Brainboxes AD-945, Supplementary Manual

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Reference Analog Terminal Board
Calibrating The Cold Junction.
The cold junction compensation circuit can be calibrated simply
in the following manner. Place a precision voltmeter across the
W1 and W2 jumper pins. Adjust potentiometer R23 with a screw
driver so that the voltmeter reads 0.5mV times the ambient
temperature. Thus if the room temperature is 20 degree C, R23
should be adjusted till the voltmeter reads 10mVolts.
Figure 1-6. ATB J1 Pin Outs. _________________________
Signal PIN
ÚÄÄÄÄÄ¿
PIN Signal
AD Ch 0 1
³
1 2
ý³
2 AD Ch 8 (Ch0 Return)
AD Ch 1 3
³
3 4
ý³
4 AD Ch 9 (Ch1 Return)
AD Ch 2 5
³
5 6
ý³
6 AD Ch 10 (Ch2 Retn)
AD Ch 3 7
³
7 8
ý³
8 AD Ch 11 (Ch3 Retn)
AD Ch 4 9
³
O O
ý³
10 AD Ch 12 (Ch4 Retn)
AD Ch 5 11
³
O O
ý³
12 AD Ch 13 (Ch5 Retn)
AD Ch 6 13
³
O O
ý³
14 AD Ch 14 (Ch6 Retn)
AD Ch 7 15
³
O O
ý³
16 AD Ch 15 (Ch7 Retn)
Analogue Gnd 17
³
O O
ý³
18 Amp Low
-------------------------------------------------------------
+12Volts Out
19
³
O O
ý³
20 -12Volts Out
-------------------------------------------------------------
Power Ground
21
³
O O
ý³
22 DAC0 Output
DAC0 Ground 23
³
O O
ý³
24 DAC1 Output
DAC1 Ground 25
³
O O
ý³
26 Digital Ground
------------------------------------------------------------
Digital Gnd
27
³
O O
ý³
28 Dig Input 0
Dig Input 1 29
³
O O
ý³
30 Dig Input 2
Dig Input 3 31
³
O O
ý³
32 Dig Ground
Dig Input 4 33
³
O O
ý³
34 Dig In 5 / 8254 CLK0
8254 GATE0/ Dig In 6 35
³
O O
ý³
36 Dig In 7 / 8254 OUT0
Digital Gnd 37
³
O O
ý³
38 Dig Output 0
Dig Output 1 39
³
O O
ý³
40 Dig Output 2
Dig Output 3 41
³
O O
ý³
42 Dig Ground
Dig Output 4 43
³
O O
ý³
44 Dig Output 5
Dig Output 6 45
³
O O
ý³
46 Dig Output 7
Digital Gnd 47
³
O O
ý³
48 Dig Ground
------------------------------------------------------------
External Trigger
³
49 50
³
50 External Clock Input
Input
ÀÄÄÄÄÄÙ
Note:- Factory fitted resistor R19, 250 Ohms, connects J1 pin 18
AMPLOW to the ATB terminal block labelled AMPLOW.
Note:- Factory fitted resistor R17, 250 Ohms, connects J1 pin 17
to the ATB terminal block labelled ANALOG GND.
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