ProComSol HM-APL-PCB User manual

HM-APL-PCB User Manual
MAN-1057 04/04/2023 Providing Advanced Process Communication Page 1
Products Since 2005
HM-APL-PCB User Manual
Introduction
The HM-APL-PCB converts existing HART transmitters to the new Ethernet Advanced
Physical Layer (APL) interface. The PCB offers an easy migration path for existing
HART Transmitters. The PCB can be modified to incorporate custom features or size
requirements (see HART-APL-DEV).
System Diagram
The complete HART to APL system consists of a HART transmitter, the HM-APL-PCB,
a 12Vdc power supply, an APL switch, an Ethernet switch, and a host device running a
HART-IP compliant App.
Figure 1. HART-APL System Diagram

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PCB Block Diagram
The HM-APL-PCB consists of the APL interface and the HART interface. Firmware
runs on a ST microelectronics microcontroller. Peripheral interfaces are available for
example, adding memory and analog measurement circuits.
Figure 2. HM-APL-PCB Block Diagram
HART Connections
A two terminal wire connector is used to make the connection to the existing HART
transmitter. A HART power supply is NOT needed. A loop resistor is also not needed.
The PCB supplies loop power to the HART transmitter. Note that polarity it important.
The HART + connects to the Loop + terminal of the HART device and the HART -
connects to the Loop - terminal.
Figure 3. HART Connections

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HART Polling Address
Using a HART Communicator, set the HART transmitter to Polling Address 1. This puts
the transmitter in a fixed current modem (4mA). This only needs to occur 1 time. Also,
the APL PCB uses Polling Address 1 to communicate HART as the default setting.
APL Connections
APL is a two wire Ethernet physical layer. APL also provides power to the APL
Transmitters. Each APL transmitter is connected via a twisted pair cable to a APL switch
or gateway. The switch/gateway supplies power to the individual APL transmitters.
APL Switch/Gateway
When deployed in the field, an APL Switch/Gateway is used. This device must be
intrinsically safe and rugged for industrial use. These devices are starting to become
available. However, for APL development and testing, a gateway EVM board made by
TI can be used. It is not for use in the field.
Low Cost Development Gateway Option
The TI EVM recommended is the DP83TD510E-EVM available from DigiKey, Mouser,
etc. The TI EVM setup requires an external 12Vdc supply. The diagram below shows
typical setup of the jumpers and headers and power supply connections.
Figure 4. TI EVM Board Configuration
Power Cable for Low Cost Gateway
A special power supply cable must be assembled when using the TI EVM Board. Below
is the wiring diagram.

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Figure 5. TI EVM Power Cable Wiring Diagram
APL-SW-3, Development APL Switch Option
An easier to use alternative to the low cost gateway option is the ProComSol APL-SW-3,
Ethernet-APL Switch, 3 Channels. This switch greatly simplifies APL connections to
Ethernet. It requires one standard 24Vdc power supply input. It provides APL
connections to 3 APL devices. It has an Ethernet port to connect to the Ethernet network.

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Figure 6. APL-SW-3 Connections
Switches
The PCB has two switches. SW1 is located near the board edge. It is used for board
development testing. It is no longer used. SW2 is located near the Bournes transformer.
It is used to reset the PCB.

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LED Indications
There are three LEDs. D4 is located near SW2. When Green, it means power is applied
to the board. D5 is located near J4. When blinking Orange, it means there is APL
network activity. When it is solid Green, no APL link is detected.
Headers and Jumpers
The board ships preconfigured for HART to APL adapter. All headers are blank.
J3 APL connector
Pin
1
Shield ground
Pin 2
Loop
-
Pin 3
Loop+
J5 I/O Header
Pin 1
Digital I/O
Pin 6
GND
Pin 2
Digital I/O
Pin 7
Analog In
Pin 3
Digital I/O
Pin 8
GND
Pin 4
Digital I/O
Pin 9
Analog In
Pin 5
GND
Pin 10
GND
J4 HART Connector
Pin 1
HART+
Pin 2
HART
-
J1 I/O header
Pin 6
I2CSDA
Pin 6
SPI SCK
Pin 7
I2CSCL
Pin 7
SPI MISO
Pin 8
UART TX
Pin 8
SPI MOSI
Pin 9
UARTRX
Pin 9
SPICS
Pin 10
GND
Pin 10
GND
Step by Step Connection Procedure Using Low Cost Gateway
1. Power up the HART transmitter and verify loop current is less than 9mA.
2. Remove connections from Step 1 and connect the Loop + to the HART + terminal on
the PCB. Also connect Loop - to the HART - terminal on the PCB.
3. Connect the APL terminals to the APL terminals on the TI demo board.
4. Connect a 12Vdc power supply to the APL interface using the wiring diagram of
Figure 5.
5. Connect the USB port to a USB PC port and turn on the 12Vdc supply.
6. Verify D4 LED is green.
7. Verify D6 LED is blinking Orange.

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8. Using a Ethernet IP address sniffer, find the IP address for the TI Demo board.
9. Launch DevCom on a device connected to the same Ethernet as the TI Demo board.
10. Configure DevCom to use TCP/IP (HART-IP).
11. Enter the IP address from Step 7.
12. Poll the network.
13. You should see the TI Demo board with the HART transmitter listed as a sub device.
14. Click the HART transmitter.
15. You can now view the HART device using the APL connection. You can edit
parameters, run methods, etc. just like if you were connected to the HART device with a
HART modem. Except now you are using APL and HART-IP.
Step by Step Connection Procedure Using APL-SW-3
1. Power up the HART transmitter and verify loop current is less than 9mA.
2. Remove connections from Step 1 and connect the Loop + to the HART + terminal on
the PCB. Also connect Loop - to the HART - terminal on the PCB.
3. Connect the APL terminals to the APL terminals on the APL-SW-3. There are 3
different channels.
4. Connect a 24Vdc power supply to the APL-SW-3
6. Verify D4 LED is green on the PCB.
7. Verify D6 LED is blinking Orange on the PCB.
8. The APL-SW-3 has default setting of a DHCP server enabled. It will appear on the
network as 192.168.2.1. This setting can be changed using the Web UI discussed later in
this manual. If you connect the APL-SW-3 directly to your PC’s Ethernet port, it should
get an IP assigned at 192.168.2.26. As APL devices are added, they appear as
192.168.2.27 (Channel 1), 192.168.2.28 (Channel 2), and 192.168.2.29 (Channel 3).
9. Launch DevCom or some other HART-IP enabled host on a device connected to the
same Ethernet network as the APL Switch.
10. Configure DevCom to use TCP/IP (HART-IP).
11. Enter the IP address of the APL channel you wish to communicate on.
12. Poll the network.
13. You should see the APL switch with the APL transmitter listed as a sub device.
14. Tap the APL device.
15. You can now view the APL device using the APL connection. You can edit
parameters, run methods, etc.

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Warranty
The HM-APL-PCB is warranted for 1 year for materials and workmanship. Contact
Support at ProComSol, Ltd if having any problems. An RMA (Return Material
Authorization) number obtained from ProComSol, Ltd is required on all returned items.
Contact Information
ProComSol, Ltd
Process Communications Solutions
13001 Athens Ave
Suite 220
Lakewood, OH 44107
USA
Phone: [phone]
Email: [email protected]
[email protected]
Web: www.procomsol.com