Input

Model

751i/iX 
(1 Phase Output)

1501i/iX 
(1 Phase Output)

2253i/iX 
(1 or 3 Phase Output)

Voltage

115Vrms +/- 10% or 
230Vrms +/- 10%

115Vrms +/- 10% or 
230Vrms +/- 10%

115Vrms - 230Vrms +/- 10% (Universal Input) - (Output rated 1500 VA @ 115 V input. 115V-180V input derated linearly 1500 VA - 2250 VA)

Frequency

47 - 63 Hz

47 - 63 Hz

47 - 63 Hz

Current

<8.5 Arms @ 115 V 
<4.4 Arms @ 230 V

<17 Arms @ 115 V 
<8.8 Arms @ 230 V

<20 Arms @ 115 V 
<15 Arms @ 230 V

PF

0.97 (typical @ full load)

0.97 (typical @ full load)

0.98 (typical @ full load)

Efficiency

80%

80%

77%

AC Output

Model

751i/iX 
(1 Phase Output)

1501i/iX 
(1 Phase Output)

2253i/iX 
(1 or 3 Phase Output)

Voltage

Hi : 0 - 300Vrms 
Low : 0 - 150Vrms

Hi : 0 - 300Vrms 
Low : 0 - 150Vrms

Hi : 0 - 300Vrms 
Low : 0 - 150Vrms

Max. Current

Hi : 3.25Arms 
Low : 6.5Arms

Hi : 6.5Arms 
Low : 13Arms

Hi : 3.25Arms (per phase) 
Low : 6.5Arms (per phase)

Peak Current

Hi : 10 A Peak
Low : 20 A Peak

Hi : 20 A Peak 
Low : 40 A Peak

Hi : 10 A Peak (per phase) 
Low : 20 A Peak (per phase)

AC Power

750VA

1500VA

750VA (per phase)

Distortion

< 1% THD

< 1% THD

< 1% THD

DC Output

Model

751i/iX 
(1 Phase Output)

1501i/iX 
(1 Phase Output)

2253i/iX 
(1 or 3 Phase Output)

Voltage

Hi : 0 - 400Vdc 
Low : 0 - 200Vdc

Hi :0 - 400Vdc 
Low : 0 - 200Vdc

Hi : 0 - 400Vdc 
Low : 0 - 200Vdc

Max Current

Hi : 1.63Adc 
Low : 1.63Adc

Hi : 3.25Adc 
Low : 1.63Adc

Hi : 1.63Adc (per phase) 
Low : 3.25Adc (per phase)

High Range

500W

1000W

500W (per output)

Low Range

250W

250W

500W (per output)

Voltage Accuracy/Programming Resolution (AC/DC)

Model

751i/iX 
(1 Phase Output)

1501i/iX 
(1 Phase Output)

2253i/iX 
(1 or 3 Phase Output)

Accuracy(ALC Mode ON)

0.1% FS (from 5V to FS)

0.1% FS (from 5V to FS)

0.1% FS (from 5V to FS)

Programming Resolution

0.1V

0.1V

0.1V

Frequency

Model

751i/iX 
(1 Phase Output)

1501i/iX 
(1 Phase Output)

2253i/iX 
(1 or 3 Phase Output)

Range

16 – 1000Hz

16 – 1000Hz

16 – 1000Hz

Resolution

0.01 Hz (16 – 81.91 Hz), 
0.1 Hz (82.0 – 819.1 Hz) 
1 Hz (820– 1000 Hz)

0.01 Hz (16 – 81.91 Hz), 
0.1 Hz (82.0 – 819.1 Hz) 
1 Hz (820– 1000 Hz)

0.01 Hz (16 – 81.91 Hz), 
0.1 Hz (82.0 – 819.1 Hz) 
1 Hz (820– 1000 Hz)

Accuracy

0.025%

0.025%

0.025%

Measurements

Model

751i/iX 
(1 Phase Output)

1501i/iX 
(1 Phase Output)

2253i/iX 
(1 or 3 Phase Output)

Voltage Accuracy

V: 0.1% FS

V: 0.1% FS

V: 0.1% FS

Current Accuracy

C: 0.5% FS

C: 0.5% FS

C: 0.5% FS

Mechanical Specifications

Model

751i/iX 
(1 Phase Output)

1501i/iX 
(1 Phase Output)

2253i/iX 
(1 or 3 Phase Output)

Dimensions

H: 3.5“ (89mm) 
W: 19” (483mm) 
D: 23“ (584mm)

H: 3.5“ (89mm) 
W: 19” (483mm) 
D: 23“ (584mm)

H: 5.25“ (133mm) 
W: 19” (483mm) 
D: 23“ (584mm)

Weight

Operating Temperature

Interfaces

Model

751i/iX 
(1 Phase Output)

1501i/iX 
(1 Phase Output)

2253i/iX 
(1 or 3 Phase Output)

USB

Standard

Standard

Standard

GPIB

Option (i) Std (iX)

Option (i) Std (iX)

Option (I) Std (IX)

LAN (LXI Ethernet)

Option (iX)

Option (iX)

Option (IX)

RS232

N/A

N/A

Standard

Note: Specifications are subject to change without notice. Specifications are warranted over an ambient temperature range of 25°± 5° C. Unless otherwise noted; specifications are per phase for a sine wave with a resistive load and apply after a 30 minute warm-up period. For three phase configurations, all specifications are for L-N. Phase angle specifications are valid under balanced load conditions only.