Description
Each
SCM5B40 and SCM5B41 wide bandwidth voltage input module provides a
single channel of analog input which is amplified, isolated, and
converted to a high-level analog voltage output. This voltage output is
logic-switch controlled, allowing these modules to share a common analog
bus without the requirement of external multiplexers.
The SCM5B modules are designed with a completely isolated computer side
circuit which can be floated to ±50V from Power Common, pin 16. This
complete isolation means that no connection is required between I/O
Common and Power Common for proper operation of the output switch. If
desired, the output switch can be turned on continuously by simply
connecting pin 22, the Read-Enable pin, to I/O Common, pin 19.
The input signal is processed through a pre-amplifier on the field side
of the isolation barrier. This pre-amplifier has a gain-bandwidth
product of 5MHz and is bandwidth limited to 10kHz. After amplification,
the input signal is chopped by a proprietary chopper circuit. Isolation
is provided by transformer coupling, again using a proprietary technique
to suppress transmission of common mode spikes or surges. The module is
powered from +5VDC, ±5%.
A special input circuit on the SCM5B40 and SCM5B41 modules provides
protection against accidental connection of power-line voltages up to
240VAC.
Features
- Accepts Millivolt and Voltage Level Signals
- High-Level Voltage Outputs
- 1500Vrms Transformer Isolation
- ANSI/IEEE C37.90.1 Transient Protection
- Input Protected to 240VAC Continuous
- 100dB CMR
- 10kHz Signal Bandwidth
- ±0.03% Accuracy
- ±0.01% Linearity
- ±1µV/°C Drift
- CSA Certified, FM Approved, CE and ATEX Compliant
- Mix and Match SCM5B Types on Backpanel