Liquid Controls LCR Install - Manual (Page 5)

5
Power Requirements
+9 to 28 Volts DC @ less than 3 Amps for entire register
including solenoid valves. The system can operate with
either a positive or negative ground.
Pulse Input
5 to 28 volt peak to peak square wave from an open
collector with pull-up resistor greater than 750 ohms.
Quadrature or single channel with a direction logic line.
Frequency not to exceed 2500 Hz.
Scaled Pulse Output
The scaled pulse output reflects net volume if temperature
compensation is being employed or gross volume if
temperature compensation is NOT employed. One pulse
will be output per least significant digit of the display, i.e.,
a system set to read in 1/10 gallon will provide one pulse
per 1/10 gallon (10 pulses per gallon).
Open drain output common to the negative power input
line. Sinking capability up to 150 mA. Maximum open
circuit voltage is 28 VDC.
Auxiliary Outputs
This output can be used to add features such as pump
control or additive injection.
Aux 1: Open drain output common to the negative power
input line. Sinking capability up to 1 Amp. Maximum
circuit voltage is 28 VDC.
Aux 2: Open drain output common to the negative power
input line. Sinking capability up to 150 ma. Maximum
open circuit voltage is 28 VDC.
Solenoid Outputs
Open drain transistor common to the negative power
input line. Sinking capability up to 1 Amp. Maximum
open circuit voltage is 28 VDC.
Up/Down/Reset pulse to Remote electronic counter
Open drain transistor capable of sinking 1 Amp.
Maximum open circuit voltage is 28 VDC.
Pulses are active low and are approximately 10 μsec in
duration. The LCD counter is reset by turning on both
outputs for 0.01 second.
RS-232 I/O Port
Meets EIA -232E standard but only incorporates four
signaling lines:
•
Transmit data
• Receive data
• Request to Send or Data Set Ready
• Clear to Send or Data Terminal Ready
The printer output port is compatible with the Epson TM
TM 290 II, TM 295, TM 300, TMU 200D, TMU 295
printers, Axiohm Blaster, and Okidata™ ML184 printer.
RS-485 I/O Port
Line terminations are SAE J1708 standard compatible
which allows up to 20 units per network.
RTD
Four-wire platinum sensor with 100 ohms resistance at
0°C and 138.5 ohms resistance at 100°C.
Accuracy per IEC 751 Class B.
Printer (Epson Model 295)
Operating temperature: -22° to 104°F (-30° to 40°C).
Printer must use multi-part NCR forms and operate
without a ribbon (impact image on form) to operate in the
low end of the temperature range.
Specifications