HRI-Mei
www.sensus.com
info.int@xylem.com
MS 8400 INT4 /
04-2021
•
0009
Installation
Just before mounting the HRI-Mei on the meter
it is essential to remove the aluminium foil at the
bottom side!
Installation (see image
1
)
1. Open the cover for OD with slight pressure
against the left side.
2. Turn blue ring counterclockwise against stop
(ca. 10°); pulse sensor slots are open.
3. Insert the two hooks of the HRI-Mei diagonally
from above into the holes of the backfitting ring.
4. Push HRI-Mei down until it is fixed on the
backfitting ring.
5. Turn blue ring clockwise against stop (ca. 10°);
pulse sensor slots are barred.
6. Close cover for OD. If required the HRI-Mei can
be protected with a seal wire against removal.
7. Release the round cover from the hinge and
replace it with the supplied semicircular cover.
Type
HRI-Mei provides 7 different pulse modes each with
the following pulse weights
D = 10 / 50 / 100 / 250 / 500 or 1000 litres/pulse
Pulse length T= 32, 128 or 500 ms (not with B5, B6)
Pulse
mode
Wire
l1 (white)
l2 (yellow)
B1
Balanced pulses** Tamper = closed
B2
Forward pulses
Backward pulses
B3
Forwards and
backwards pulses
Direction signal
forward = open
B4
Balanced pulses** Tamper = open
B5
NAMUR with for-
ward / backward
signal
Not used
B6
NAMUR with
suppressing back-
ward flow
(“OD-AM”)
Not used
B7
Balanced pulses
Balanced pulses
Ground (grey)
**)
Balanced pulses: Reverse volume must be
compensated by identical forward volume before
more pulses are output. That means, no output
pulses during this period even though the meter
register is counting forward.
DATA (green/brown) Also used for external power
supply
Battery or external supply
Battery: 3.6V Lithium. Integral battery, not
replaceable.
Durability
• 20 °C medium temperature: up to 12 years
• 12hrs 20 °C / 12 hrs 60 °C: up to 10 years
With a continuous external power supply of 10 V
DC (max. 42 V DC) the durability increases to more
than 15 years. In case of a voltage breakdown
the battery of the module takes over the power
supply. Therefore the stored values are not lost
and the module continues the volume detection
autonomously. The external supply can also be
provided via an M-Bus system.
Technical Data
• Environmental temperature range:
-10 °C ... +60 °C
• Cable length: 3 m
• Protection class IP 68
• EMC acc. EC98/34 (EN 61000-6-2 and EN 61000-
6-3)
Output pulses (I1/I2) for Mode B1 to B4 and B7
Open Collector pulse output module acc. ISO/TC30
Maximum voltage: 48 V DC / Imax: 200mA/ Pmax:
4 W
Maximum residual voltage (output interconnected,
-20 °C / +60 °C): 0,45 V@ 5 μA/ 0,55 V @5 mA/ 1,4 V
@200 mA
Pulse width (32, 128 or 500 ms) adjustable
Flow direction in Mode B3: Signal I2 is active low =
200 μs prior to first pulse in reverse direction.
Acceptable cable extension: depending on cable
type and connected devices; several kilometres
possible.
Transient voltage protection is highly recommended
for wiring outside buildings.
Output pulses (I1) for Mode B5 and B6 (NAMUR-
compatible)
Acc. EN 60947-5-6 with constant pulse width from
6ms resp. 7ms.
Transient voltage protection is highly recommended
for wiring outside buildings.
Data interface
M-Bus and MiniBus (Auto speed detection: 300 /
2400 Baud)
Protocol acc. EN13757-3 conforms IEC 870 / EN 1434
The data interface is NOT galvanically isolated
from the grey connection lead, see connection
diagram
2
. This is to be considered when used
simultaneously.
Data: Meter number and counter reading, monthly
meter readings, min./max. flow rate and backflow
with date and time, etc.
Tamper and alarm settings (s.a. MiniCom)
Cable extension: acc. M-Bus specification.
The quantity/number of readouts with M-Bus is
unlimited. If MiniBus is used, do not readout more
than hourly so that the battery life of 12 years is
maintained.
With the data interface the following values can
be adjusted with the help of the MiniCom software
(Version > 3.6.40). (Default settings in brackets):
• Primary address (0)
• Secondary address (Fab.no. of HRI-Mei)
• Meter no. (Fab.no. of HRI-Mei)
• Counter reading (0); when the aluminum foil is
missing the counter reading can be <> 0.
• Day of month for monthly value storage (1).
• Operator password = 00000001
• Pulse mode, pulse value, pulse duration
(depending on order)
Further settings s.a. MiniCom
Reading with the MiniReader (182080) is supported
from firmware version >2.0.
If the HRI-Mei is ordered as a version mounted on
a meter, the secondary address, meter number and
the meter reading are pre-set with the ones from the
mounted meter ex works.
The pulse value and the pulse period are set
according to the order. An adjustment on-site is
then not required.
When using M-Bus with separate delivered HRI-Mei,
after mounting at a meter, the programming of the
input pulse value and the alignment of the volume
index has to be done.
Disposal
This product contains a lithium
battery. In the interest of protecting
the environment, this battery may
not be disposed in household
waste after its period of use. The
local and national regulations for
environmental protection are to be
considered.
INSTALLATION AND OPERATING INSTRUCTIONS – HRI-Mei Bx
Data (green)
Data (brown)
Pulses l1 (white)
Pulses l2 (yellow)
Ground (grey)
1
Application examples
All connections with external power supply are optional. The
HRI-Mei’s internal battery can also be used.
PLC with switched ground
HRI-Mei with external power supply
This application can be also used as a test tool
for all HRI types
PLC with switched power supply
Flow
Mode B1/4
Mode B2
Mode B3
open
open
open
open
open
close
close
close
close
close
forward
meter index
backwards
forward
forward
backward
EN DE FR ES
reverse
forward
white
white
white
yellow
green
grey
grey
green
e. g. Rx = 1 KOhm l = Ui/(Rx+Ri) = <200 mA
grey
Input
l1 balanced
l1 forward
l2 backwards
l1 forward & backwards
l2 Direction
2
HRI-Mei
B3
