8
Quad pH/mV Amp
I
2
C Connector
The back panel,
Figure 2–2
, has two DB-9 pin ‘I
2
C bus’ connectors
labelled Input and Output. The Input connector enables connection to
the
e-corder
(or to the output of other eDAQ Amps). This connection
provides power to the Quad pH/mV Amp and carries the various
control signals (for gain range and filter selection) to and from the
e-corder
. The pin assignments are shown in
Figure 2–3
.
Connecting to the e-corder
Your Quad pH/mV Amp will have been supplied with an I
2
C cable
(DB-9 pin connectors at either end), and four cables with BNC
connectors at either end.
Output
Made in Australia by eDAQ Pty Ltd.
No user serviceable parts inside.
Refer servicing to qualified service personnel.
Input
Channel 4
Channel 3
Channel 2
Channel 1
Made in Australia by eDAQ Pty Ltd.
No user serviceable parts inside.
2
I C Bus
Rated Voltage: 90 - 250 V AC
Refer servicing to qualified service personnel.
50/60 Hz 25 VA
Output
Input 1
Input 3
Input 2
Input 4
Trigger
Power
Status
401
Output
E/2
E/2
E/2
E/2
Ref
Ref
Ref
Ref
Channel 1
Channel 2
Channel 3
Channel 4
168
On-line
On-line
On-line
On-line
isolated
Figure 2–4
Four combination
electrodes shown
connected to a Quad
pH/mV Amp and
e-corder 401
Figure 2–5
Back view of Quad
pH/mV Amp connected
to e-corder
Summary of Contents for EA168
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