Base Load Controller Datasheeet

MODEL BLC SERIES
BASE-LOAD-CONTROLLER
Base-Load-Controller with 2 to 32 Outputs
The BLC Series Base-Load-Controller is microprocessor based and designed to control up to
31 base loads plus one SCR controlled load.
Mechanically, it consists of two assemblies:
the controller module (1 required) and the eight
channel output module (1 to 4 required).
DIP switches allow the user to easily program
for the number of base loads, (whether or not
an SCR controlled base load will be used) and
which control mode (up/down or circular) will
be used. Potentiometers provide easy adjustments for cycle time and input/output analog
signals i.e. 4-20mA. Diagnostic indicators
indicate operational status.
Designed to be used with one or more
zero-fired SCR Power Controller, HDR’s BaseLoad-Controller can help eliminate light flicker
normally associated with large zero-fired loads.
High harmonics and low power factor caused by
large phase- fired loads can be improved using
a base-load-controller combined with a phasefired SCR Power Control.
MODEL BLC
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Compact Size
Modular Design
Complete Solidstate
Diagnostics Indicators
Base Loads Individually Fused
Command Signal Indicator
Transient Protection
Optically Isolated Input Command
Signal 4-20mA
Slide-wire Input
Easily Programmable
Silkscreen Printed Circuit Board
Din-Rail Mounted
Refer to HDR Application Note 1012
for Additional Information
Applications:
Primarily used to control large resistive
heating loads
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High temperature furnaces
Large ovens, kilns & heaters
Boilers
Toll Free: 1-888-PWR-CNTL
1-888-7 9 7 - 2 6 8 5
Fax: 1-614-308-5506
Web: www.hdrpower.com
7/2004
SPECIFICATIONS:
Control Method:
Solidstate Relays
Voltage Rating:
120 or 240 Vac, 15 VA
Adjustments:
Ambient Temperature: Operating:
Storage:
Output Switch Rating: 280 Vac @ 3A
(100A pk surge)
Command Signal:
Isolation:
Zero and span,
up/down time
4-20mA, manual
potentiometer, slide wire
0o to 50o C
-10o to 70o C
Relative Humidity:
0 to 95% (non-condensing)
Weights:
Control module:
Output module:
1.5 lbs.
1 lb.
2500 volts rms from all
I/0 to ground
HOW TO ORDER:
Make one selection from each of the tables below.
Place the selections in the corresponding boxes to
build your model number.
1 CONTROL VOLTAGE
120 Vac
120
240 Vac
240
2 # OF BASE LOADS
01 to 31
01 to 31
BLC-
1
-
-
2
3
4
3 COMMAND SIGNAL TABLE
5
6
7
4 SCR DRIVE OUTPUT
4-20mA
01
No SCR Used
00
*Manual Pot Input
05
4-20mA
01
Slide-wire
06
*Requires external potentiometer (5K)
6 RAMP TIME
001 to 250 sec 001 to 250
∇
5 CONTROL MODE
Up/Down
01
Circular
02
7 CABLE LENGTH
1-3 Feet
1 to 3
Standard
∇
DIMENSIONS:
(leave blank)
If the controller module and all output modules will
NOT be mounted in one horizontal line, please
specify additional cable length needed.
Specifications subject to change without notice
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