AEG ME09 Installation, Operation And Maintenance Manual page 37

Mpro
2.1.4.1
Modbus
Modbus
2.1.4.1.1 Modbus
2.1.5
Mpro
S N Mpro
TRIP UNIT
Some Mpro Trip Units have two output relays that can be
assigned to the following func ons:
-- GF Alarm
-- Over-current trip (GF, INST, LT, ST)
-- Reduced Instantaneous (RELT) Ac ve
-- Protec ve Relays
-- Current Alarm 1
-- Current Alarm 2
-- Health status
The trip units must have the speci c op on enabled (as an
example protec ve relay must be present and enabled in order
to allow the func on to actuate the relay).
n addi on to the in- and outputs indicated above the Mpro type
N Trip Units also can receive inputs from external voltage
condi oners. All Trip Units can be op onally supplied by a +24
VDC control power supply.
(Note: external +24 VDC control power is required for
communica on.)
All trip unit types have a connec on to an auxiliary switch within
the breaker that senses the breaker's posi on.
2.1.4.1 COMMUNICATIONS
External +24 VDC control power is required for communica ons.
Mpro Trip Units of the S and N type can op onally support
Modbus communica on protocol. In addi on,
Modbus connec ons are made directly to wiring termina ons
located at the circuit breaker top. Internally all Modbus
connec ons are ran through the trip unit's top connectors,
which mate with a receptacle on the breaker frame.
2.1.4.1.1 Modbus
The Trip Units are fully compliant with Modbus Protocol. Full
details of the Modbus protocol can be found in the Modbus
Protocol Speci ca on.
Two wire Modbus 485 is supported.
The link Host may operate at a 300, 600, 1200, 2400, 4800, 9600
or 19200-baud rate.
2.1.5 OVER CURRENT PROTECTION func ons
The Mpro Trip Units can provide the following over current
protec ons:
-- Long Time (Protec on against Overload currents) LT
-- Short Time (Time delayed Protec on against Short circuit
currents) ST
-- Instantaneous
(Op onal Protec on against Short circuit currents) I
2.
1
2.1-04