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Signal Processor
2.2.3 Output (Retransmission output) connection schedule
The output (retransmission output) connection schedule for System 4
thermometers is given in Fig. 9a and the output (retransmission output)
connection schedule for the GST thermometer is given in Fig. 9b.
The processor is supplied fitted for 'up scale' operation. The mode of
operation is set by means of a link on the input/output (I/O) board. To gain
access to the link, the back panel of the processor must be removed.
(i)
Refer to Fig. 10, unscrew the four screws (A) on the back panel of
the processor.
(ii)
Slide the I/O board out of the rear of the processor. The location of the
'up scale/down scale' selector link is shown in Fig. 11.
(iii) Set the link to the required mode of operation.
(iv) Slide the I/O board into it's slot in the processor.
(v)
Tighten the four screws (A) on the back panel of the processor
(Refer to Fig. 10).
Output (Retransmission output)
Pin Nº
Fig. 9a - System 4 thermometer retransmission output
Page 14
Function
Description
1
I +
Current output drive
2
I -
Current output return
3
Screen
Screen
4
V +
Voltage output drive
5
V -
Voltage output return
cable connection schedule
Load
Maximum loop
resistance: 500Ω
Minimum load
resistance: 10kΩ
(Not available on GST I/O
cards)
LMG GS
User Guide
238009a
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