Liquid Controls SP3000 - Manual (Page 8)

8
1.6 OUTPUT SPECIFICATIONS
1.61 ANALOG OUTPUT
Number:
1
Range: 4-20mA DC, sink only
Compliance Voltage Range: 3.0-24 VDC
Load Type: Non-Inductive
Accuracy: +/- 100
µA
Update Rate: 1 Hz
Analog Output Schematic:
A/D
CPU
19
18
100
~
1.62 DIGITAL FLOW PULSE OUTPUT
This output is intended to drive a counter with a minimum input impedance of 1000 ohms. It is also
compatible with TTL, LSTTL, and 5V CMOS logic inputs. It is slew rate limited to help prevent RFI.
Number:
1
Output High Voltage No Load: 4.5 Volts min.
4.0mA source: 4.5 Volts min.
Output Low Voltage No Load: 0.2 Volts max.
4.0mA sink: 1.0 Volts max.
Output Waveform: Symmetric square wave above 1Hz
100msec pulse below 1Hz
Max Output Slew Rate: 27 Volts/
µsec
Sustained Fault Voltage for
no permanent damage: 7 Volts
Transient Protection: 1500V 50
µsec
Pulse Output Schematic:
.001 F
1.5 F
TTL 5 VDC
@ 21mA
+ 5 VDC
CPU
3.3 K
3.3 K
3.3 K
220
220
21
20