12
Endress+Hauser
HART Loop Converter HMX50
3.3 Connection
The removable terminal blocks simplify connection and control cabinet construction
significantly. These terminal blocks offer adequate space for the connection of leads with
core cross-sections of up to 2.5 mm² (14 AWG). The terminal blocks are coded with red
coding pins so misconnection of terminal blocks are eliminated.
3.3.1 Input Connection (field circuit)
Connecting the Field Circuit
1. Connect the field circuit to the blue terminals.
2. Observe the tightening torque of the terminal screws. The tightening torque is 0.5 Nm
... 0.6 Nm.
The intrinsically safe field circuit may be routed in the hazardous area with connection lines
in accordance with DIN EN 60079-14. You can connect the following field devices:
1. any separately supplied HART current circuit with transmitter or positioner connected
in parallel
Connection to terminals 2 and 3
2. a HART-capable active current source, e. g., a separately supplied HART measuring
transmitter Connection to terminals 2 and 3 with bridge between terminals 5 and 6
a 2-wire HART measuring transmitter, e. g., HART measuring transmitter with an analog
output signal of 4 mA ... 20 mA
The HART measuring transmitter is supplied by the isolated barrier
Connection to terminals 1 and 3 with bridge between terminals 4 and 5
BA00371FEN_1417.fm Page 12 Tuesday, August 15, 2017 4:08 PM
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