Heinrichs Messtechnik GmbH
OPERATING MANUAL TMU / UMC3
Page 43 of 122
5.
Electrical Connections UMC3
Mains connections and their protection classes
Auxiliary power
(1)
19 V to 36 V DC (nominal 24 V DC)
24 V AC
+ 5 %, − 20 %
50/60 Hz
90 V - 265 V AC
50/60 Hz
Power input
7.5 VA
Main fuse:
5x20 mm IEC 60127-2
The mains fuse of the UMC3 can be found in the Ex-d electronic
compartment on the middle PCB behind the power input connector.
Main voltage
rated Current rated voltage breaking capacity
90V ... 265V AC
400mAT
250V AC
1500A / 250V AC
24V AC
800 mAT
250V AC
1500A / 250V AC
19V ... 36V DC
800 mAT
250V AC
1500A / 250V AC
Table 10: Fuse properties
Fuse Type: Little Fuse Series 0215.250 HXP
Wiring diagrams
Terminal Designation of the Power connections
Transmitter Type
Pin designation
Ex Type of protection
Standard
Ex ia
Ex eb
(Non Ex)
UMC3
L, N and PE
-
x
x
Table 11: Power Terminals Designation
On DC Voltage devices, L represents the “
+
” and N the “
-
“ of the supply lines.
Netzanschlussklemmen UMC3
UMC3 Electronic stack