Bell & Gossett 10 001 265R5 TechnoForce Pump Controller - Manual (Page 52)

TECHNOFORCE Installation, Operation, and Maintenance 46
Maintenance
6. Maintenance
6.1 Preface
The following is a description of the hardware, diagnostics, and corrective action to maintain a process being
controlled by the Pump Controller.
NOTE: THE FOLLOWING SHOULD NOT BE INTERPRETED AS THE MAXIMUM
CONFIGURATION OF THIS CONTROLLER, RATHER THIS DESCRIBES ITS APPLICATION AS A
TECHNOFORCE PUMP CONTROLLER ONLY.
6.2 Technical Overview
The Pump Controller is a microprocessor based dedicated pump controller unique to and exclusively
manufactured by Xylem Bell & Gossett. All aspects of this unit are strictly proprietary to Xylem Bell & Gossett.
6.3 Digital Inputs
The controller has provision for digital inputs with an operating voltage of 24 VDC. This signal voltage must be
obtained from the 24 VDC power supply mounted to the subpanel.
It is not recommended that other power sources be used without factory approval.
Customer connections are made directly to the terminals blocks wired to the digital input module.
6.4 Digital Outputs
The controller has provision for relay outputs to control 240V 50/60 HZ devices.
The relays are not removable. If defective, the digital output module must be returned to the factory for repair.
All relays operate as single pole single throw. Components are provided to reduce contact arc and extend
electrical life.
Customer connections are made directly to the terminals blocks wired to the digital output module.
6.5 Analog Inputs
Analog inputs are provided for process variables and optional transmitters. All analog inputs operate at 4-20mA.
They must be powered from 24 VDC power supply included with the controller
6.6 Memory
The logic is stored in a non-removable flashPROM chip which can only be updated from the RS-232 program
port on the CPU. The user setup data is stored in non-volatile memory of fixed RAM. While the controller is
powered up, the CPU controller provides the power to save the user values. When the controller is powered
down a 3V lithium ion battery provides the power to store the user’s values. When the battery voltage drops
below 2.5VDC the controller will display *ALARM*. The battery should be replaced as soon as practical to
avoid losing all station settings in the event of a power loss.
6.7 CPU
The CPU does not require any maintenance, and cannot be replaced as a field repair.