Belimo LRX - Page 2

2
INSTRUCTION MANUAL
LRX, NRX, ARX Modbus Actuators
with Electronic Pressure Independent Valves (ePIV)
24 VAC/DC Transformer
Line
Volts
Blk (1)
Common
Red (2) + Hot
Wht (3)
Org (5)
Pnk (6)
Gry (7)
MFT
D-
D+
Modbus (RS-485)
24 VAC/DC Transformer
Line
Volts
Blk (1)
Common
Red (2) + Hot
Wht (3)
Org (5)
Pnk (6)
Gry (7)
MFT
D-
D+
Modbus (RS-485)
Δp
Modbus control for Non-Spring Return Modbus control with switching contact for Non-Spring Return
Note:
Modbus signal assignment:
C
1
= D- = A
C
2
= D+ = B
Power supply and communication are not
galvanically isolated.
Interconnect ground signal of the devices.
Requirements for switching contact:
The switching contact must be able to accurately switch a current of
16 mA at 24 V.
24 VAC/DC Transformer
Line
Volts
Blk (1)
Common
Red (2) + Hot
Wht (3)
Org (5)
Pnk (6)
Gry (7)
MFT
D-
D+
Modbus (RS-485)
24 VAC Transformer
Line
Volts
Blk (1)
Common
Red (2) + Hot
Wht (3)
Org (5)
Pnk (6)
Gry (7)
MFT
D-
D+
Modbus (RS-485)
OPEN

max
CLOSED Bus mode
Modbus control with active sensor for Non-Spring Return Modbus control with local override (AC only, analogue override)
for Non-Spring Return
Possible input voltage range:
0...32 V (resolution 30 mV)
Note:
If no sensor is integrated, then connection 3 (Y) is available for the protective
circuit of a local override control. Options: CLOSED, Vmax, OPEN
BLK
Black
Negro
Noir
Preto
RED
Red
Rojo
Rouge
Vermelho
WHT
White
Blanco
Blanc
Branco
ORG
Orange
Anaranjado
Orange
Alaranjado
PNK
Pink
Rosado
Rosa
Cor-de ros
GRY
Gray
Gris
Gris
Cinza
WIRING DIAGRAM
ModBus Actuators - LRX, NRX, ARX
71613-00001.C
Subject to change. © Belimo Aircontrols (USA), Inc.