Hach CAx440EX User Instructions page 10

Figure 3 Product components
1 CAx440EX field transmitter
Section 3 Installation
Explosion hazard. Trained personnel only must install or commission the equipment.
3.1 Connect the sensor cables
Explosion hazard. Do not connect wires when an explosive atmosphere is present.
1. Connect the Power/4–20 mA sensor cable (3-wires) to the "4–20mA SENSOR CABLE" terminal.
Refer to Table 5 and
2. Connect the RS-232 sensor cable (4-wires) to the "RS-232 SENSOR CABLE" terminal. Refer to
Table 6 and Electrical wiring overview
Table 5 "4–20mA SENSOR CABLE" terminal—Wiring information
Terminal color
Brown
Blue
White
Table 6 "RS-232 SENSOR CABLE" terminal—Wiring information
Terminal color
Brown
Blue
Black
White
10 English
D A N G E R
D A N G E R
Electrical wiring overview
on page 11.
Wire color
Brown
Blue
Silver
Wire color
Brown
Blue
Black
Silver
on page 11.
Signal
Positive
Negative
Shield
Signal
Sensor RXD (receive)
Sensor TXD (transmit)
GND (ground)
Shield