GE LTC MAP, LTC-MAP 2130 LTC-MAP Power

3-14 Section 3: Installation

February 3, 2000 70055MP Revision D

LTC-MAP Power

OEM potentiometers that are not powered require power from the LTC-

MAP’s 24 VDC Sensor Power Supply. To use the LTC-MAP supply, you

must:

• Select a Voltage Drop Resistor (Rd).

• Connect the Power Supply wires to the OEM Potentiometer.

• Connect the wires at the Monitor Circuit board.

In order to use this power, you must first calculate the value of the required

voltage drop resistor (Rd). The voltage drop resistor limits the current and

voltage across the potentiometer (see Figure 3-8).

Figure 3-8: Typical OEM Potentiometer Powered by LTC-MAP

To calculate Rd:

1. Determine the value and number of resistors in the potentiometer.

NOTE: LTC-MAP can accommodate any value or number of tap

position resistors.

2. Calculate the String Resistance (Rs) where:

Rs = (Resistor Value) x (Number of Resistors).

Contents

Main LTC-MAP 2130 Monitor Product Manual LTC-MAP 2130 Monitor Copyright Information Trademarks Warranty Revision History Table of Contents Section 1: Introduction Section 2: Getting Started Section 3: Installation Page Section 1: Introduction Product Overview Page Section 1: Introduction 1-3 70055MP Revision D February 3, 2000 Specifications Input 1-4 Section 1: Introduction February 3, 2000 70055MP Revision D General Section 1: Introduction 1-5 70055MP Revision D February 3, 2000 Electrical Environmental NOTE: Specifications subject to change without notice. Physical Enclosure Available Options Table 1-1: LTC-MAP 2130 Options Typical Application Page Manual Conventions Section 2: Getting Started Receiving Inspection Customer Support/Service Front Cover Layout Face Panel Layout Operating Conditions Button Alarm Status & Settings Button Acknowledge Alarm Button LCD Display < < Serial Port Circuit Board Location Section 2: Getting Started 2-7 70055MP Revision D February 3, 2000 I/O Board Figure 2-5: I/O Circuit Board POWER #2 #1 Page Page Communications Section 3: Installation Selecting a Location Mounting the Monitor Cable Installation 3-4 Section 3: Installation February 3, 2000 70055MP Revision D I/O Board Configuration Jumpers POWER 9V JP10 JP14 6V Modem Power Supply Configuration Jumper Table 3-2: Modem Power Supply Configuration (JP12) Alarm Configuration Jumpers Ground Jumpers Wiring Overview 3-8 Section 3: Installation GND #2 #1 HEATER Page Wiring the Sensors Wiring a Tap Position Indicator OEM Potentiometers 0 to +5 VDC or 0 to +10 VDC Power -5 to +5 VDC or -10 to +10 VDC Power LTC-MAP Power Page After-Market Wiring the AC Voltage Inputs Wiring the AC Current Inputs Wiring the Digital Inputs Wiring the Annunciator Outputs Wiring the Internal Heater Wiring Power Establishing Communications Serial Port Communications Modem Communications Initial Start Up Calibrate Tap Position Section 4: Operation Overview Operating Conditions Button Analog Channel Readings Screens Digital Channel Readings Screens Tap Change Summary Screen Alarm Status & Settings Button LTC-MAP Status Screen Current Time and Date Screen Acknowledging Alarms 70055MP Revision D February 3, 2000 Section 5: Troubleshooting Procedures Refer to Table 5-1 for common troubleshooting procedures. Table 5-1: Common Troubleshooting Procedures Page 70055MP Revision D February 3, 2000 Appendix A: User-Specific Information Forms Analog Channel Configuration Page Page Page Page Appendix B: Firmware Upgrades Page Page Appendix C: Glossary of Terms Index A B C F G H I L S T V W GE Energy Management . I S