I. Model Analysis

7203954: Original factory material code (order number) for 3500/42M module

‑01: Standard version (standard temperature range, standard firmware, no special customization)

Alias: 3500/42M (commonly used market model name)

II. Product Positioning and Usage

Function: Receives 4 channels of eddy current / magnetic sensor signals, each channel can be independently configured, capable of monitoring:

Radial vibration (shaft vibration)

Axial displacement (thrust)

Differential expansion (temperature difference)

Offset, acceleration, speed, etc.

Output: 4‑20mA analog output + alarm / dangerous relay, supports software configuration of alarm values.

Application: Key rotating machinery TSI systems such as steam turbines, gas turbines, compressors, fans, etc.

Companion: Compatible with 3300XL/7200 series probes (e.g., 330104, 72072‑01).

III. Core Technical Parameters

Channels: 4 channels (can be grouped in pairs, dual-function parallel)

Input: Eddy current / speed / acceleration sensors, -10 to +10VDC

Accuracy: ±0.2% FS (full scale)

Resolution: 0.366μA/bit

Power consumption: 7.7W (‑24VDC power supply)

Operating temperature: -40℃ to +85℃

Structure: Full-height card, 3500/05 rack installation, supports hot swapping

Configuration: 3500 rack software programming, independent alarms for channels (warning / danger)

IV. Comparison with 7200 Series (Upgrade Points)

Table

Item 7203954-01 (3500/42M) 72052-01 (7200 dual displacement card)

Number of channels 4 channels (multifunctional) 2 channels (only displacement)

Configuration Software flexible configuration, multiple parameters Hardware jumpers, fixed functions

Output 4‑20mA + relay Only relay

Compatibility Compatible with 3300/7200 probes Only 7200 probes

Status Active mainstream Outdated and discontinued

V. Alternatives and Compatibility

Direct replacement: 3500/42M (7203954-01), new / second-hand available.

Downward compatibility: Can directly replace old 72052-01, 72059-01R, etc., requires reconfiguration.

Upgrade suggestion: Upgrade the old 7200 system, prioritize **3500/42M + 3500/53 (overspeed)** combination.