13-3
Chapter 13.  SPECIFICATIONS
External contact input
Number of input points
: 4 points
Input type: Potential free contact or open collector
Allowable ON  
contact resistance:
 
Max. 250 Ω
Allowable OFF  
contact resistance:
 
Min.100 kΩ
Allowable ON-state  
residual voltage:
 
Max. 1.0 V
Open terminal voltage: DC5.5 V±1 V
ON terminal current: Approx. 7.5 mA (at short-circuit), Approx. 5.0 mA (at contact resistance of 
250 Ω)
Min. hold time: 200 ms or more
Current transformer input
Number of input points
: 2 points
Input object: Current transformer with 100 to 4,000 turns (availability is by 100-turn 
units) 
Optional unit Model No.:  QN206A* (800 turns, hole diameter: 5.8 mm) 
Optional unit Model No.:  QN212A* (800 turns, hole diameter: 12 mm) 
* Not UL-certified.
Current measurement 
lower limit:
 
0.4 A AC (800 turns, 1 time) 
Formula; Number of turns ÷ (2000 × number of power wire loops)
Current measurement 
upper limit:
 
50.0 A AC (800 turns, 1 time) 
Formula; Number of turns 
÷
 (16 
×
 number of power wire loops)
Allowable measured 
current:
 
70.0 A AC (800 turns, 1 time) 
Formula; Number of turns ÷ (16 × number of power wire loops) × 1.4
Display range lower 
limit:
 
0.0 A AC
Display range upper 
limit:
 
70.0 A AC (800 turns, 1 time) 
Formula; Number of turns ÷ (16 × number of power wire loops) × 1.4
Display accuracy: ±5 %FS
Display resolution:
0.1 A AC