3500 System Introduction

The 3500 System provides continuous, online monitoring suitable for machinery protection applications, and is designed to meet the requirements of the American Petroleum Institute’s API 670 standard for such systems. The system’s modular rack-based design includes the following components:

1.3500/05 Instrument Rack (required)

2.One or two 3500/15 Power Supplies (required)

3.3500/22M Transient Data Interface (TDI) Module (required)

4.One or more 3500/XX Monitor Modules (required)

5.One or more 3500/32M (4-channel) or 3500/33 (16-channel)

Relay Modules (optional)：

1.One or two 3500/25 Keyphasor* Modules (optional)

2. One or more 3500/92 Communication Gateway Modules(optional)

3. Input/Output (I/O) Modules (required)

4. 3500/94M VGA Display (optional)

5. Internal or external intrinsic safety barriers, or galvanic isolatorsfor hazardous area installations (optional)

6. 3500 System Configuration Software (required)

System components are described in more detail in the followingsection and in their individual datasheets.

3500/50M Tachometer Module 

The 3500/50M Tachometer Module is a 2-channel module that accepts input from proximity probes or magnetic pickups to determine shaft rotative speed, rotor acceleration, or rotor direction. The module compares these measurements against user-programmable alarm setpoints and generates alarms when the setpoints are violated. 

The Tachometer Module is programmed using the 3500 Rack Configuration software. The following configuration options are available:

1. Speed Monitoring, Setpoint Alarming and Speed Band Alarming

2. Speed Monitoring, Setpoint Alarming and Zero SpeedNotification

3.Speed Monitoring, Setpoint Alarming and Rotor Acceleration Alarming

4. Speed Monitoring, Setpoint Alarming and Reverse Rotation Notification

The 3500/50M Tachometer Module can be configured to supply conditioned Keyphasor signals to the backplane of the 3500 rack for use by other monitors. Therefore, you don't need a separate Keyphasor

module in the rack.

The 3500/50M Tachometer Module has a peak hold feature that stores the highest speed, the highest reverse speed, or the number of reverse rotations that the machine has reached. You can reset the peak values