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HART MODEM

User s manual

'

UNICOMM SAT-504

HART/USB BLUETOOTH MODEM

Thank you for choosing a NIVELCO instrument. 

We are sure that you will be satisfied throughout its use! 

1. APPLICATION 

The 

UNICOMM SAT-504

 modem establishes communication between HART

®

-capable field devices and a 

process controller computer. The UNICOMM HART

®

 modems are applicable for all HART

®

-capable 

transmitters that use standard HART

®

 communication.  

Depending on the design the following versions can be ordered: 

 

HART

®

/USB modem, normal type; 

 

HART

®

/USB modem with power supply for transmitter and switchable HART

®

 terminal resistor; 

 

HART

®

/USB modem with power supply for transmitter, switchable HART

®

 terminal resistor and

 

Bluetooth

®

 interface. 

The modem ensures galvanic isolation for the transmitter from the process controller system and it is 
powered by a USB interface or a USB power bank. 

2. TECHNICAL DATA 
2.1

 

G

ENERAL DATA

 

 

Power Supply 

USB interface or  
USB power bank 

HART current loop power supply  24 V DC ±5% max. 22 mA 
HART terminal resistor 

250 

 switchable 

Bluetooth version 

2.1 

Bluetooth name, Pairing code 

SAT504-BT, 1234 

Current consumption from USB 

<150 mA 

Power consumption from USB 

<1 W 

Ambient temperature 

-25 

C … +55 

(+77 

F … +131 

F) 

Housing material 

Polystyrene 

Connection to PC 

USB 1.1 “B” socket 

Cable to PC 

USB “A-B” 1.8 m (5.9 feet) 

Connection to HART line 

KLEPS2 spiral 1.1 m (3.4 feet) 

Ingress protection 

IP20 

Electrical protection 

Class III 1 kV galvanic isolation 

Mass 0.1 

kg 

 

2.1

 

A

CCESSORIES

 

 

User’s Manual 

 

Warranty Card 

 

Declaration of Conformity 

 

USB “A-B” cable 1.8 m (5.9 feet) 
 

2.2

 

O

RDER CODE

 

UNICOMM SAT-504-   

 

 

 

 

HART

®

 normal type 

HART

®

 + transmitter power 

supply 

HART

®

 + transmitter power 

Bluetooth

®

 

2.4

 

D

IMENSIONS 

(

IN MM

40

Ø

9,

5

39

22

79

 

3. COMMUNICATION OPTIONS 

The modem meets the HART

®

 communication standards and applicable for all 

HART

®

-capable transmitters that use standard HART

®

 communication. 

 

To enable communication through the USB 1.1. or USB 2.0. port of the PC a 
driver program (FT 232 RL) is needed. This driver can be downloaded from the 
CD-ROM containing the 

EView2

 program package provided to all 

NIVELCO

 

transmitters purchased with HART

®

 option. The program can also be downloaded 

from the http://ftdichip.com website. 

4. WIRING, OPERATION 

The modem should be connected to a HART

®

 field device by 2 pieces of KLEPS2

 

measuring clamps. The 

SAT-504

 does not have surge protection, thus use of an 

adequate lightning protection that does not affect standard HART

®

 signal 

transmission is advised. 

USB / 5 V

POWER BANK

UNICOMM SAT-504-2

 

4.1

 

HART

®

/USB

 INTERFACE FUNCTION 

(

FOR ALL TYPES

:

 

SAT-504-0,

 

1,

 

2) 

The clips should be positioned in accordance with polarity. When the USB cable 
and the clips are connectected to the PC, the modem turns on, and switches to 
the basic state marked with an asterisk (*). The following states are displayed 
during operation: 

Stby/ON

Tx/Rx

HART IF.

ON

Tx/Rx

(+)

 Red

(–)

 Black

Current

loop

U

SB

-HA

RT

 M

O

D

EM

 

 

Interface 

LED 

Name 

State 

USB 

 

not lit 

turned off (inactive mode) 

Stby/ON 

yellow 

turned on (standby mode) 

 

* green 

turned on (active mode) 

TX/RX 

red PC 

send 

green PC 

receive 

* not lit 

no data transfer 

HART

®

 

ON 

not lit 

turned off (inactive mode) 

* green 

turned on (active mode) 

TX/RX 

red 

transmission to HART

®

 

green 

reception from HART

®

 

* not lit 

no data transfer 

 

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