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U N I V E R S A L M OTO R C O N T R O L L E R U M C 1 0 0 . 3 | M R P 3 1 . 0 M O D B U S T C P C O M M U N I C AT I O N M O D U L E M A N U A L
Modbus line with MRP31.0 mounted outside a drawer using single mounting kit (SMK3.0)
The following figure shows a simplified 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 benefits:
• Modbus address is stored in the Modbus communication interface in addition to the UMC100.3. In case of a drawer re-
placement 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 accidentally start the
wrong motor because of swapped drawer.
Required grounding of the Modbus cable is not shown in this figure.
Modbus-Master
L
T
Network
Length
Termination active
(1)
5
(4)
Termination active
(2a)
(2b)
5
X1
max. 3m
(1) 24V DC supply for the
MRP31.0 communication
(3)
interface. This lets the
MRP31.0 stay active even
in case the drawer is
withdrawn.
(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).
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