Elster S1 Operating Instructions

12/13
Elster GmbH
Steinernstr. 19-21
D-55252 Mainz-Kastel
Germany
© Elster GmbH, December 2013 Subject to technical modification
Elster-Instromet
Tel. +49 (0) 61 34 605-0
Fax +49 (0) 61 34 605-390
www.elster-instromet.com
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Elster GmbH
Steinernstr. 19-21
D-55252 Mainz-Kastel
Germany
Operating instructions
ID no. 73018612d
Absolute ENCODER S1, S1D
This product has been designed as:
1. a main index for gas meters; all other operating instructions shall continue to remain in force;
2. a top unit (transducer device) for gas meters equipped with a mechanical index drive (only
available as Encoder S1, S1D index).
The encoder is suitable for connection to a downstream add-on device (e.g. volume conversion
device, data logger or bus system) in explosive atmospheres (see table). For that purpose, a device
connected to the terminal box must have at least the following approval as associated apparatus:
[EEx ia IIC] for the model equipped with a Namur interface
[EEx ib IIC] for the model equipped with an SCR/SCR+ interface
(the M-Bus version is not ATEX approved)
and must meet the following limits:
I max. 20 mA
k
U max. 13.5 V
o
P (I * U ) max. 270 mW
max
k o
Encoder technical data
Encoder S1
Single index
Number of digit rollers
Temperature range
Protection class
Interfaces
ATEX approval
Meter types TRZ, Q, RVG, RABO, SMRI, IRM
optional or retrofittable: all IN-Sxx versions, IN-W11
LF pulse generator
ENCODER add-on index – additional information
Torque
Max. no. of revolutions of the
mechanical power take-off
Mechanical power take-off
Power take-off value 0.1
Decimals 2
© Elster GmbH, December 2013 Subject to technical modification
Encoder S1D
Double index
8
-20 °C to +60 °C
IP 67
NAMUR (II 2 G EEx ia IIC T4)
SCR/SCR+ (II 2 G EEx ib IIB T4)
M-Bus
RVG, RABO, IRM
U = 24 V, I = 50 mA, P = 0.25 VA,
i i i
R = 100 Ω (series resistor)
i
0.2 Nmm
1 Hz
pursuant to EN 12261
1 10
1 0
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