Model Interpretation

1900/27‑XX‑XX

1900/27: Base model (single‑channel seismic monitor, 4‑20 mA output, no TIM)

First XX (Power):

00: 24 VDC (18–36 VDC)

01: 115/230 VAC (50/60 Hz)

02: 85–264 VAC / 110–370 VDC (universal)

03: 24 VDC + intrinsically safe (IS)

Second XX (Options):

00: No extra options

Common part number: 141486‑01

Technical Parameters

Mechanical

Form Factor: Stand‑alone, wall‑mount

Dimensions (H×W×D): 132 mm × 132 mm × 71.1 mm

Weight: ~0.4 kg

Enclosure: Industrial plastic, IP20 (front)

Inputs

Channel: 1 dynamic seismic input (accelerometer)

Sensor Compatibility: Trendmaster® 2000 accelerometers (100 mV/g sensitivity)

Measurement: Vibration velocity (peak)

Frequency Response: 8 Hz (–3 dB high‑pass) to >4 kHz (low‑pass)

Range: 0–50 mm/s (0–2 in/s) peak velocity, software‑selectable

Accuracy: ±1% full‑scale

Outputs

Analog Output: 4‑20 mA (isolated, proportional to vibration value)

Relays: 2 × DPDT (Alert, Danger); 5 A @ 250 VAC / 30 VDC

Buffered Output: BNC (raw transducer signal)

No TIM Interface (use 1900/25 for Trendmaster® 2000 system connection)

Power & Environmental

Power: 24 VDC, universal AC/DC, or 115/230 VAC (per model)

Power Consumption: ~8 W

Operating Temp: −40°C to +70°C

Humidity: 5%–95% RH, non‑condensing

Status LEDs: OK, Alert, Danger, Fault

Display: LCD (real‑time value, ~0.8 s refresh)

Communications

No Modbus/Ethernet

No TIM (Trendmaster® 2000 interface)

Core Functions

Single‑Channel Seismic Monitoring: Measures bearing‑housing vibration via accelerometers.

Dual Alarm Thresholds: Independent Alert (warning) and Danger (trip) with adjustable delay (0.1–30 s).

4‑20 mA Analog Output: Direct interface to DCS/PLC for remote trending and control.

Local Indication & Diagnostics: LCD readout + LED status; sensor fault detection (open/short/out‑of‑range).

Stand‑Alone Operation: No system required; ideal for local machinery protection.

Applications

General Industry: Pumps, fans, blowers, motors (bearing‑housing vibration).

Oil & Gas: Auxiliary equipment, non‑critical compressors.

Power: Cooling tower pumps, boiler fans, small turbines.

Retrofit Projects: Replaces older seismic monitors; preferred when 4‑20 mA signal is required.