DS8500-KIT# Fast Delivery |IC PHOENIX CO.,LIMITED

DS8500-KIT# ,Evaluation Kit for the DS8500FeaturesThe DS8500 evaluation kit (EV kit) provides a conve- ● The EV Kit Provides Fast and Simple ..
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DS8500-KIT#
Evaluation Kit for the DS8500
Evaluates: DS8500DS8500 Evaluation Kit
General Description
The DS8500 evaluation kit (EV kit) provides a conve-
nient platform to evaluate the DS8500 HART® modem.
It allows quick evaluation through a demonstration mode
and in-depth evaluation using HART Communication
Foundation (a part of FieldComm Group) tools.
EV Kit Contents●DS8500 EV Kit Board●Micro-USB Cable
Beneits and Features●The EV Kit Provides Fast and Simple Evaluation by
Providing a Total HART Communications Chain on
Board●Example HART Master and Field Device Circuits
Demonstrate Usage in the Two Most Common HART
Connection Configurations●HART Registered Modem IC●On-Board Isolated 4mA–20mA Communications Loop●MAXQ622 USB Microcontroller with Demo Firmware●External Connections Allow for Advanced Evaluation
of the DS8500 in Other Configurations
HART and HART Registered are registered trademarks of the
HART Communication Foundation Corp.
Figure 1. USB Connection and READY LEDs
Evaluates: DS8500DS8500 Evaluation Kit
Quick Start
The DS8500 EV kit comes with demonstration firmware
already loaded.
1) Download and install the DS8500 EVKIT Software
GUI at www.maximintegrated.com/evkitsoftware.
2) Use the included Micro-USB cable to connect and
power the EV kit as shown in Figure 1.
3) Wait until the READY LEDs (circled in Figure 1) light after the board has inished USB enumeration. This
can take several seconds.
4) Start the DS8500 EVKIT GUI from the Start menu
by selecting Maxim Integrated | DS8500 | DS8500 Evaluation Kit. Figure 2 shows the demo GUI. It automatically inds the USB-connected EV kit.
5) Simply type messages from the Master or Field Device window and press the Send button to
transmit and receive modulated data over the
on-board 4–20mA current loop.
6) Observe the ACTIVE LEDs lighting while transmitting
and receiving.
Detailed Description of Hardware
Users must also use the DS8500 IC data sheet in con-
junction with this EV kit data sheet.
Power Supply
The EV kit uses USB power for all on-board devices.
On-Board 4–20mA Current Loop
The current loop is isolated from board ground and
power allowing communications between Master and Field Device, both implemented by serial ports on the
MAXQ622. This common connection necessitates use
of a fully isolated 4–20mA loop, which is very sensitive
to ground loops, thus direct probing of the on-board loop
is strongly discouraged and could damage the EV kit.
Note that this is a nontypical configuration specifically
designed for demonstration purposes. In typical installa-
tions, Master and Field Device are separately located,
with the Field Device floating, often powered by loop
current.
Figure 2. DS8500 EV Kit Demo GUI
Evaluates: DS8500DS8500 Evaluation Kit
Interface Ports
Jumpers JP2–JP5 provide direct access to the serial
control signals for the Master side of the HART loop.
Jumpers JP8–JP11 provide direct access to the serial
control signals for the Field Device side of the HART
loop. These allow connection to an embedded microcon-
troller or computer running a HART stack via 3.3V TTL
serial UART. See Table 1 and the Advanced Evaluation
section for more details.
Each DS8500 exposes FSK_OUT and FSK_IN signals
via jumper for probing purposes (Table 2).
Jumper Functions
The DS8500 EV kit is equipped with 17 jumpers for
disconnecting pins and modifying the EV kit features.
Table 3 details the jumpers not previously covered.
External Connectors
The EV kit has three terminal blocks for easy loop/wire
connections. See Table 4.
Advanced Evaluation
The DS8500 EV kit can communicate directly with actual
HART devices or software-emulated devices. The on-
board MAXQ622 is only for demonstration purposes
Table 1. Master and Field Device Control Signals
Table 2. FSK Probe and Disconnect Jumpers
Note: Serial signals are 3.3V TTL.
