June 11, 2015, 715004752 Rev. A
Page 32
The signal connections necessary for your detector depend on the signal connections
available on the other instruments in the HPLC system.
2.6.1 Connecting I/O cables
The rear panel includes two removable connectors that hold the pins for the I/O
signals, as shown in the figure below. These connectors are keyed so that you can
insert them one way only.
Figure 2–4:
I/O signal inputs and outputs
2.6.1.1
I/O signals
The table below describes each of the signals available on the I/O connectors. See
for details on the electrical specifications for the signals.
Table 2–2:
I/O signals for the detector
Signal
Description
Inject Start
1
TTL contact closure. Configurable input to initiate
sequencing of time-programmed events. Defines the
start of a run (typically an injection) and resets and
starts the run-time clock to 0.00 minutes. Initial
conditions apply immediately.
Lamp On/Off
1
Configurable input to allow an external device to turn
the deuterium lamp off and on.
Chart-mark
1
Configurable input to add a chart-mark (at 10% of full
scale) to either or both analog output channels.
Autozero
1
Configurable input to autozero either or both
channels.
Analog 1
2
2-V full-scale analog output signal of channel A
(scaled to the current AU setting).
1
2
3
4
5
6
7
8
9
10
Analog 1
+
Analog 1
−
Ground
Analog 2
+
Analog 2
−
Switch 1
Switch 1
Ground
Switch 2
Switch 2
Connector I
1
2
3
4
5
6
7
8
9
10
Inject Start
+
Inject Start
−
Ground
Lamp On
+
Lamp On
−
Chart-mark
+
Chart-mark
−
Ground
Auto Zero
+
Auto Zero
−
Connector II
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