Electrical Interconnections; Conduit Seal And Pressure Relief; Figure 2-10. Interconnection Wiring Blocks - ABB MINI-MAG 10D1475 Series Instruction Manual

10D1475 MINI-MAG MAGNETIC FLOWMETER INSTRUCTION MANUAL

2.5 Electrical Interconnections

The Series 10D1475 Magnetic Flowmeter may be furnished with either an integrally or remotely
mounted signal converter. Interconnection wiring is arranged differently for the two systems and is
done in the customer connection boxes shown below for the 10D1475J integral & 10D1475Sinte-
gral/remote meters. Refer to interconnection diagrams provided in the instruction manual supplied
with the appropriate signal converter for wiring details.
10D1475J REMOTE METER
10D1475S INTEGRAL/REMOTE METER

FIGURE 2-10. INTERCONNECTION WIRING BLOCKS

WARNING
ELECTRICAL SHOCK HAZARD. Equipment powered by AC line
voltage presents a potential electric shock hazard to the user.
Make certain that the system power input leads are disconnected
from the operating branch circuit before attempting electrical
interconnections.
Regardless of the interconnection procedure required, the grounding procedures given in Section 2.4
must be followed.

2.6 Conduit Seal and Pressure Relief

In accordance with the National Electrical Code (NEC) ANSI/NFPA 70, Article 501-5(f)(3), the
flowmeters include a conduit entry seal and pressure relief to prevent the process liquid from
entering the electrical conduit system. These safety features consider the remote possibility of a
primary seal failure between the meter and the electronic housing.
The conduit entry seal is required in order to prevent the process liquid from entering the electrical
conduit system. This seal consists of a conduit entry cable seal on the meter junction box. The user
must properly install the conduit entry cable seal fitting supplied with the signal converter intercon-
nection cable. This will ensure proper performance of this safety feature. Refer to Figure 2-10.
Failure to install the conduit entry cable seal fitting may void the meter warranty.
A pressure relief is provided in the electronics housing of the flowmeter. The pressure relief is
located in the center of the cover joint on the side opposite from the conduit connection. If the primary
seal should fail, the pressure relief will vent the process preventing an over pressurization and
potentially dangerous failure of the electronics housing. It is the user's responsibility to be aware of
this safety feature and to consider the unlikely event of its functioning. Based on knowledge of the
process and meter application, the user should consider the use of deflectors to safely direct the
vented process.
2-14 INSTALLATION