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2.7 Module S2
The S2 module provides an isolated RS-232 ASCII communi-
cations port, to install in large format industrial meters from
Series B.
The S2 module implements a MASTER / SLAVE protocol, with
up to 31 addressable slaves, with 'daisy-chain' connection.
In SLAVE mode allows access to reading values, alarm status,
memory of maximum and minimum, ...
Configuration is performed from the front keypad of the in-
strument, by accessing the menu entries 'Opt.1', 'Opt.2' or
'Opt.3', according to the slot where the module is installed.
Modules S2 can be provided factory installed into a Series
B instrument, or standalone for delayed installation. No sol-
dering or special configuration is required. See section 1.6 on
how to install output and control modules.
Figure 24 - Communications module Module 'S2'
Protocol
ASCII
Bus
RS-232, up to 57.6 Kbps
Isolation
1000 Vdc
Terminal
plug-in screw clamp, pitch 5.08 mm
Installation allowed at slot 1, slot 2, slot 3
Rx2
Tx2
A
'Daisy chain' Tx data transmission
B
'Daisy chain' Rx data reception
C
Tx data transmission
D
Rx data reception
E
GND
Figure 25 - Connections for RS-232 'S2' communications module
For more information:
http://fema.es/docs/4326_SERIES-B_OPTIONS_manual_i.pdf
Tx1
Rx1
GND
A
B
C
D
E
Module S2
FEMA ELECTRÓNICA . SERIES B . Models Bxx-C1
33
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