100/180 mm PAPERLESS GRAPHIC RECORDER: USER GUIDE
HA028910
Issue 13 Sep 16
User Guide
Page 364
14 REMOTE CJ BLOCK OPTION
14.1 LARGE FRAME RECORDER WITH INTEGRAL CJC BLOCK
14.1.1 Introduction
This option allows up to 30 thermocouples of any type(s) to be connected to the recorder using mini-
ature compensating connectors mounted on the rear terminal cover. Thermocouples may be connected
directly, or using extension compensating cable.
Each row of fi ve sockets has an associated aluminium bar, to which is bonded a resistance temperature detec-
tor (RTD) which acts as a cold junctions sensor, connected to the sixth channel of the relevant input board.
For this reason, connector numbers 6 to 30 do not match the input channel numbering, but the recorder
confi guration names the channels in an unambiguous way, to reduce confusion. Table 14.1.1 gives details.
Table 14.1.1 Connector/channel cross reference
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
Connector 16 - Channel 19
Connector 17 - Channel 20
Connector 18 - Channel 21
Connector 19 - Channel 22
Connector 20 - Channel 23
Connector 21 - Channel 25
Connector 22 - Channel 26
Connector 23 - Channel 27
Connector 24 - Channel 28
Connector 25 - Channel 29
Connector 26 - Channel 31
Connector 27 - Channel 32
Connector 28 - Channel 33
Connector 29 - Channel 33
Connector 30 - Channel 35
14.1.2 Wiring
SIGNAL WIRING
Caution
Thermocouples must not be attached to voltages greater than 24V,
Signal wiring consists of connecting the transducer wires into the correct type of plug (fi gure 14.1.2a) and
inserting the plugs into the relevant sockets at the rear of the recorder.
Figure 14.1.2b shows the arrangement of the connectors at the rear panel, and Figure 14.1.2c shows the
wiring between the portable case rear panel and the recorder.
Figure 14.1.2a Connector detail (typical)
+ wire