Ronan X55-600 Series Manuale Utente Scaricare il pdf (Pagina 3)

input signal, i.e., when the input signal

increases toward full scale, the output pres-

sure decreases toward the zero value.The

SPLIT/FULL switch, when in the SPLIT posi-

tion, causes a full scale change in the output

pressure for a 50% change of the normal

input span, e.g., a 3-15 psig output change in

response to a 4-12 or 12-20 mA input

change.

2.0 SPECIFICATIONS

Air Consumption: 0.002 SCFM.

Supply Pressure Effect: None.

Supply Pressure: 5-120 psi (min. = output

+5 psi.)

Loop Voltage Drop: <6 VDC (at 4-20 mA

input).

Output Ranges: 3-15, 3-27, 6-30, 0-60, 0-

100 psi. For other zero based and high out-

put pressure ranges contact Ronan.

Accuracy: ±0.20% of span includes linearity,

hysteresis, and repeatability.

Zero and Full Scale Adjustability: >±12%

of span.

Input Range: 4-20, 10-50 (switch selec-

table), 0-10 Vdc available - contact Ronan.

Operating Modes: Direct, reverse, or split

range (switch selectable)

Mounting Position Effect: None.

Vibration Effects: <±1.0% of span at ±1.0

g’s from 5-2 KHz.

RFI/EMI Effects: <0.8% of range with 5 Watt

transmitter at 1 meter (20 to 500 MHz).

Shock Effects: ±3% of span at 30 g’s.

Operating Temp.: -20 to +150°F (-11 to 65°C).

1.0 GENERAL DESCRIPTION

The Ronan Model X55-600 I to P Transducer

accepts a 4-20 or 10-50 mA control signal

input and provides a regulated pressure out-

put. The input current range is selectable by

a switch located on the top of the module.

The input pressure may be in the range of 20

to 120 psig and at least 5 psig above the

maximum output pressure. The Model X55-

600 utilizes solid-state technology and output

pressure sensing to provide a high degree of

accuracy. A closed loop feedback system is

utilized to condition the mA input current into

a voltage which is applied to one input of a

control comparator. The comparator output

causes the control voltage on a piezo-ceram-

ic beam to bend the beam in a manner that

results in, more or less, back pressure on a

balanced diaphragm and spring valve control

assembly. As the output pressure responds

to a change in the input signal, it is sensed

by a pressure sensor whose electrical output

is conditioned and applied to the second

input of the control comparator. When this

pressure feedback signal is equal to the con-

ditioned input signal, the output pressure has

changed to the desired value and the system

remains in this state until the input mA signal

is changed to a new value.

The piezo-ceramic beam is a very delicate

device designed for extremely small move-

ments in proportion to the signal applied.

Attempting to deflect the beam manually will

result in a damaged or broken beam, which

is not covered under warranty.

Other switch-operated controls located at the

top of the module are a DIR/REV (direct/

reverse) switch and a SPLIT/FULL switch.

The DIR/REV switch, in the REV position,

inverts the output signal with respect to the

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