MKS 651C, Instruction Manual, Page: 128 / 172

Appendix A: Product Specifications
114
Input power
Low power unit
High power unit
90 to 132 or 180 to 264 VAC @50/60 Hz
75 VA (max)
90 to 132 or 180 to 264 VAC @48/62 Hz
150 VA (max)
Interface
RS-232
Analog
Digital
Inputs (16): HCMOS pulled high with a 4.7k
resistor to be TTL compatible. Driver must
sink 1 mA and hold low for > 50 msec to
select function.
Outputs (6): HCMOS with 240 ohm series
protection resistor. Will sink & source 1 TTL
load. Time constant < 500 nanoseconds.
Output power
Low power unit
High power unit
±15 VDC @ 0.5 Amps (max)
3
±15 VDC @ 1.5 Amps (max)
Overrange pressure ±10.5 Volts
Pressure input signal -10 to 10 Volts
Process limit relays (2) 24 Volts AC/DC @ 1 Amp resistive (contact
ratings)
Set points
Internal
External 5, each one pressure or position selectable
1, pressure or position selectable
Size
with optional valve failsafe battery backup
3½”H x 9½”W x 9”D
(8.9 cm x 24.1 cm x 22.9 cm)
12”D (30.5 cm)
Weight
Low power unit
High power unit 7 lbs. 3 oz. (3.26 kg)
6 lbs. (2.04 kg)
plus 3 lbs. 8 oz. (1.25 kg) for optional valve
failsafe battery backup
Due to continuing research and development activities, these specifications are subject to change without notice.
3
Derated to 0.4 Amps with 90 to 99 or 180 to 198 VAC input.