MEMOLUB
®
HPS User’s Guide
Page
10 of 39
PLI,
LLC
the on-off switch of the machine on which it is being used. Extension cables and
connectors (as shown in picture at left) are supplied as a part of this system, and relays are
available.
When the relay is closed (machine is operating) the MEMOLUB
®
operates under its own
battery power and under control of the MEMO program. Upon initial closure of the relay,
the MEMOLUB
®
goes through an immediate output cycle and then reverts to control of
the MEMO program, except when the MEMO is fitted with all three timing rings (white,
red, and black). In this case, the MEMOLUB
®
EPC will complete approximately 10
continuous cycles each time power is supplied, before resuming its normal programming.
In any case, when the relay is open the MEMOLUB
®
ceases operation.
The relay may also be controlled by a PLC, permitting ejection cycles to occur based
upon cumulative hours of machine runtime, clock hours, or some other event determined
by the PLC. For an output cycle to occur, the PLC must close the relay for at least 15
seconds, and there must be a 60-second interval between output cycles. The MEMO
program is not used when operating under PLC control; however a white timing ring
should be in place.
When operating under External Power Control (EPC) the life of the lubricant cartridge
cannot be determined by the setting of the MEMO program. It will therefore be necessary
to estimate cartridge change-out based on the MEMO setting and normal machine runtime
hours or, if used with a PLC, other criteria being used to control ejection cycles.
When the MEMOLUB
®
EPC is operating under PLC control, the PLC can calculate the
cartridge change-out by counting the number of output cycles ordered, and considering
the programmed output volume and lubricant cartridge size.
Relay contacts must be gold-plated, and the type of relay used will be dictated by the
application. Furthermore, the distance between the MEMOLUB
®
EPC and the relay will
determine the extension-wire gage and the connector sizes. Refer to the price sheets or
contact PLI, LLC for pricing and availability of relays, cables, and connectors.
4.2 The
MEMOLUB
®
EPS: 4.5VDC, 12VDC & 24VDC Powered
The EPS (External Power Supply) version of the MEMOLUB
®
HPS operates from an
external power source- 4.5VDC, 12VDC or 24VDC- bypassing the unit’s battery
chamber. A lead-wire extends from the bottom of the lubricator, and must be connected
to an external power source in order to operate. Extension cables and connectors are
provided by PLI, LLC to facilitate this connection.
External Power may be supplied continuously from a transformer, in which case the
MEMOLUB
®
EPS will operate under program control of the MEMO. Functioning will
be identical to that of the standard MEMOLUB
®
HPS except when the MEMO is fitted
with all three timing rings (white, red, and black). In this case, the MEMOLUB
®
EPS
will complete approximately 10 continuous cycles each time power is supplied, before
resuming its normal programming.
