MEMOLUB
®
HPS User’s Guide
Page
11 of 39
PLI,
LLC
Regulated power may also be supplied by a PLC. In this case the program of the PLC may
be used to control the ejection cycles by periodically providing power to the
MEMOLUB
®
EPS. The frequency of lubricant ejection cycles can thus be controlled by
cumulative hours of machine runtime or clock hours, or some other event determined by
the PLC. The duration of the power pulse supplied by the PLC should be approximately 6
seconds. While the MEMO does not control the operation of the unit in this mode of
operation, it must still be in place with the white timing ring installed.
When operating under External Power Supply (EPS) the life of the lubricant cartridge
cannot be determined by the setting of the MEMO program. The frequency of cartridge
change-out is dictated by the PLC criteria (which controls the ejection cycles) and the
volume setting of the MEMO. The PLC calculates the cartridge change-out by counting
the number of output cycles ordered and considering the programmed output volume and
lubricant cartridge size.
PLI, LLC offers several types of power transformers that are compatible with the
MEMOLUB
®
EPS. If a transformer is purchased elsewhere, it should have the following
characteristics:
•
High efficiency
•
Overload/Over-Voltage protection
•
Short-Circuit Protection
•
Output Voltage: 4.5- 6VDC, 12VDC or 24VDC
•
Output Current: 2Amps peak demand, 1Amp working demand
Electrical Wiring
•
Α
t the outlet of the MEMOLUB
®
EPS:
+ Brown
- White
•
Length and type of wire to use between MEMOLUB
®
EPS and transformer:
AWG 20 (Cross section 2 x 0.5mm²) – 16 feet (5 meters) or less
AWG 18 (Cross section 2 x 1.0mm²) – 33 feet (10 meters)
In the case of pole inversion, the MEMOLUB
®
EPS will not work. The transformer can
only supply power to one lubricator at a time. For multiple lubricators, multiple
transformers must be used.
4.3 The MEMOLUB
®
24VDC PLC Controlled Version
The MEMOLUB® 24VDC-PLC Controlled model lubricator is especially designed for
PLC-controlled machinery (or mobile equipment) where a 24VDC power supply is
available. The PLC supplies the power and controls the frequency of output cycles. It
is ideal for lubricating a wide variety of robots, conveyors, and OEM applications.
This model can be used for single-point applications or lubricating from 2 to 12 lube
points with a MEMOLUB® Multi-Point Lubrication System.
The MEMOLUB
®
24VDC-PLC Controlled model cannot be used with the Splitter-MEMO.
