KEYENCE LS-3100/3100W Series - Manual (Page 76)

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When EXT TRIG IN is pulled low with ETE IN pulled low, the measured value
is output after a max. of 20 ms (MOVE averaging, number of measurements
for averaging: 16 to 1,024), or a max. of "2.5 ms x number of measurements
for averaging" (SIMPLE averaging). The output value is retained until
EXT TRIG IN is pulled low again. External Trigger Input
(EXT TRIG IN)
6-2. GP-IB Interface I/O
Specifications The GP-IB I/O interface conforms to IEEE (Institute of Electrical and Elec-
tronics Engineers) standard 488-1978.
Transmission code
Logic level
Number of connectable devices
Total cable length
Cable length between 2 devices
ASCII
15 max. (including controller)
20 m max.*
4 m max.
* Varies according to the number of interconnected devices.
Pin Assignment
Pin No. Signal Function
1 DIO1 Data bus
2 DIO2 Data bus
3 DIO3 Data bus
4 DIO4 Data bus
5 EOI Indicates that the data transmission is
completed.
6 DAV Indicates that the data is valid.
7 NRFD Indicates that the data reception is impossible.
8 NDAC Indicates that the data reception is not
completed.
9 IFC Initializes the interface.
10 SRQ Allows devices on the line to request interrupt to
the controller.
11 ATN Determines whether the data is interface
message or device message.
12 Shield Shield
13 DIO5 Data bus
14 DIO6 Data bus
15 DIO7 Data bus
16 DIO8 Data bus
CHAPTER 6 Optional Interface Boards
Logic 0 (HIGH state): +2.4 V min.
Logic 1 (LOW state): +0.4 V max.
(Bidirectional transceiver is used.)
(To be continued)
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