Trimec rt11 - Specifications

18
7. TERMINAL DESIGNATION
Terminal layout - links & remote switch inputs
Introduction 3
1.2 Specifications
Display : 8 digit alpha numeric LCD characters 9mm ( 0.35 ”) high with
second line sub script text, 8 digits totalising, 5 digits rate,
3 programmable decimal points with all displays.
Signal Input : Universal pulse/frequency input compatible with Reed switch,
Hall effect, Namur proximity detectors, Pulse wire, optical &
Coil~sine (15mV P-P min). Maximum input frequency 10Khz.
Minimum input frequency for rate display is 0.1hz with low
frequency cut off feature enabled, 0.3hz when disabled & 0.7hz
if the non-linearity feature is enabled. Totals have no mimimum.
Battery power : Battery life expectancy can be up to 5~10 years when
(reverse polarity protected) programmed with the unique “Ultra Power Save” sleep cycle.
Battery life reduces when connected with a coil input from turbine
flowmeters. Rate display defaults to total display 4 minutes after
pressing the rate key in order to conserve battery power.
External power : Regulated 8~24Vdc x 150mA or 4~20mA loop powered. Rate or
total display will remain visible at all times when selected.
Pulse output : NPN-PNP transistor, scaleable or non-scaleable, 1A max.
Analog output : Two wire loop powered, 12~28Vdc into 100~900Ω loop load,
accuracy +/-0.1% FS, key entry programming of Zero & Span.
Alarm outputs : Two NPN-PNP selectable FET (transistors) programmable low &
high flow alarms with adjustable deadband (reset differential).
Maximum drive 100mA resistive load. 24Vdc max.
Physical : A) IP66 (NEMA 4X) high impact glass reinforced nylon enclosure.
B) 3 x M20 or ½” NPT female conduit entries.
C) 122mm diameter x 61mm deep x 400g (0.9lb).
D) Temperature range from -20ºC to +80ºC ( -4ºF to +176ºF).
Configuration : Flow chart data entry with scrolling English text prompts. 4 digit
PIN number set-up protection. Programmable rate units & time
base for rate, rate dampening, decimal points & low freq. cut-off.
K-factor range : Eg. Pulses/litre, gallon, lb etc. Programmable range is 0.001~
9999999.999 with a floating decimal point during K-factor entry.
Engineering units : Selectable Ltr, gal, m3, kgs, lbs (total). /sec,min,hr or day (rate).
Rate conversion : Enables the rate to be displayed in different engineering units to
that of the totals eg: totals in barrels (oil) & rate in US gallons.
Battery modes : Ultra power save, standby or continuous display selectable.
Dual Inputs option : Programmable for computations of A+B, A-B, or A÷B (ratio).
LINKS 13 & 14
select NPN or PNP
style alarm outputs
13
PNP
NPN
14
SER.
ON
1 2 3
A
ON 1 2 3
B
7A
1
2
3
4
5
6
7
14
13
12
11
10
9
8
Inhibit total
switch
( clause 2.5 )
REP (repeater pulse)
SPO (scaled pulse)
0 0 0
PNP
NPN
7B
LINK 7B
Select NPN or PNP
style pulse output
LINK 7A
select SPO or REP pulse
output ( see clause 4.8 )
SWITCH 1 :
ON engages 0.01µf capacitor to
suppress reed switch bounce
SWITCH 2 : ON engages 1 meg Ω pull up resister
SWITCH 3 :
ON engages 820
Ω
pull down resister
0
0
0
REMOTE KEYS
reset
rate / total
program
accum. total
use momentary
action switches
0
0
0
battery
Flow input
conditioning DIP
switches
Terminals 1, 2 & 5 replicate
terminals 3, 4 & 5 for dual
flow inputs
Terminal
-0V (ground) 8
not used 9
not used 10
-4~20mA output 11
+4~20mA output 12
Low flow alarm 13
High flow alarm 14
Terminal
2
3
4
6 +8~24Vdc in
7 Pulse output
5 -0V (ground)
Flow
input B
Flow
input A
1