100/180 mm PAPERLESS GRAPHIC RECORDER: USER GUIDE
HA028910
Issue 13 Sep 16
User Guide
Page 371
14.3 SMALL FRAME RECORDER
14.3.1 Introduction
This option allows up to 15 thermocouples of any type(s) to be connected to the recorder using miniature
compensating connectors at a DIN rail mounted Remote CJ connector unit, with copper wire connec-
tions from this unit to the recorder input boards.. Thermocouples may be connected to the Remote CJ
unit directly, or by using extension compensating cable.
Each row of fi ve sockets has an associated aluminium bar, to which is bonded a resistance temperature
detector (RTD) which acts as a cold junctions sensor, connected to the sixth channel of each of the three
input boards. For this reason, connector numbers 6 to 15 do not match the input channel numbering,
but the recorder confi guration names the channels in an unambiguous way, to reduce confusion. Table
14.3.1 gives details.
Table 14.3.1 Connector/channel cross reference
14.3.2 Signal wiring
Caution
Thermocouples must not be attached to voltages greater than 24V,
SIGNAL WIRING
Signal wiring consists of
1. connecting the transducer wires into the correct type of plug (fi gure 14.3.2a), and inserting the plugs
into the relevant sockets in the remote CJ unit.
2 Connecting the Remote CJ unit to the recorder input board terminals..
Figure 14.3.2b shows the arrangement of the connectors at the remote CJ unit, and the recorder; fi gure
14.3.2c shows the wiring between the remote CJ unit and the recorder.
Connector 1 - Channel 1
Connector 2 - Channel 2
Connector 3 - Channel 3
Connector 4 - Channel 4
Connector 5 - Channel 5
Connector 6 - Channel 7
Connector 7 - Channel 8
Connector 8 - Channel 9
Connector 9 - Channel 10
Connector 10 - Channel 11
Connector 11 - Channel 13
Connector 12 - Channel 14
Connector 13 - Channel 15
Connector 14 - Channel 16
Connector 15 - Channel 17
Figure 14.2.2a Connector detail (typical)
+ wire