C-4 Field Control Genius® Bus Interface Unit User’s Manual October 1999 GFK-0825F

C
Selecting a Cable Type

The Genius bus is a shielded twisted-pair wire, daisy-chained from block to block and terminated at both ends.

Proper cable selection i s critical to successful oper ation of the system.

Each bus in the system can be an y cable type listed in the table bel o w. D o n ot mix cables of different imp ed an ce,

regardless of cable run length. Do not mix cable types in long and/or noisy installations. Other, small-size twisted

pair shielded wire of unspecified impedance can be used for short runs of 50 feet or less, using 75 ohm terminations.

Selection of wire type may be limited by local and national codes and industry standards. Consult the cable

manufacturer to determine the cable's suitability for a particular type of installation.

Conservative wiring practices and national and local codes require physical separation between control circuits and

power distribution or motor power. Refer to sections 430 and 725 of the National Electric Code.

Cable #

& Make NEC

(USA)

Type

Outer

Diameter

Terminating

Resistor*

-10%to+20%

1/2 Watt

Number of

Conductors/

AWG

Dielectric

Voltage

Rating

Ambient

Temp

Rating,

Deg. C

Maximum Length Cable Run,

feet/meters at baud rate

153.6s 153. 6e 76.8 38.4

(A)9823
(C)4596
(M)M39240
none
CL2
CM
.350in
8.89mm 150 ohms 2 / #22 30V 60 2000ft
606m 3500ft
1061m 4500ft
1364m 7500ft
2283m
(B)89182 CL2P .322in
8.18mm 150 ohms 2 / #22 150V 200 2000ft
606m 3500ft
1061m 4500ft
1364m 7500ft
2283m
(B)9841
(M)M3993 CM
CL2 .270in
6.86mm 120 ohms 2 / #24 30V 80 1000ft
303m 1500ft
455m 2500ft
758m 3500ft
1061m
(A)9818C
(B)9207
(M)M4270
CL2
CM
CM
.330in
8.38mm 100 ohms 2 / #20 300V 80 1500ft
455m 2500ft
758m 3500ft
1061m 6000ft
1818m
(A)9109
(B)89207
(C)4798
(M)M44270
CL2P
CM
*
CMP
.282in
7.16mm 100 ohms 2 / #20 150V 200 1500ft
455m 2500ft
758m 3500ft
1061m 6000ft
1818m
(A)9818D
(B)9815 none
*.330in
8.38mm 100 ohms 2 / #20 1500ft
455m 2500ft
758m 3500ft
1061m 6000ft
1818m
(O)911264
** none .260in
6.60 mm 100 ohms 2 / #22 flexing 250V 80 1500ft
455m 2000ft
606m 3000ft9
09m 4500ft
1364m
(E)532185
BBDN CM approx .50in
(12.7mm) 100 ohms 4 pairs #24
(solid) >150V 80 1500ft
455m 2000ft
606m 3000ft
909m 4500ft
1364m
(A)9818
(B)9855
(M)M4230
*
CM
CM
.315in
8.00mm 100 ohms 4 (two pair) #22 150V 60 1200ft
364m 1700ft
516m 3000ft
909m 4500ft
1364m
(A)9110
(B)89696
(B)89855
none
CMP
CMP
.274in
6.96mm 100 ohms 4 (two pair) #22 150V 200 1200ft
364m 1700ft
516m 3000ft
909m 4500ft
1364m
(A)9814C)
(B)9463
(M)M4154
none
CM
CL2
.243in
6.17mm 75 ohms 2 / #20 150V 60 800ft
242m 1500ft
455m 2500ft
758m 3500ft
1061m
(A)5902C
(B)9302
(M)M17002
none
CM
CM
.244in
6.20mm 75 ohms 4 (two pair) #22 300V 80 200ft
60m 500ft
152m 1200ft
333m 2500ft
758m

Notes: A = Alpha, B = Belden, C = Consolidated, E = Essex, M = Manhattan, O = Olflex

= Limited to 16 taps at 38.4 Kbaud

* = not known

**= Suitable for applications requiring high flexibility, continuous flex or vibrati on.

NEC classes are based on data obtained from manufacturers and are subject to chan g e. CANADI AN CEC codes are

generally similar. Other countries may vary. The serial bus can be treated as a Class 2 circuit when appropriate

wiring practices are followed. Maximum available bus lengths may be affected when installation requires the high

voltage rated CM (Communications) rating. CM types can replace CL2, but not vice versa.