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4.2

 

24V

 CURRENT LOOP POWER SUPPLY

,

 ADDITIONAL FUNCTION 

 

(

ONLY AT 

SAT-504-1,

 

2

 TYPE

Stby/ON

Tx/Rx

Select

HART IF.

ON

Tx/Rx

250

24V

+

(+)

 Red

(–)

 Black

Current

loop

U

SB

-HA

RT

 M

O

D

EM

 

 

After turning on, the modem starts working in basic mode (marked with an 
asterisk (*)). Then, in addition to the states described in 4.1, the following modes 
can be set by pressing the “Select” button for a short time (<1 sec). 

Number of short  

(<1 sec) button press 

LED 

Name 

State 

1

st

 

250 

 

yellow 

HART

®

 resistor ON 

24 V 

not lit 

Power supply OFF 

2

nd

 

250 

 

yellow 

HART resistor ON 

24 V 

yellow 

Power supply ON 

3

rd

 

250 

 

* not lit 

HART

®

 resistor OFF 

24 V 

* not lit 

Power supply OFF 

4

th

 

Same as in 1

st

 row above 

Turning on/off the modem by pressing the “Select” button for a long time (>5 sec). 

Number of long  

(>5 sec) button press 

LED 

Name 

State 

1

st

 

Every LED 

not lit 

Modem OFF 

2

nd

 

LEDs according 

type 

Basic state 

according 

type 

Modem ON 

3

rd

 

Same as in 1

st

 row above 

 

4.3

 

B

LUETOOTH

®

 CONNECTION

,

 ADDITIONAL FUNCTION 

 

(

ONLY AT 

SAT-504-2

 TYPE

Stby/ON

Tx/Rx

Select

HART IF.

ON

Tx/Rx

250

24V

+

(+)

 Red

(– )

 Black

Current

loop

US

B-

HA

RT

 M

O

DE

M

ON

 

4.3.1

 

P

OWER SUPPLY FROM 

USB

 POWER BANK

 

The clips should be positioned in accordance with polarity. Connecting the USB 
cable to an external 5V power bank, results entering to the basic state marked 
with *. The following indications can be displayed during operation. 

Interface 

LED 

Name 

State 

Bluetooth

®

 

 

ON 

* flashing blue 

Waiting to 

Bluetooth

®

 

connect 

blue 

Bluetooth

®

 

connection 

established 

4.3.2

 

P

OWER SUPPLY FROM MOBILE DEVICE 

USB

 

OTG

 PORT

 

The following modes can be set by a medium (2 – 5 sec) press of the “Select” 
button. 

Number of medium 

(2 – 5 sec)  

button press 

LED 

Name 

State 

1

st

 

 

ON 

* not lit 

turned off  

(inactive mode) 

USB Stby/ON  * green 

turned on  

(active mode) 

2

nd

 

 

ON 

flashin

g blue  

Waiting for  

Bluetooth

®

 connect 

USB Stby/ON 

not lit 

turned off  

(inactive mode) 

3

rd

 

Same as in 1

st

 row above 

 

5. MAINTENANCE AND REPAIR 

The unit does not require regular maintenance. All repairs will be carried out on 
the manufacturer’s premises. 
 

6. STORAGE CONDITIONS 

Ambient temperature: -25 °C … +55 °C (+77 °F … +131 °F) 
Relative humidity: maximum 98%. 

 

7. WARRANTY 

NIVELCO provides warranty of 3 (three) years in compliance with details 
described in the Warranty Card.

 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

 
 
 
 
 
 
 

 

 

sat5040a0600h_01 

December, 2017 

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