Campbell Scientific CR5000 Measurement and Control Module - Manual (Page 8)

CR5000 Overview
OV-4
OV1.1.10 Control I/O
There are 8 digital Input/Output channels (0 V low, 5 V high) for frequency
measurement, digital control, and triggering.
OV1.1.11 Pulse Inputs
Two Pulse input channels can count pulses from high-level (5 V square wave),
switch closure, or low-level A/C signals.
OV1.1.12 Power Up
The CR5000 allows shutting off power under program control. The Power Up
inputs allow an external signal to awaken the CR5000 from a powered down
state (PowerOff, Section 9). When the CR5000 is in this power off state the
ON Off switch is in the on position but the CR5000 is off. If the "<0.5 " input
is switched to ground or if the ">2" input has a voltage greater than 2 volts
applied, the CR5000 will awake, load and run the “run on power-up” program.
If the "< 0.5" input continues to be held at ground while the CR5000 is
powered on and goes through its 2-5 second initialization sequence, the
CR5000 will not run “run on power-up” program.
OV1.1.13 SDM Connections
The Synchronous Device for Measurement (SDM) connections C1,C2, and C3
along with the adjacent 12 volts and ground terminals are used to connect
SDM sensors and peripherals.
OV1.2 Communication and Data Storage
OV1.2.1 PCMCIA PC Card
One slot for a Type I/II/III PCMCIA card. The keyboard display is used to
check card status. The card must be powered down before removing it. The
card will be reactivated if not removed.
Removing a card while it is active can cause garbled data
and can actually damage the card. Do not switch off the
CR5000 power while the card is present and active.
OV1.2.2 CS I/O
A 9-pin serial I/O port supports CSI peripherals.
OV1.2.3 Computer RS-232
RS-232 Port
CAUTION