Summary of Contents for Baldor BC145
- Page 1 SIGNAL ISOLATOR BC145 Signal Isolator Board Installation and Operating Manual 7/2000 MN1373...
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Page 2: Table Of Contents
6C. Process Control with Auto (Ratio Pot)/Manual Switch ....... . . 11 6D. Auto/Manual Operation with Potentiometer on BC145 Input ......11... -
Page 3: Safety Warning
SAFETY WARNING! Please read carefully: Be sure to follow all instructions carefully. Fire and/or electrocution can result due to improper use of this product. This product should be installed and serviced by a qualified technician, electrician, or electrical maintenance person familiar with its operation and the hazard involved. Proper installation, which includes wiring, mounting in proper enclosure, fusing or other over current protection and grounding, can reduce the chance of electric shocks, fires, or explosion in this product or prod- ucts used with this product, such as electric motors, switches, coils, solenoids, and relays. -
Page 4: Introduction
The BC145 is versatile since it can accommodate a wide range of input voltages (0 - 25*, 0 - 120 and 0 - 550V DC) and, in addition, a wide range of input current signals (4 - 20 mA, 10 - 50 mA and 1 - 5 mA). -
Page 5: Control Layout & Mechanical Specifications
FIGURE 1 – CONTROL LAYOUT & MECHANICAL SPECIFICATIONS (INCHES / [mm]) (Illustrates Factory Setting of Jumpers and Approximate Trimpot Settings) 4.843 [123.00] 0.276 [7.00] 0.276 4.291 [7.00] [109.00] 2.244 VOLT [57.0] 2.795 [71.0] (4) mounting holes for #6 screws... -
Page 6: General Performance Specifications
TABLE 1 – GENERAL PERFORMANCE SPECIFICATIONS AC Power Requirements ......115 or 208 - 230V AC, 50/60 Hz Signal Input Voltage . -
Page 7: Wiring
12” (30 cm) – Do not ground shield. 115V AC AC Power – The BC145 is powered with either 115 or FIGURE 2B – 230V CONNECTION 230V AC, 50/60 Hz by arranging the jumpers between terminals “1”... -
Page 8: Current Input Signal Connection
Note: The Voltage/Current (VLT/CUR) jumper must be in “CUR” position. Connect the negative current signal input to terminal “5” and the positive to terminal “6.” The BC145 is factory calibrated so 150Ω Resistor that a 4 - 20mA signal will provide a 0 - 9 Volt output. The input... -
Page 9: Voltage Input Signal
Note: The Voltage/Current (VLT/CUR) jumper must be in the VLT position (factory setting). The BC145 is designed to accept a wide range of input voltage signals as follows: TABLE 2 – VOLTAGE INPUT SIGNAL FIGURE 4 –... -
Page 10: Output Signal
OUTPUT SIGNAL The output signal from the BC145 is obtained from terminals “9” (-) and “10” (+). Connect the output directly to the signal following input terminal of the speed control. For multiple follower motors, several controls can be driven from a single BC145. -
Page 11: Leader/Follower Voltage Following System With Multiple Motors
FIGURE 5 – LEADER/FOLLOWER VOLTAGE FOLLOWING SYSTEM WITH MULTIPLE MOTORS A) From a Single Main Motor Leader Motor Follower Ratio 5KΩ 10(+) Motor #1 A(+) A(+) BC141 BC141 BC145 9(–) A(–) A(–) F(–) Isolation Diode Follower Motor #2 A(+) BC141 A 10K ratio poten-... -
Page 12: A Leader/Follower Voltage Following System
9(–) A(–) A(–) Speed FIGURE 6B – PROCESS CONTROL WITH AUTO/MANUAL SWITCH Manual 5K Pot 5K Speed Pot Auto/Man The BC145 can be wired in an Auto/Manual mode Motor which will allow 10(+) A(+) manual override of an automatic BC145 CONTROL process. -
Page 13: C. Process Control With Auto (Ratio Pot)/Manual Switch
“MAN” BC145 CONTROL mode it is used for A(–) 9(–) F(–) manual speed adjust- ment. 5K Pot FIGURE 6D – AUTO/MANUAL OPERATION WITH POTENTIOMETER ON BC145 INPUT Auto/Man 5K Pot Motor 10(+) A(+) Process Signal CONTROL BC145 0 - 10V DC 9(–) -
Page 14: Limited Warranty
V. LIMITED WARRANTY For a period of 2 years from date of original purchase, BALDOR will repair or replace without charge controls which our examination proves to be defective in material or workmanship. This warranty is valid if the unit has not been tampered with by unauthorized persons, misused, abused, or improperly installed and has been used in accordance with the instructions and/or ratings supplied.