Campbell Scientific SC532A CS I/O Peripheral to RS-232 Interface - Manual (Page 6)

SC532A 9-Pin Peripheral to 9-Pin RS232 Interface
3. Specifications
Input voltage
(to POWER jack) A) 5 Volt Peripherals require 6 − 17 VDC
B) 12 Volt Peripherals require 12 − 17 VDC
Barrel connector: inner bore (+), outer sleeve ( −)
(factory 120 V AC adapter supplies 12 VDC
unregulated @ 1A)
Output voltages +5 VDC ± 0.075 VDC on PERIPHERAL connector
pin 1 and 6
− 17 VDC on PERIPHERAL connector
pin 8, depending on AC adapter in use (12 VDC
unregulated with factory AC adapter)
Current available to
5 V peripheral +5 VDC @ 120 mA maximum at 25 °C
derate 12 mA for each AC adapter Volt above 9 VDC
derate 1 mA for each
°C above 25°C
Current available to
12 V peripheral Factory provided AC adapter supplies unregulated
12 VDC @ 1 Amp
RS232 output levels +10 VDC ± 1 VDC
−10 VDC ± 1 VDC
Maximum output impedance = 1100
Ω
RS232 input levels ± 30 V maximum
Low threshold
≤ 0.8 V
High threshold ≥ 3.5 V
Input impedance at least 3000 Ω
9-pin inputs Low ≤ 1 V; High ≥ 3.5 V
9-pin outputs Low ≤ 0.5 V; High ≥ 3.5 V
Current drain 5 mA typical quiescent
10 mA maximum quiescent
Port Configuration PC: 9-pin D-Subminiature Female configured as DCE.
Peripheral: 9-pin D-Subminiature Female connects to
peripheral through SC12 Two Peripheral Connector
Cable supplied with the SC532A.
Dimensions 4 5/8 x 1 3/4 x 1 inches (allow up to 1 1/4 inches
extra on 1 3/4 dimension for power connector strain
relief)
Weight 1 1/4 pounds with AC adapter
2