Honeywell Enraf VITO 764 User Manual

Electrical installation
Installation guide 762 VITO interfaces & VITO probes Page 18
3.2 VITO Interface wiring to tank level gauge
The VITO-MTT/LT/MRT Interface connection to associated Honeywell Enraf instrument is
by a single twisted pair cable. The single pair provides both intrinsically safe supply to the
interface as well as data communication between the interface and the associated gauge.
The VITO-CEPS Interface (used with the 365 MPT temperature and water probe) requires
a double twisted pair cable.
The cable to the gauge is fed through the side threaded opening of the VITO Interface.
Note:
Local and company requirements must be followed for routing of intrinsically safe
wiring.
Power rating:
 VITO-MTT & VITO-LT Interface : 15 Vdc nominal; 5.5 mA
 VITO-MRT Interface : 15 Vdc nominal; 7.0 mA
Refer to the level gauge manual for details on the wiring in the level gauge.
3.2.1 Cable requirements
Keep cable length between 762 VITO Interface and associated instrument as short as
possible.
The connection to the instrument must be made with shielded cable.
Cable requirements are:
 Single twisted pair and shielded (with 361 VITO MPT probe, 76x VITO probes
and MRT)
 Double twisted pair and shielded (with 365 VITO MPT / water probe)
 RB
max
B : 25  / line
 CB
max
B : 1 μF
 LB
max
B : 15 mH
Caution
Wiring to 762 VITO Interface shall be protected against EMC influences.
Note:
It is required to use metallic cable glands to provide good contact between cable shield
and VITO Interface enclosure.
The shield of the cable shall be connected inside the cable gland.
Note:
Shielding must be connected externally to the VITO Interface enclosure and
Associated instrument, or in the cable glands; thus never inside the VITO Interface
enclosure.

Honeywell Enraf VITO 764 Specifications

General

Brand	Honeywell
Model	Enraf VITO 764
Category	Test Equipment
Language	English