KEP RTP Dual Data sheet

RTP

Features

• Two pulse and three control inputs

• Displays: A Rate, A Total, B Rate, B Total, A+B
Rate, A+B Total, A-B Rate, A-B Total, Grand
Total

• Separate Scaling Factors For A & B Inputs

Two Separate Ratemeters, Totalizers
With Two Line LCD Display

• Two relay outputs with LED Indication

• RS232/ RS485 port for serial communication
and printing

• Security lockout

• 4-20 mA output (optional)

DESCRIPTION:

The RTP is a presettable Ratemeter and Totalizer from two
pulse inputs. It can show rate and total at the same time on the
2 X 16 backlit LCD display. Both inputs can have up to 16 point
linearizing k factors. The unit can be connected in a network for
Data Acquisition.

SPECIFICATIONS:

INPUT POWER: AC: 100 to 260 VAC; 6.5 VA

DC: +24 VDC ; 250 mA max.

THRESHOLD: High: 4-24 VDC; Low: < 1Vdc or open
INPUT A: Count Input, 5 kHz max.
INPUT B: Count Input, 5 kHz max.
INPUT C: Control Input
INPUT D: Control Input
INPUT E: Control Input (Not Used with RS485
NOTE: AC powered units have isolated inputs. DC units share

-DC with input common.

OUTPUT POWER: +20VDC @50 mA (unreg), +/- 15%
DISPLAY: 2 lines of 16 characters, backlit LCD

(character size: 2.95mm x 5.55mm)

DISPLAY RESOLUTION: 6 Digit Total, 6 Digit Rate
BEZEL: NEMA 4/IP65 rated membrane keypad
INDICATORS: Two LED’s to indicate control output status.

(Red = Output A, Green = Output B)

MEMORY: NVRAM retains data on power failure
TEMPERATURE: Operating : 0 to 50 degrees C

Storage : -40 to 90 degrees C

HUMIDITY: 10% to 90% ( Non condensing )
SIZE: Bezel: 103mm X 55 mm; Depth:97 mm
PANEL CUTOUT: 92 mm X 45 mm (1/8 DIN size cutout )
IMMUNITY TO ESD: Level 3 per IEC1000-4-2
IMMUNITY TO TRANSIENTS: Level 3 per IEC1000-4-4
RADIATED SUSCEPTIBILITY: Level 3 per IEC1000-4-3
EMISSIONS: EN55011 CISPR A

RATEMETERS/TOTALIZERS

Flow Instruments

• NVRAM to retain data on power failure

• NEMA 4 / IP65 Front Panel

PULSE INPUTS

The RTP can accept two pulse inputs ( A&B ). It computes rate
and total of A, B, A+B and A-B. For both inputs the user can
define up to 16 points of “k” factors. This allows linearization of
the displayed rate, which is useful in improving the accuracy of
the flowmeter.

The rate is computed within 300 ms per input. To stabilize the
rate display, the user can select normalizing factor, which allows
weighted average to be shown. Moreover, for rate displays, a
time delay of up to 25 seconds can also be selected.

CONTROL INPUTS

The RTP has three Control Inputs, i.e. Input C, Input D and Input E
(Only C & D with RS485 option). Each input can be configured to
start/stop each counter or reset each counter and Control Output.
These inputs can also perform different control actions like printing
on serial port, lock unit and freeze display.

RESET OPTIONS

The entire unit, i.e. all counters and control outputs, or Counter A,
Counter B, Counter A+B, Counter A-B, Control O/P A and Control
O/P B can be individually programmed to be reset on pressing the
front panel RST key and also by a positive edge signal to any of
the Control I/Ps C, D and E.

SERIAL COMMUNICATION

The serial strobed port can be used for serial printing of Total or
Rate data with descriptors. The unit can also communicate with
a master device through a Modbus-RTU protocol. The data given
for each parameter is in IEEE float format comprising of 2 words.
The unit can be connected in a network. Order Option 1 is RS-232
level format; Order Option 2 is RS-422/485 level format.

CONTROL OUTPUTS

The RTP has the following Control Outputs:
RELAY / O.C.: 2 N.O. relays of 5 A and 250 V OR
2 Open Collector Outputs;
100 mA maximum.

