INFICON Composer Gas Concentration Controller - Manual (Page 118)

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Composer Operating Manual
4.3.6 Description of Rear Panel
The rear panel of the Composer is shown in Figure 4-5 . The rear panel is the
same for both front panel types.
Figure 4-5 Rear Panel of the Composer
4.3.6.1 Description and Purpose of SYSTEM I/O Connector
WARNING
The relay, relay circuit, and associated pins in the I/O
connector(s) have a maximum voltage of 30 V(dc) or
30 V(ac) RMS or 42 V(peak). The maximum current
rating per connector pin or relay contact is given
below.
CAUTION
The current rating for the contacts for K5 is less than
the current rating for the contacts K1 to K4. Please see
the information below for the correct current rating.
A DB-25 connector that contains the discrete input ports and the relay outputs
used for hardware interfacing with other system instrumentation and the main
system controller. Relays K1-K4 are SPST type with normally open contacts
rated up to 2.5 A, 30 V(dc) or 30 V(ac) RMS or 42 V(peak) max..
NOTE: K5 has slightly different electrical specifications: SPDT, 2 A @ 30 V(dc),
0.6 A @ 30 V(ac) RMS or 42 V(peak) max. K5 is a normally closed type
to insure pass through of the Bulk Flux signal when the instrument is
powered off.
CONCENTRATION
OUT OUT IN
POWER
OPTION
RS232
SYSTEM I/O
SENSOR
CONTROL
CFGR1 CFGR2