Franklin Fueling Systems EVO Series, Reference Manual

Page: 7 / 20

7
Relay Module
The relay modules have two styles: a 10-amp module and a 2-amp module. The 2-amp module
is a non-intrinsically safe module that has 8 identical 2-amp SPDT (Single Pole Double Throw)
output relays. The 10-amp module has 6 identical 10-amp SPDT output relays. Each channel
has a fuse and three terminals. Each channel can be configured as normally open or normally
closed, with the power off, by wiring to the appropriate terminals. The relay module provides
another method of controlling a submersible turbine and can be used instead of TPI. The relay
programmed to control a submersible will send a high voltage motor activation signal to the
submersible controller to activate the turbine. This input programming is identical to TPI input
programming in which positive shutdown occurs when a programmed input is in an alarm state.
• AC input module- hook signals (hook isolation) for dispenser 1-2, 3-4 Unleaded
• 4-20mA- LS500 line leak transducer (required for Electronic Line Leak Detection (ELLD))
• Provide ability to energize turbine for testing and disable turbine in event of ELLD
alarm (positive shutdown)
• 2-Wire sensor module- 2 wires sensors located in unleaded STP (sump) and dispenser
1-2,3-4
• Sensor inputs programmed as inputs to a STP utilizing relay module channels will
disable the submersible in the event of an alarm and reenable once alarm clears
(positive shutdown).
• 3-wires sensors can be used the same way as 2-wire sensors but will disable the
submersible for any of the alarms associated with a 3-wires sensor. An individual
alarm such as product, cannot be isolated for positive shutdown. (Alarm-specific
shutdown with 3-wire sensors is explained in the section on logic conditions.)
NOTE: ELLD is not mandatory for this feature to work.
• A relay module can be wired two ways. Normal relay states can be wired as Normally Open or
Normally Closed (NC). When wiring relays for Positive shutdown, use Normally Open for safety
and simplicity. If NC relays are required, contact FFS Technical Service.