Scanivalve DSA 3000 Series, Инструкция по эксплуатации и обслуживанию

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EXTERNAL TRIGGER REQUIREMENTS
The Digital Sensor Array scan functions may be synchronized with other data acquisition devices by using
the external trigger.
DSA 3017/3018 Modules
The 3000 Series Modules may be triggered by a hardware trigger. The external trigger input is
optically isolated to prevent grounding problems. It is a CMOS level, edge sensing device. It
requires a minimum signal of 9Vdc @ 6.5 mA. It may accept voltages as high as 15 Vdc. The
external trigger will only be active if XSCANTRIG is set to 1. When a SCAN command is issued by
the Client/host, the module enters the SCAN mode and waits for a trigger. The module will return
an averaged frame of data for each trigger pulse received. This will continue until the
Frames_per_Scan variable value is met, or until a STOP command is issued.
DSA 3217/3218 Modules
The 3200 Series modules may be triggered by a hardware or software trigger.
Hardware Trigger
The external trigger input is optically isolated to prevent grounding problems. It is a TTL
level, edge sensing device. It requires a minimum signal of 9Vdc @ 6.5 mA. It may accept
voltages as high as 15 Vdc. The external trigger will only be active if XSCANTRIG is set to
1. When a SCAN command is issued by the Client/host, the module enters the SCAN mode
and waits for a trigger. The module will return an averaged frame of data for each trigger
pulse received. This will continue until the Frames_per_Scan variable value is met, or until
a STOP command is issued.
Software Trigger
The software trigger will only be active if XSCANTRIG is set to 1. When a SCAN command
is issued by the Client/host, the module will enter the SCAN mode and wait for a trigger. An
averaged frame of data will be output as soon as the TRIG command or a <TAB> character
(9 HEX or Control I) is received. Data will be output with each successive trigger command.
This will continue until the Frames_per_Scan variable value is met, or until a STOP
command is issued.
DSA 3017/3018 Modules Serial Number 180 and higher and all DSA 3217/3218 modules use a 6 pin
connector for a combination Trigger and Serial Communications Interface. The wiring of the trigger input
connector for both configurations is shown in figure 8.
Figure 8 - Trigger wiring
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