ProSoft Technology 5228-DFNT-HART - Manual (Page 90)

Reference ProLinx-HART ♦ ProLinx Gateway
Driver Manual HART Master with Analog I/O
Page 90 of 104 ProSoft Technology, Inc.
October 13, 2011
4.4 ProLinx 5108 / 5208 HART Field Connections
HART field instruments are divided into four types; A through D, depending on power
requirements and whether the device sinks or sources a bias or operating current from
the network. The following table defines the categories:
Type Description
A Type A field instruments sink direct current from the network and receive operating
power from the network.
B Type B field instruments sink direct current from the network but receive no operating
power from the network.
C Type C field instruments source direct current to the network and receive no operating
power from the network.
D Type D field instruments neither source nor sink direct current from the network, nor
receive operating power from the network.
On a given network channel, Type A, B, and D devices may be combined. Type C and D
devices may also be combined. Type A or B field instruments should not be combined
with Type C devices.
4.4.1 Connections for HART Analog Point-to-Point Devices
The ProLinx 5108/5208 HART Analog interface module provides an isolated 24 Vdc
power supply output which may be used as a Network Power Supply. It is sized for
powering one HART Analog transmitter for each of the four HART Analog channels. This
internal isolated power supply can supply 24 Vdc @125 mA maximum, which is sufficient
to supply power to four HART analog transmitters, each connected in a point-to-point
fashion. Since each HART Analog channel is independent and completely isolated, any
mixture of loop powered and self powered transmitters may be accommodated. External
loop power, internal loop power, or both may be used to power any HART Analog
channel.
Important: The 5108/5208 HART Analog module may not be used for multi-drop
applications. Only one HART transmitter per channel is allowed.
4.4.2 Network Power Supply Requirements
Type Network Power Supply
A Required
B Required
C Must not be used.
D Not required, but may be used.
Note: The ProSoft 5108/5208 HART interface may be used with any HART field
device transmitter.