OPT-SNAP-AILC-2

SNAP-AILC-2 SNAP Load Cell Input Module, 10 VDC Excitation, 3 or 4 mV/V Input Sensitivity

The SNAP-AILC-2 input module works with 3 mV/V and 4 mV/V load cells as a load cell front end. Using a separate 24
VDC power source (purchased separately), the module provides isolated 10 VDC bridge excitation for up to four 350 ohm
or 415 ohm load cells.
 
The SNAP-AILC-2 is primarily used with high-quality 4 mV/V load cells to gather data from force measurement testing.
 
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.
 
NOTE: In addtion to SNAP PAC brains and R-series controllers, this module also works with the following legacy brains, if
they have firmware version R6.1c or newer: SNAP-B3000-ENET, SNAP-ENET-S64, SNAP-UP1-ADS, and SNAP-UP1-M64.
 

Input Range Sensitivity:   SNAP-AILC   SNAP-AILC-2	2 mV/V or 3 mV/V (Over range ± 2.2 mV or ± 3.3 mV) 3 mV/V or 4 mV/V (Over range ± 3.3 mV or ± 4.4 mV)
Input Resistance	100 Megohms differential
Resolution: Analog Scale Points	>22 bits + sign (± 6,400,000 counts = ± 100% of scale)
Response Time, Data Freshness	See the following table
DC Reversal (Input)	0.015% (±1000 counts of reading @ 6,400,000 F.S.)
DC Common Mode Rejection	>-120 dB
AC Common Mode Rejection	>-120 dB at 60 Hz
Maximum Survivable Input	± 15 volts across module load cell connector
Maximum Operating Common Mode Voltage	250 V
Accuracy (% Full Scale):   Offset   Gain	± 0.05% (= 3,200 counts out of 6,400,000, out of box) ± 0.05% (= 3,200 counts out of 6,400,000, out of box)
Usable Resolution at Default Configuration (Fast)	38 nV - sign and 19 bits (±524,288 counts @ channel 2) At filter weight 64, settles to 99.9% of final reading in 3.9 s.
DRIFT:   Gain   Offset	40 PPM / °C 10 PPM / °C
Isolation: Optical	4000 V
Isolation: Transformer	1500 V
Rack Power Requirements	5.00 VDC to 5.20 VDC @ 120 mA
24V Bridge Supply:   Input Voltage   Input Current   Output Fault Current	24 VDC nominal (22 V min. to 30 V max.) 40 mA for one load cell or 115 mA for four load cells 124 mA typical (field fault—shorted bridge)
Ambient Temperature:   Operating   Storage	0 to 70 °C -25 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	CE, RoHS, DFARS
Warranty	Lifetime

Rev: 04/13