OPT-SNAP-AIRATE

SNAP-AIRATE SNAP 2-Ch 0-25,000 Hz Analog Rate Input Module

The SNAP-AIRATE provides two channels of frequency-to-digital conversion at 0-25,000 Hz. Nine volts through a 4.7 K
Ohm pull-up resistor are provided internally for use with devices that have open collector outputs. The module works
with TTL, CMOS, and open collector outputs and is ideally suited for use with a tachometer.
 
Part of the SNAP PAC System, the module mounts on a SNAP PAC rack with a SNAP PAC brain or rack-mounted
controller. Analog, digital, and serial I/O modules can all be on the same rack. Such an I/O unit is also well suited for
PC-based control or for use as intelligent remote I/O for an Allen-Bradley RSLogix PLC system, such as ControlLogix,
MicroLogix, or CompactLogix.
 

Nominal Input Range	0 to 25,000 Hz
Input Over-Range	To 27,500 Hz
Resolution	1 Hz
Input Response Time(% of span / delta Hz / delta time)	10.0% / 2,500 Hz / 0.1 sec 63.2% / 15.8 K Hz / 0.9 sec 99.0% / 24.75 K Hz / 4.2 sec
Data Freshness (Max)	126 ms
DC Common Mode Rejection	>-120 dB
AC Common Mode Rejection	>-120 dB at 60 Hz
Maximum Operating Common Mode Voltage	250 V
Accuracy (% full scale)	±4 Hz or ±0.5% of the input fre­quency (whichever is greater)
DRIFT: Gain Temperature Coefficient	200 ppm/ °C
DRIFT: Offset Temperature Coefficient	50 ppm/ °C
Input Coupling	Single-ended AC (capacitor coupled)
Input Amplitude Sine wave Square wave	2.5 V to 24 V p-p 0.5 V to 24 V p-p
Minimum Pulse Width	18 microseconds
Input Impedance (Inputs share the same reference point.) Pull-up Voltage Pull-up Resistor	50 K ohms AC coupled (-input to +input) 6 to 9 V 4.7 K ohms
Isolation	1500 V
Power Requirements	5 VDC (±0.15 ) at 190 mA
Operating Temperature	0 °C to 70 °C
Storage Temperature	-25 °C to 85 °C
Torque, hold-down screws	4 in-lb (0.45 N-m)
Torque, connector screws	5.26 in-lb (0.6 N-m)
Agency Approvals	UL, FM, CE, RoHS, DFARS
Warranty	Lifetime

Rev: 04/13