Kessler-Ellis Products • 800-631-2165 F-16 • Flow Instruments • Page 65

PROG

VIEW

PRE A

LOCK

RST

PRE B

CLR

ENT

ANALOG OUTPUT

12345

6789

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

12345

6789

17 18

Type: 4-20 mA output.
Accuracy: ± 50µA worst case.
This Analog O/P can be programmed to track any parameter.
Reverse tracking O/P is also available.
PRESETS The unit supports five counters, i.e. Counter A, Counter
B, Counter A+B, Counter A-B and Grand Total. The counters can
either be reset to zero or disabled. Relays can be activated by any
of the Total or Rate values. If a Total preset activates the relay,
the user can select an output duration of 0.1 to 99.9 seconds with
instant auto reset to “0”. A 00.0 duration keeps the relay activated
until externally reset. If both presets are assigned to same counter,
with Relay A duration set to 00.0 and Preset A lower than Preset B,

Relay A pulls in at Preset A and drops out when Preset B (having
a duration other than 00.0) pulls in. Counter recycles immediately,
and Relay B stays activated for the selected duration.
If activated by rate, the relay pulls in at High Preset or above and
remains on until rate falls below Low Preset.

LOCKOUT The unit program and presets can be protected with a
lock code to prevent unauthorized front panel changes. This code
can be assigned with a maximum of 4 digits and is user selectable.
It can be entered through front panel LOCK key or by configuring
any of the Control I/Ps to “Lock unit”. Alternate entry of the lock
code or pulses to that I/P will lock or unlock the unit.

Flow Instruments

RATEMETERS/TOTALIZERS

Terminal Designations:

AC Power

1 • AC1 100 TO 260 VAC
2 • AC2 100 TO 260 VAC
3 • RELAY A (N.O.)
4 • COMMON
5 • RELAY A (N.C.)
6 • RELAY B (N.O.)
7 • COMMON
8 • RELAY B (N.C.)
9 • (+) 20VDC OUT (50mA)
10 • (–) 20VDC OUT (50mA)
11 • ANALOG O/P (+)
12 • ANALOG O/P (–)
13 • CTRL I/P E
14 • CTRL I/P D
15 • CTRL I/P C
16 • PULSE I/P B
17 • PULSE I/P A
18 • INPUT GND

1.7” (45mm)

2.17” (55mm)

4.05” (103mm)

3.62” (92mm)

RS-232 Port

DC Power

1 • + DC INPUT (24VDC ± 10%)
2 • – DC INPUT (24VDC ± 10%)
3 • RELAY A (N.O.)
4 • COMMON
5 • RELAY A (N.C.)
6 • RELAY B (N.O.)
7 • COMMON
8 • RELAY B (N.C.)
9 • (+) 20VDC OUT (50mA)
10 • (–) 20VDC OUT (50mA)
11 • ANALOG O/P (+)
12 • ANALOG O/P (–)
13 • CTRL I/P E
14 • CTRL I/P D
15 • CTRL I/P C
16 • PULSE I/P B
17 • PULSE I/P A
18 • INPUT GND

Bezel

Gasket

3.82” (97mm)

Panel

Communication Port Terminal Designations:

RS-232 Port:
(DB9 Female)

6 - NC
7 - CMOS TXD
8 - TX
9 - RX

RS-485 Port:
(DB9 Female)

1 - TX+
2 - TXD
3 - RXD
4 - RX+
5 - GND

KEYPAD FUNCTIONS

KEY

Run Mode

Program Mode

Ordering Information

Example: RTP A 3 1
Series:
RTP= Pulse Input Ratemeter/Totalizer

Enter The Programming
Mode

VIEW key scrolls through the
selected viewing parameters

Toggles between menus

Left key shifts digits in
number entry/characters in
message mode

Operating Voltage:
A= 110 VAC ± 15%
B= 220 VAC ± 15%

*C= 24 VDC

Input:
3= Standard, 4-30 VDC simultaneous inputs
Options:
1= RS-232, 3 Control Inputs (not available with RS-485)
*2= RS-485, 2 Control Inputs (not available with RS-232)
A= 4-20 mA Out (Can be ordered with options 1 or 2)

* Special Order
Accessories

NEMA 4X wall mount enclosure available, see NEMA-1/8DIN
XHV 7/4 Explosion Proof Housing available, see XHV7/4
Serial printer available, see P1000, P295
Ethernet Port Server available, see IEPS
RS-422/485 to RS-232 Communication Adaptor available, see CA285

Page 66 • Flow Instruments • F-16 Kessler-Ellis Products • 800-631-2165

PRE A key allows Preset A
to be changed if unit is not
locked

PRE B key allows Preset B
to be changed if unit is not
locked

Lock Key allows the entry
of a lock code to lock/unlock
the unit

RST Key resets counters
(with/without confirmation

Up key increments digits/
characters

CLR key clears the numeric
field

ENT key saves changes and
steps to next menu

Unit comes out of
programming at any level