output relays in the OM4 are not intrinsically safe! Before working on the
OM4 Output Module, disconnect all power, including power to and from
the relays.
DO NOT place probe and/or sensor wiring in conduit that contains wiring
for devices that are connected to the OM4 Output Module.
Codes
Relay wiring is classified as Class 1 wiring. Installations must be in accordance with the National Electrical
Code (NFPA No. 70) and the Automotive and Marine Service Station Code (NFPA No. 30A). It is the installer’s
responsibility to investigate and obey any applicable local codes in the country\county of installation.
Hazardous Area Definition
A fuel dispenser is a hazardous area as defined in the National Electrical Code. Do not mount the OM4 Output
Module within a hazardous area. Do not attach this unit to any devices that are located in the hazardous area.
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