Instruction Manual
Tek-LCD 7801C
www.tek-trol.com
Technology Solutions
10
Non-Resettable Total
Total can be setup to be non-resettable to prevent unintentional
reset. This can be changed in the Setup Totals menu.
Total Units Conversion
Input: Rate channel; Total units can be different than rate units.
Use the custom units to convert to any unit (e.g. Gallons to MGal:
Factor = 0.000001)
Pulse Input K-Factor
K
-
Factor = pulses/units of measure
; Calculates total directly from
pulse input, Modbus input, channel, total, or Modbus output.
Create rate channel by entering K
-
Factor, units and time base in
sec, min, hr, or day; Decimals: 0 to 15
Count Down
Total can be setup to count down from a predetermined value
entered by the user
Roll-Over
Enter the value for total to roll-over to 0
Negative Total
Allow total value to count below 0 for bi-directional flow based on
rate channel
Total Bar Graph
Bar
graph can be scaled to represent the expected maximum total
Date Format
Month, day, year
Time Format
24 hour; 00: Midnight hh: mm: ss
Battery
3 V, P/N: CR2032 included
Display Date & Time
Displayed on the top line of Setup and View menus, including day
of the week
Screens
Date & Time can be added to any screen
Channels
Date & Time can be the input to a channel;
Display Format: yyyy/mm/dd hh:
mm: ss
Analog Inputs
(4) Analog inputs/card
;
(4) Pulse inputs/card
; (28) Analog inputs
max
;
28) Pulse inputs max
;
(5) Relays/card
;
(30) Relays max with (4)
analog or (4) pulse inputs;
no other I/O
; 199 Modbus RTU;
Digital Inputs
5 Inputs, non-
isolated, 30 VDC max
•
Low: 0 to 1.2 V
•
High: 2.8 to 30.0 V
•
Internal pull-
up: 5 kΩ to 5 V
•
Max pulse frequency: 1 kHz @ 5 Vp
-p
•
+5 V terminal: Internal pull-
up 100 Ω
Note: Pulse inputs can be used as digital inputs
Typical Input
4-20mA
Input Range
0-24mA
Analog Outputs
(5) Analog outputs/card
;
(35) Analog outputs max with
no other I/O cards (Seven I/O slots)
Digital Outputs
4 Outputs
•
Low: 0 V (no load), 1.5 V max @ 10 mA sink (External pull
-
up)
•
High: 5.0 V (no load), 3.5 V @ 10 mA load
•
Maximum current: 30 mA Output impedance: 100 Ω
•
Output protection: 150 mA auto-resettable fuse
•
Max fre
quency: 5 Hz
