AB-6528 
4 
Specifications 
Basic specifications 
Item Specification 
Rated voltage  100 V AC to 240 V AC, 50 Hz/60 Hz 
Allowable voltage range 85 V AC to 264 V AC, 50 Hz/60 Hz 
Power shutdown 
detection 
80 V AC or less 
Power consumption  40 VA 
Power supply 
Leakage current  1 mA or less 
Ambient temperature  0 C to 50 C 
Ambient humidity  10 %RH to 90 %RH (Non-condensing) 
Altitude  2000 m or lower 
Rated operating 
conditions 
Vibration  Max. 3.2 m/s² (at 10 Hz to 150 Hz) 
Ambient temperature  -20 C to 60 C 
Ambient humidity  5 %RH to 95 %RH (Non-condensing) 
Vibration for storage  Max. 3.2 m/s²  (at 10 Hz to 150 Hz) 
Environmental 
conditions 
Transport/storage 
conditions 
Vibration for transport  Max. 9.8 m/s²  (at 10 Hz to 150 Hz) 
Green LED ON:  Power ON 
Power supply 
(POWER) 
Green LED OFF:  Power OFF 
Red LED ON:  Major failure or system restart 
Major failure (ERR1) 
Red LED OFF:  Normal operation 
Red LED ON:  Minor failure or system restart 
Operation 
Minor failure (ERR2) 
Red LED OFF:  Normal operation 
LED indication 
Communication  NC-bus  Transmit (TX), Receive (RX) 
RAM, RTC*  Lithium battery backup 
Power failure backup 
Data file  Non-volatile memory backup 
Transmission system  Current transmission 
Transmission speed  4800 bps 
Transmission distance 500 m 
Communications NC-bus 
Remote units  Max. 25 remote units connectable 
Weight 400 g 
Material (housing), color  Modified PPE, light gray 
Power supply, ground  M3 screw terminals (7.62 mm pitch between terminals)  
Terminals connection 
NC-bus communication  Quick-fit screwless (clamp) terminal block 
 
Wiring specifications 
Basic unit 
Item Wiring Wiring length Condition 
Power supply  JIS IV
 
2.0 mm² or JIS CVV
 
2.0 mm² or greater     
Grounding  JIS IV2.0 mm² or JIS CVV2.0 mm² or greater    Ground resistance: 100  or lower 
NC-bus    JCS  IPEV-S 0.9 mm²  500 m   
Notes: 
  Pin terminals cannot be used. 
  JIS: Japanese Industrial Standards 
  JCS: Japanese Electric Wire and Cable Makers’ Association