Measurement Computing WaveBook rev.4.0 - Manual (Page 54)

4-8 WaveBook Operation Reference 06-08-01 WaveBook User’s Manual
Digital I/O Connections for WaveBook/516 (16-bit mode*)
With the WaveBook/516 series, the following signals are present on the DB25F high-speed digital I/O
connector.
•
16 High-Speed Digital I/O Lines (D0 through D15)
•
TTL Trigger Input (TTLTRG)
•
+15 V (pin 23), -15 V (pin 22), 50 mA max. (each)
•
two +5 V (pin 19 and pin 21), 250 mA max. (total)
•
External Clock (pin 20)
•
two Digital Grounds (pins 24 and 25)
To sample just 16 digital input signals, connect them directly to the digital I/O data lines.
D15 is the most significant bit, and D0 is the least.
*Note: For 8-bit mode, refer to the WaveBook/512 pinout,
with noted exception that in WaveBook/516 applications
pin 20 is for an external clock.
The following figure depicts WaveBook/516’s Front Panel, showing the DB25 connector and cable for
External Clock and TTL External Trigger.
Digital I/O Connections, WaveBook/516
D0 – D15 High Speed Digital I/O data lines
TTLTRG TTL trigger input
External Clock 16 bit mode, read/write strobe
+5 VDC 250 mA maximum
+15,-15 VDC 50 mA maximum (each)
WaveBook/516, DB25 Pinout
Digital Grounds Pins 24 and25
WaveBook/516 with Optional Clock and External Trigger Cable (CA-178)