OverviewThe ST5484E is a self-contained seismic velocity transmitter that incorporates a piezoelectric accelerometer, signal integrator, RMS peak detector, and a 4-20 mA signal conditioner into a single package. It can be mounted directly on a machine case or bearing housing without intervening signal conditioning equipment. The amplitude of the integrated acceleration (velocity) signal is converted to a proportional 4-20 mA signal compatible with industrial process control instrumentation such as PLCs, DCSs, and SCADA systems that can provide trending and/or alarming capabilities for a simplified vibration monitoring strategy. When the flying lead or terminal block connector options are chosen, the transmitter does not need a separate environmental housing and can directly accept conduit. To reduce installed cost, it can be used with barriers for intrinsically safe installations, or wired directly to explosion-proof conduit fittings for explosionproof, or with increased safety installations. Ordering Information Model ST5484E Seismic Velocity 4-20 mA Velocity Transmitter Full Scale Range(1) 121 1.0 in/sec (25.4 mm/s) peak(2) Housing Material & Stud Size(1) 10 316 SS housing, ¼” NPT stud Hazardous Area Certification(3),(4),(5),(6) 7 ATEX/UKEX/IECEx/KOSHA/ECAS/NEPSI Ex ia IIC T4 Ga (intrinsically safe) Connection Type(3) 4 2-Pin MIL-Style (MIL-C-5015); (4-20 mA output only) High-Pass Filter 0 2 Hz (standard) Low-Pass Filter 0 1500 Hz (standard) Smaller-diameter mounting studs are not able to withstand sustained ambient vibration levels above 2.0 in/sec. Consult Table 2 for allowable combinations of A and B options.The ST5484E uses an RMS amplitude detection circuit. Full scale ranges in peak units use scaled RMS (i.e., RMS x v2). The “derived peak” measurements will equal true peak only under the special case of a pure sinusoid, not complex vibration signals.Hazardous Area Certifications are not compatible with all connection types. Consult Table 3 for allowable combinations of C & D options.Some approvals require intrinsic safety barriers, others require Explosion-Proof wiring practices. Refer to Table 4.Refer to the Accessories section of this document. Units sold with an explosion proof or increased safety rating will include an 8200- 000 IEC or 8200-000 explosion proof elbow that will be affixed at the factory. For increased safety with D=4, elbow is not required.For SIL approval, add an “S” prefix to the desired Hazardous Area Certification (Option C).
