Allen-Bradley POINT I/O 1734-VHSC24, User Manual, Page: 55 / 64

1 Publication 1734-UM003A-EN-P - August 2000
Appendix
A
Specifications
Specifications for the Very
High Speed Counter
Module, cat. no.
1734-VHSC24
Specifications - 1734-VHSC24 Very High Speed Counter Module
Input Specifications
Number of Inputs 1 - 1 group of A/Areturn, B/Breturn and Z/Zreturn
Input Voltage 15-24V dc
Input Current 6.1mA @ 15V dc
10.2mA @ 24V dc
Input OFF-State Current <0.250mA max
Input OFF-State Voltage <1.8V dc
Input ON-State Current >5mA
Input ON-State Voltage >12.5V dc
Maximum ON-State Voltage Refer to derating curve below.
Input Filter Selections Off
10
µ
s
100
µ
s
1.0ms
10.0ms
Maximum Input Frequency 1.0MHz counter and encoder X1 configurations
500kHz encoder X2 configuration (no filter)
250kHz encoder X4 configuration (no filter)
Output Specifications
Number of Outputs 1 isolated group of 2 capable of 0.5A @ 24V dc
Output Control Outputs can be tied to any of 4 compare windows
Output Supply Voltage Range 10-28.8V dc
OFF-State Leakage Current <0.5mA
ON-State Voltage Drop <0.3V dc @ 0.5A
ON-State Current 0.5A maximum
Short Circuit Current 6A - Outputs are short circuit protected and either
cycle until the fault is corrected, or latch off
(depending upon programming)
Short circuit detected when output is turned on.
Open Wire Detection Open wire detected when output is turned off
Delay Time
OFF to ON
ON to OFF 25
µ
s (load dependent)
150
µ
s (load dependent)