Campbell Scientific CR9000X Measurement and Control System - Manual (Page 41)

Overview
CR9051E Fault Protected 5 V Analog Input Module
FIGURE OV1-6. CR9051E with CR9050EC
The number of channels are the same as for the CR9050(E) Analog Input
Module. This module includes an Easy Connect (CR9050EC) that can quickly
be removed from the CR9000X chassis. The CR9050EC contains the PRT that
is used to provide the reference temperature for thermocouple measurements.
All inputs on the CR9050(E), CR9051E, and CR9055(E) modules are
multiplexed through the single 16 bit A/D on the CR9041 A/D module. The
maximum aggregate throughput for all channels on all modules is 100,000
samples per second. Resolution on the most sensitive range is 1.6
μV.
Full Scale Maximum
Range Resolution Throughput
± 5000 mV 158 uV 100 KHz
± 1000 mV 32 uV 100 KHz
± 200 mV 6.3 uV 50 KHz
± 50 mV 1.6 uV 50 KHz
Although the measurable voltage range with respect to data logger ground is
±5 V, the same as the CR9050, the CR9051E's input channels are fault-
protected so as to permit over-voltages between +50 V and –40 V without
corruption of measurements on other input channels.
Another difference from the CR9050(E) module is that the CR9051E's input
channels become open switches when the CR9000X is powered off.
The CR9051E supports the same instruction set as the CR9050.
See Section 3.1 Measurements using the CR9041 A/D for measurement details.
See Section 7 Measurement Instructions for Instruction details.
OV-9