Counting unit

C9945-14

The C9945-14 is counting unit with a USB interface and can be used as 16 ch photon counter. This unit uses the double-counter method that has two counter circuits to allow measurements with no dead time. C9945-14 model has LVDS input for multichannel photon counting head.

Specifications

Parameter Description / Value
Input Number of input signals 16 ch
Signal input level LVDS
Signal pulse width 5 ns or longer
Input impedance 100 Ω
Counter Counter method Double counter method
Max. count rate 100 MHz
Max. counter capacity 228 counts / counter gate (*1)
Internal counter gate time 500 ns to 1 s (1, 2, 5 step) (*2)
Trigger Trigger method Software trigger / External start trigger
External start trigger signal input level TTL
I/O Number of output 2
Output level TTL
Number of input 2
Input level TTL
Synchronous signal input level LVTTL
ID switch 0 to 7
Buffer capacity 4096 (word) (*3)
Compatible OS Windows® 10 pro (*4)
Interface USB 2.0
Supply voltage DC 6.5 V to 8.0 V / 0.5 A
Operating ambient temperature / Humidity +5 ℃ to +45 ℃ / 80 % or less (No condensation)
Storage temperature / Humidity 0 ℃ to +50 ℃ / 85 % or less (No condensation)
AC adapter AC input AC 100 V to 240 V
Output +7 V / 1.6 A

Notes
*1 Possible to select bit numbers 28, 16, 8, 4 for count / counter gate.
*2 When transferring data continuously, internal counter gate time depends on transfer speed of USB 2.0 and counter capacity.
*3 1 (word) = 2 (byte) = 16 (bit)
*4 Power save mode of a personal computer should be turned off.
* CD-ROM (Software), AC adapter & USB 2.0 cable are supplied.

Block diagram

Dimensional outline (Unit: mm)

Connection example

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