GE HE500TIU100, IC300TIU201, IC300TIU101, HE500TIU050, HE500TIU113, HE500TIU202 E term in atio n H m

PAGE 42	06 Apr 2000	CH. 8: NETWORKS
GFK-1819

R x D

R x D

R x D

R x D

R x D

R x D

/T xD -N

D G N D

V +

/ T x D -P

D G N D /T xD -N

V +

/ T x D -P

/T xD -N

D G N D

V +

/ T x D -P

8

5

6

3

5 8

6

3

8

5

6

3

Figure 8.5 – Profibus Network Cabling

Its is necessary to terminate both ends of the network. Both terminations must have power to them to insure proper operation of the network. The following diagram illustrates the correct connection for the termination resistors.

V P (6 )

L in e term in atio n

3 90 O h m

A -L in e (3 )

2 20 O h m

B -L in e (8 )

3 90 O h m

G N D (5 )

Figure 8.6 – Profibus termination resistors