PORT PINPIN NAMEPIN TYPEDESCRIPTION
JP2HRXD_MOutputDigital serial data output from MASTER DS8500 (DOUT)
JP3HOCD_MOutputCarrier detect output from MASTER DS8500
JP4HTXD_MInputDigital serial data input to MASTER DS8500 (DIN)
JP5HRTS_MInputActive-low request to send signal for MASTER DS8500
JP8HRXD_FOutputDigital serial data output from FIELD DEVICE DS8500 (DOUT)
JP9HOCD_FOutputCarrier detect output from FIELD DEVICE DS8500
JP10HTXD_FInputDigital serial data input to FIELD DEVICE DS8500 (DIN)
JP11HRTS_FInputActive-low request to send signal for FIELD DEVICE DS8500
JUMPERNAMETYPEDESCRIPTION
JP6FSK_IN_MInputMASTER side incoming FSK-modulated serial signal
JP7RAW_FSK_MOutputMASTER side outgoing FSK-modulated serial signal
JP12FSK_IN_FInputFIELD DEVICE side incoming FSK-modulated serial signal
JP13RAW_FSK_FOutputFIELD DEVICE side outgoing FSK-modulated serial signal
Evaluates: DS8500DS8500 Evaluation Kit
(USB interface) and does not implement a HART software
stack. The serial UART data and control pins are exposed
via jumpers as detailed in Table 1. They allow a hardware
serial port on a PC or laptop to transmit and receive
modulated signals. Note that these serial pins expect TTL
level signals (3.3V), not RS-232 level, so a serial level
shifter board is typically required for communications.
The following examples detail two evaluation setups.
Other configurations are possible, including emulating
both simultaneously, or connection to an actual Field
Device. However, these are beyond the scope of this doc-
ument. Note: The following configurations require hard-
ware and software tools available from the FieldComm
Group or other sources and are not included with the
DS8500 EV kit.
Emulated HART Field Device
To use the DS8500 EV kit as a Field Device interface,
follow the setup detailed in Figure 3, using the on-board
24V loop power supply and load resistor. Simply connect
a personal computer running HART master software,
(e.g., HCF_KIT_180) and a HART serial modem (e.g.,
HCF_TOOL-35, available with the Physical Layer Test Kit
HCF_KIT-116). The reference modem’s loop connections
attach across the Field Device as shown. Verify that the
jumpers (J7 and J9) remain in place, even with the loop
connections attached.
Another personal computer simulates the behavior of an
actual field device by running the XMTR MV tool (HCF_
TOOL-039). Remove jumpers JP8–JP11 and connect the
serial signals to the computer via a RS-232 level shifter.
To test, launch the XMTR MV program, then start the
Master software and observe communications.
Table 3. Jumper Settings
Table 4. External Connectors
*Default position.
JUMPERSETTINGEFFECT
JP1 (1-2)Closed*Powers the 4–20mA loop from on-board power
OpenDisconnects 4–20mA loop from on-board power
JP1 (2-3)ClosedConnect external loop power from connector J2
Open*Disconnects external loop power from connector J2
Closed*Connects loop power to master device
OpenIsolates loop power from master deviceClosed* Connect master to ield device via loop
OpenIsolates master from ield device via loopClosed*Connects ield device to master via loop
OpenIsolates ield device from master via loopClosed*Connects ield device to loop return
OpenIsolates ield device from loop return
JP14Closed*Connects VBUS power (5V) to loop 24V power supply
OpenDisconnects power from loop supply for noise reduction
CONNECTORPURPOSEPower the 4–20mA loop from an external galvanic isolated supply or batteryWire connection interface to MASTERWire connection interface to FIELD DEVICE
Evaluates: DS8500DS8500 Evaluation Kit
Figure 3. Setup for Emulated Field Device Evaluation
JP2RXD M
JP3OCD M
JP4TXD M
JP5RTS M
RS232
LEVEL
SHIFTER
RXD FJP8
OCD FJP9
TXD FJP10
RTS FJP11
MASTER
250Ω -24V
FIELD
DEVICE
USB
REFERENCE
MODEM
HCF_TOOL-35
PC/LAPTOP
FIELD DEVICE
XMTR MV
HCF_TOOL-039
PC/LAPTOP
MASTER
HCF_KIT_180
DS8500 EVKIT BOARD

Partno	Mfg	Dc	Qty	Available	Descript
DS8500-KIT# \|DS8500KIT	DALLAS	N/a	3	avai	Evaluation Kit for the DS8500