Chapter 2: Installation
General Specifications
SG2 is a miniature smart PLR (Programmable Logic Relay) with a maximum of 44 I/O points and can
be programmed in Relay Ladder Logic or FBD (Function Block Diagram) program. The SG2 can
expand to its maximum I/O count by adding 3 groups of 4-input X 4-output modules.
12
SG2 PLR User Manual
Chapter 2: Installation
Power Supply
Input Power Voltage Range
DC Models: 20.4-28.8V
AC Models: 85-265V
Power Consumption
24VDC: 10-point, 90mA
20-point: 150mA
100-240VAC: 90mA
Wire Size (all terminals)
26 to 14 AWG
Programming
Programming languages
Ladder/Function Block
Program Memory
200 Lines or 99 Function Blocks
Programming storage media
Flash
Execution Speed
10ms/cycle
LCD Display
4 lines x 12 characters
Timers
Maximum Number
15
Timing ranges
0.01s–9999min
Counters
Maximum Number
15
Highest count
999999
Resolution
1
RTC (Real Time Clock)
Number available
15
Resolution
1min
Time span available
week, year, month, day, hour, min
Compare Instructions (Analog, Timer, or Counter Values)
Number available
15
Compare versus other inputs
Timer, Counter, or Numeric values
Environmental
Enclosure Type
IP20
Maximum Vibration
1G according to IEC60068-2-6
Operating Temperature Range
32° to 131°F (0° to 55°C)
Storage Temperature Range
-40° to 158°F (-40° to 70°C)
Maximum Humidity
90% (Relative, non-condensing)
Vibration
0.075mm amplitude
1.0g acceleration
Weight
10-point: 230g
8-point:190g
20-point: 345g
Agency Approvals
cUL , CE, UL
Discrete Inputs
Current consumption
4mA @12VDC
3.2mA @24VDC
1.3mA @100-240VAC
Input Signal ”OFF” Threshold
< 5VDC; < 40VAC
Input Signal ”ON” Threshold
> 15VDC; > 79VAC
Input On delay
DC: 5ms
240VAC: 50ms
120VAC: 90ms
Input Off Delay
DC: 3ms
240VAC: 50ms
120VAC: 90ms
Transistor device compatibility
PNP, 3-wire device only
High Speed Input frequency
1kHz
Standard Input frequency
< 40 Hz
Required protection
Inverse voltage protection required
Analog Inputs
Resolution
10 bit
Voltage Range acceptable
Analog input: 0-10VDC,
24VDC when used as discrete input
Input Signal ”OFF” Threshold
< 5VDC (as 24VDC discreet input)
Input Signal ”ON” Threshold
> 9.8VDC (as 24VDC discreet input)
Isolation
None
Short circuit protection
Yes
Total number available
A1-A8
Relay Outputs
Contact material
Ag Alloy
Current rating
8A
HP rating
1/3HP@120V 1/2HP@250V
Maximum Load
Resistive: 8A/point
Inductive: 4A/point
Maximum operating time
15ms (normal condition)
Life expectancy (rated load)
100k operations
Minimum load
16.7mA
Transistor Outputs
PWM max. output frequency
0.5kHz (1ms on,1ms off)
Standard max. output frequency 100Hz
Voltage specification
10-28.8VDC
Current capacity
1A
Maximum Load
Resistive: 0.5A/point
Inductive: 0.3A/point
Minimum Load
0.2mA
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