BENTLY 3500/50M 133442-01

Description

Description
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:
l Speed Monitoring, Setpoint Alarming and Speed Band Alarming
l Speed Monitoring, Setpoint Alarming and Zero Speed
Notification
l Speed Monitoring, Setpoint Alarming and Rotor Acceleration
Alarming
l 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.

Specifications
Inputs
Signal Each 3500/50M Tachometer
Module accepts up to two
transducer signals from proximity
probe transducers or magnetic
pickups.
Input signal range +10.0 V to -24.0 V
Signals exceeding this range are
limited internally by the module.
Input impedance 20 k Ω (standard)
40 k Ω (TMR)
7.15 k Ω (Internal Barrier)
Power
consumption
5.8 watts, typical
Transducers Accepts 1 to 2 proximity
transducer signals
Restrictions may apply to
magnetic pickups. See on
page 2.
Outputs
Front Panel LEDs
OK LED Indicates when the 3500/50M
Tachometer Module is operating
properly.
TX/RX
LED
Indicates when the Tachometer Module
is communicating with other modules in
the 3500 rack.
Bypass
LED
Indicates when the Tachometer Module
is in Bypass Mode.
Buffered Transducer
Outputs The front of each module has one
coaxial connector for each channel.
Each connector is short circuit and ESD
protected.
Buffered outputs are available at the I/O