Modbus Line With Mrp31 Mounted Outside A Drawer Using Single Mounting Kit (Smk3.0) - ABB MRP31.0 Technical Description

Modbus line with MRP31 mounted outside a drawer using single mounting kit (SMK3.0)

The following fi gure shows a simplifi ed diagram on how to connect the UMC100.3 to a Modbus network if the UMC100.3 is
inside a drawer and the Modbus communication interface is mounted outside the drawer e.g. in the cable compartment. In
drawout systems this solution has several benefi ts:
– Modbus address is stored in the Modbus communication interface in addition to the UMC100. In case of a drawer
replacement the new - not addressed - UMC100.3 takes over the bus address automatically.
– Swapping of drawers detected if "Address Check" in UMC100.3 enabled. I.e. it is not possible to accidently start the
wrong motor because of swapped drawer.
Required grounding of the Modbus cable is not shown in this fi gure.
Modbus
Master
L
Network Length T
Issue: 09.2014
Termination active
(1)
5
(4)
Termination active
(2a) (2b)
5
X1
max. 3m
- 11 -
(1) 24V DC supply
for the MRP31
(3)
communication
interface. This lets
the MRP31 stay
active even in case
the drawer is with-
drawn.
(2a) Ready made
connection cable
from SMK3.0 X1 to
backside of drawer.
(2b) Ready made
connection cable
from inside drawer
to UMC100.3 X1
(3) UMC100.3
mounted inside a
drawer
(4) Modbus
communication
adapter with
single mounting kit
(SMK3.0).
Technical description MRP31.0