ABB Bailey IEPEP01 Pressure Transmitter

Physical Dimensions and Mechanical Construction

The ABB Bailey IEPEP01 converts process pressure into a standard 4-20 mA signal. This transmitter measures 120mm in length and 45mm in diameter. You can mount this unit directly to a 1/2-inch NPT process connection without additional adapters. The device weighs 0.38 kilograms , making it suitable for direct pipe installation.

Internal Components and Sensor Technology

The ABB Bailey IEPEP01 contains 42 individual components on its sealed internal PCB. A piezoresistive silicon sensor provides the primary pressure-to-voltage conversion. Two instrumentation amplifiers boost the sensor signal to usable levels. Additionally, four Zener diodes protect the circuit from overvoltage and reverse polarity.

Energy Storage and Signal Conditioning

This pressure transmitter stores 1.8 joules across two tantalum capacitors. This energy reserve powers the zero and span adjustment circuit during calibration. The storage also maintains output stability through brief power supply fluctuations. Consequently, the transmitter delivers consistent readings in electrically noisy environments.

Parameter	Value	Unit
Dimensions (length)	120	mm
Dimensions (diameter)	45	mm
Weight	0.38	kg
Process connection	1/2″ NPT male	–
Total components	42	pieces
Sensor type	Piezoresistive silicon	–
Instrumentation amplifiers	2	units
Protection Zener diodes	4	units
Tantalum capacitors	2	units
Total energy storage	1.8	J
Pressure range	0 to 10	bar
Overpressure limit	20	bar
Output signal	4 to 20	mA
Supply voltage	12 to 36	V DC
Accuracy (typical)	±0.25	% span
Long-term drift	±0.1	% / year
Response time	50	ms
Wetted materials	316L stainless steel	–

Electrical Interface and Wiring

The ABB Bailey IEPEP01 uses two wires for both power and signal transmission. A screw-type terminal block accepts AWG 24 to AWG 18 shielded instrument cable. The transmitter connects directly to any 4-20 mA input card without external power supply. The loop voltage must remain between 12V and 36V DC for proper operation.

Calibration and Configuration Features

This device includes zero and span potentiometers accessible under a protective cover. You can adjust the zero point across ±15% of the calibrated range. The span adjustment allows you to scale the output from 25% to 100% of sensor range. Furthermore, the transmitter retains calibration settings indefinitely without battery backup.

Environmental Protection and Housing

The ABB Bailey IEPEP01 features a NEMA 4X (IP66) enclosure for harsh environments. A polyurethane paint finish resists corrosion from chemicals and moisture. The housing includes a glass-filled polyester cover with an O-ring seal. You can install this transmitter outdoors or in washdown areas without additional protection.

Process Compatibility and Materials

All wetted parts use 316L stainless steel for broad chemical compatibility. The diaphragm measures 0.1mm thickness for fast pressure response. This transmitter handles process temperatures from -20°C to 85°C continuously. You can use the unit with air, water, oils, and mild acids without material degradation.

Applications and Installation Notes

You can install this transmitter on pipes, tanks, or pumps for pressure monitoring. The unit requires no impulse tubing for direct mounting to process ports. Please apply thread sealant to the NPT connection for leak-free installation. The transmitter orientation does not affect calibration due to its lightweight sensor design.