Lars Thrane Iridium Certus 200, Руководство пользователя и инструкция по установке

Страница: 44 / 141

LT-4200 User & Installation Manual Rev. 1.00 DC Isolation Resistance and Chassis Ground
Lars Thrane A/S www.thrane.eu Page 33 of 128
DC Isolation Resistance and Chassis Ground
The LT-4200 system must be installed properly with respect to DC isolation resistance and chassis ground.
Wrong installations can lead to DC isolation issues (low Ohm meter measuring) on board the vessel and
equipment damages. This section will provide details about installation precautions, which must be
followed.
LT-4210 Control Unit (back view) with an upscaled power connector are illustrated in Figure 29. The Chassis
ground (GNDC) must be connected sufficiently to the vessel ground. 91-102218 Power Cable, 3m must be
used to connect the LT-4210 Control Unit to the vessel 24 VDC power source. DC isolation resistance
measured on a disconnected LT-4210 Control Unit between GNDC and VDC (-) > 50 M
Ω .
The LT-4230 Antenna Unit (bottom view) is illustrated in Figure 30. Chassis ground (GNDC) on the LT-4230
Antenna Unit is defined as the mechanics (connected to the mounts).
Figure 29: LT-4210 Control Unit (VDC(+), VDC(-), and GNDC)
Figure 30: LT-4230 Antenna Unit (VDC(+), VDC(-), and GNDC)