2 sensor connector – INFICON Composer Gas Concentration Controller User Manual

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Composer Operating Manual

4.3.6.2 SENSOR Connector

A DB-15 connector used for connecting the Controller to the Transducer. There
are no user connections on this connector.

IN#1

SET reference zero

Sets a new value of
Reference Zero—will not
take action unless: (a) steady
condition is met (see K4
above), (b) the Transducer is
at temperature set point, and
(c) a zero value for the MIN
FLOW parameter has been
set.

IN#2 ** HOLD CONTROL OUTput 19

Holds CONTROL OUTput at
present voltage value **

IN#3 ** STOP CONTROL OUTput 20

Sets CONTROL OUTput to
zero volts**

IN#4 ** START CONTROL

OUTput

Initiates feedback control to
maintain target concentration
set point (or value on
CONCENTRATION INput)**

IN#5 ** BYPASS

Initiates full flow through
dilution line (requires SW#5
of CFGR2 be set)** See

Table 4-5 on page 4-26

IN#6

spare 1

IN#7

spare 2

GND

system chassis ground

13, 14,
15, 16, 17

** Inputs 2, 3, 4, and 5 are mutually exclusive in Concentration Control mode.
The last command to change state from off to on will be operative. Certain
transitions are not allowed: (a) Stop to Hold, (b) Bypass to Hold. Inputs 2, 3,
and 5 are inoperative in Bulk Flow mode.

Table 4-2 System I/O Connector Function (continued)

Relay
I/O #

FUNCTION

PIN #s

Comment