OUTPUT OPTION CARD
If the Series 3050 BTU flow monitor was ordered with the Output Option card, it will have these additional outputs:
• Analog Output
( 0…20 mA or 4…20 mA ) that can be converted externally to 0…5V DC, 1…5V DC with a 250 Ω resistor;
or 0…10V DC or 2…10V DC with a 500 Ω resistor . A 15V DC power supply is provided to permit current sinking or sourcing .
The Series 3050 BTU flow monitor has special software that permits the Analog output .
• USB
for direct access to a computer using a standard mini-USB cable .
• RS-485
for fully addressable Modbus or BACnet communication .
Analog Output
+
1 RS485 B
2 RS485 A
3 RS485 GND
4 LOOP +
5 LOOP -
6 GND
-
Figure 13: Current sourcing analog output
1 RS485 B
2 RS485 A
3 RS485 GND
4 LOOP +
5 LOOP -
6 GND
Figure 14: Current sinking analog output
RS-485 Output
Model 3700
Model 345WT
or other
MODBUS
Master
Device
Shield
RS485 -
RS485 +
1 RS485 B
2 RS485 A
3 RS485 GND
4 LOOP +
5 LOOP -
6 GND
Figure 15: RS-485 output wiring
Installation
Page 14
June 2018
DSY-UM-01668-EN-02
