I. Model Analysis

72053: The basic model of the 7200 series overspeed protection card

- 01: Standard version (standard input/output, standard temperature range, no special options)

II. Product Positioning and Usage

Function: Receives key phase signals (Keyphasor), real-time monitors shaft speed; outputs alarm / trip relay contacts when overspeed occurs, achieving three-out-of-two overspeed protection (standard feature of the 7200 series).

Application: Overspeed protection for high-speed rotating machinery such as steam turbines, gas turbines, large compressors, etc. (ETS).

Companion: Requires the 7200 series key phase probe (e.g., 72077-01) + extension cable.

III. Core Technical Parameters

Input: Key phase signals (square wave / pulse), compatible with 7200 series magnetic-electric / eddy current key phase probes

Speed measurement range: 0 - 20,000 RPM (typical)

Accuracy: ±1 RPM (full scale)

Output: 3 relay contacts (alarm + danger + trip), supports three-out-of-two voting

Power supply: Backplane -24 VDC power supply

Operating temperature: 0℃ - +60℃

Structure: Full-size card (Full-size), installed in the 7200 series rack

Channels: Single channel (speed) + three-channel voting output

IV. Differences from Similar Models (7200 Series)

72053-01: Overspeed protection card (speed + three-out-of-two trip)

72059-01R: Vibration preamplifier card (shaft vibration / displacement monitoring)

72065-01K: Lockable vibration preamplifier card (parameter locking, anti-misconfiguration)

72072-01: 14mm vibration probe (配套 72059/72065)

V. Alternatives and Upgrades

The 7200 series has been discontinued. The mainstream upgrade for overspeed protection is：

3500/53 Overspeed Protection Module (four channels， three-out-of-two， with overspeed test function， compatible with 3500 rack)

3300/53 Overspeed Card (transition model， gradually replaced by 3500)