Omega Vehicle Security PX791, PX792 Series manual Read Before Installation, Electrical Connections

PX791 & PX792 SANITARY TRANSDUCERS –

ELECTRICAL CONNECTIONS

Voltage Output Units 1-5, 1-6 Vdc
CABLE TYPE F2
Red	=	+ Power
White	=	Common
Green	=	Output
CABLE TYPE C1
Red	=	+ Power
White	=	Common
Green	=	Output
HIRSCHMANN TYPE
PIN-1	=	+ Power
PIN-2	=	Common
PIN-4	=	Output
BENDIX 4-PIN, 6-PIN
Pin A	=	+ Power
Pin B	=	Output
Pin D	=	Common

Current Output Units 4-20mA
CABLE TYPE F2
Red	=	+ Power
Black	=	Power
CABLE TYPE C1
Red	=	+ Power
Black	=	Power
HIRSCHMANN TYPE
Pin-1	=	+ Power
Pin-2 = Power
BENDIX 4-PIN, 6-PIN
Pin A	=	+ Power
Pin B	=	Power
Ratiometric (mV/V)
CABLE TYPE F2
Red	=	+ Power
White	=	– Power
Green	=	+ Output
Black	=	– Output
CABLE TYPE C1
Red	=	+ Power
White	=	– Power
Green	=	+ Output
Black	=	– Output
HIRSCHMANN TYPE
Pin A	=	+ Power
Pin B	=	+ Output
Pin C	=	– Output
Pin D	=	– Power
BENDIX 4-PIN, 6-PIN
Pin A	=	+ Power
Pin B	=	– Power
Pin C	=	+ Output
Pin D	=	– Output
Pin E	=	Shunt Cal.
Pin F	=	Shunt Cal.

WARNING:

READ BEFORE INSTALLATION

The diaphragm is very sensitive and fragile! Do not let anything touch the diaphragm but the fluid to be measured. Fluid hammer and surges can destroy any pressure transducer and must always be avoided. A pressure snubber should be installed to eliminate the damaging hammer effects. Fluid hammer occurs when a liquid flow is suddenly stopped, as with quick-closing solenoid valves. Surges occur when flow is suddenly begun, as when a pump is turned on at full power or a valve is quickly opened.

Liquid surges are particularly damaging to pressure transducers if the pipe is originally empty. To avoid damaging surges, fluid lines should remain full (if possible), pumps should be brought up to power slowly, and valves opened slowly. To avoid damage from both fluid hammer and surges, a surge chamber should be installed.

Symptoms of fluid hammer and surge's damaging effects:

a)Pressure transducer exhibits an output at zero pressure (large zero offset). If zero offset is less than 10% FS, user can usually re-zero transducer, install proper snubber and continue monitoring pressures.

b)Pressure transducer output remains constant regardless of pressure.

c)In severe cases, there will be no output.