IBM X.25 - Manual (Page 14)

Specifications
Size
Length: 181 mm (7.125 inches)
Width: 17.5 mm (0.7 inches)
Height: 127 mm (5.0 inches)
Weight: 0.15 kg (0.33 lbs)
Environment
Air temperature:
Operating: 10 to 35°C (50 to 95°F)
Non-Operating: 0 to 60°C (32 to 140°F).
Humidity:
Operating: 5% through 90%.
Electrical
Optimum Voltages: Maximum Current:
+4.8 V dc to +5.25 V dc 1.2 A
+11.3 V dc to +12.7 V dc 10 mA
–11.3 V dc to –12.7 V dc 16 mA
1-2 X.25 Co-Processor PCI GTO