4.5Wiring SMV 3000 Transmitter

CE Conformity Special Conditions (Europe)

Summary

You must use shielded, twisted-pair cable such as Belden 9318 for all signal/power wiring.

The transmitter is designed to operate in a two-wire power/current loop with loop resistance and power supply voltage within the operating range shown in Figure 13.

Figure 13 Operating Range for SMV 3000 Transmitters

 

1440

 

 

 

 

 

 

 

1200

 

 

 

 

 

 

Loop

800

 

 

 

 

 

 

Resistance

 

 

 

 

 

 

 

 

 

 

 

 

 

(ohms)

650

 

 

 

 

 

 

 

 

 

 

 

 

 

 

450

 

 

 

 

 

 

 

250

 

 

 

 

 

 

 

0

10.8

16.28

20.63 25

28.3

37.0

42.4

=Operating Area

NOTE: A minimum of 250 0hms of loop resistance is necessary to support communications. Loop resistance equals barrier resistance plus wire resistance plus receiver resistance. Also 45 volt operation is permitted if not an intrinsically safe installation.

Operating Voltage (Vdc)

21012

 

 

You simply connect the positive (+) and negative (–) loop wires to the positive (+) and negative (–) SIGNAL terminals on the terminal block in the transmitter’s electronics housing shown in Figure 14.

Continued on next page

30

SMV 3000 Transmitter User’s Manual

1/99

Page 42
Image 42
Honeywell user manual Wiring SMV 3000 Transmitter, CE Conformity Special Conditions Europe Summary