GE Multilin 369 User Manual

2–12 369 MOTOR MANAGEMENT RELAY – QUICKSTART GUIDE
ELECTRICAL INSTALLATION CHAPTER 2: INSTALLATION
In addition the display module must be grounded if mounted remotely. A ground screw is
provided on the back of the display module to facilitate this. A 12 AWG wire is
recommended and should be connected to the same ground bus as the main relay unit.
The 369 relay will still function and protect the motor without the display connected.
2.3.5 Output Relays
The 369 provides four (4) form C output relays. They are labeled Trip, Aux 1, Aux 2, and
Alarm. Each relay has normally open (NO) and normally closed (NC) contacts and can
switch up to 8 A at either 250 V AC or 30 V DC with a resistive load. The NO or NC state is
determined by the ‘no power’ state of the relay outputs.
All four output relays may be programmed for fail-safe or non-fail-safe operation. When in
fail-safe mode, output relay activation or a loss of control power will cause the contacts to
go to their power down state.
Example:
•A fail-safe NO contact closes when the 369 is powered up (if no prior unreset trip
conditions) and will open when activated (tripped) or when the 369 loses control
power.
•A non-fail-safe NO contact remains open when the 369 is powered up (unless a prior
unreset trip condition) and will close only when activated (tripped). If control power is
lost while the output relay is activated (NO contacts closed) the NO contacts will open.
Thus, in order to cause a trip on loss of control power to the 369, the Trip relay should be
programmed as fail-safe. See the figure below for typical wiring of contactors and
breakers for fail-safe and non-fail-safe operation. Output relays remain latched after
activation if the fault condition persists or the protection element has been programmed
as latched. This means that once this relay has been activated it remains in the active state
until the 369 is manually reset.
The Trip relay cannot be reset if a timed lockout is in effect. Lockout time will be adhered to
regardless of whether control power is present or not. The relay contacts may be reset if
motor conditions allow, by pressing the RESET key, using the REMOTE RESET switch or via
communications. The Emergency Restart feature overrides all features to reset the 369.
The rear of the 369 relay shows output relay contacts in their power down state.
Note
In locations where system voltage disturbances cause voltage levels to dip below the
control power range listed in specifications, any relay contact programmed as fail-safe
may change state. Therefore, in any application where the ‘process’ is more critical
than the motor, it is recommended that the trip relay contacts be programmed as non-
fail-safe. If, however, the motor is more critical than the ‘process’ then program the trip
contacts as fail-safe.
2.3.6 RS485 Communications
Three independent two-wire RS485 ports are provided. If option (F), the fiber optic port, is
installed and used, the COMM 3 RS485 port may not be used. The RS485 ports are isolated
as a group.

GE Multilin 369 Specifications

General

Brand	GE
Model	Multilin 369
Category	Relays
Language	English