Honeywell Enraf 854 ATG, Руководство по установке, Страница: 14 / 24

Electrical installation
Page 14 Installation guide 854 ATG
Non-intrinsically safe cabling
Mains cabling
: Must be suitable for the 854 ATG power rating and, moreover, approved for
the use in hazardous areas.
Honeywell
Enraf field bus
: One twisted pair cable is recommended. R
max
= 200 Ω / line; C
max
= 1 µ F.
Maximum length: 10 km.
Honeywell Enraf field bus lines may be interchanged. If local regulations
allow, mains and Honeywell Enraf field bus lines may share one cable. Mind
the isolation voltage of the cores in the cable; refer to the International
Standard IEC 61010-1.
Note:
If a quad cable is used and all four cores are twisted together, use two
opposite cores for Honeywell Enraf field bus lines and the two others for
mains.
Relay output
: Option. The relay output contacts are potential free.
Contact rating: U
max
= 50 Vac or 75 Vdc; I
max
= 3 A non-inductive
(CSA only: 0.6 A). Mind the isolation voltage of the cores in the cable; refer
to the International Standard IEC 61010-1.
Analog output
: Option. Use shielded cable. External supply voltage: 12 to 64 Vdc.
See figure 9.
Figure 8 Non-Intrinsically safe connections