On the Outside
80-Character LCD
The LCD and Keypad allow an onsite user to fully access the device without using a PC. Access is protected by an 8-digit Passcode.
20-Position Keypad
The LCD and Keypad allow an onsite user to fully access the device without using a PC. Access is protected by an 8-digit Passcode.
3 Front Panel LEDs
LEDs are used to indicate power, Terminal Port and Modem activity.
USB Host Port
A user-selected range of Event Records can be quickly saved to a USB Flash Drive. Both text and GEA-version records are saved.
20 Digital Inputs
All Digital Inputs are fully isolated by optical means. On/off conditions are 9 to 36Vdc and 0 to 1Vdc, respectively.
Detachable Connectors
All input, power and relay connectors are detachable for ease of installation. Tension clamp connectors are used throughout.
Serial Terminal Port
Baud rates from 300 to 115,200 are supported. The default Baud rate is 38,400. The Terminal Port can be used with a USB-to-serial adapter.
GPS Receiver (opt.)
Without user intervention, the internal real-time clock (RTC) can be kept 100% accurate by using the GPS Receiver option. The option comes with an external, ruggedized antenna.
Ethernet Port (opt.)
The Ethernet Port option allows remote users to access the device via a LAN connection. Additionally, if a time server is accessible it can be used to maintain 100% RTC accuracy.
USB Device Port
The USB Device Port provides a very high speed alternative to the serial Terminal Port. It is crucial for PC's lacking a serial comm port and when a USB-to-serial adapter is not available.
Internal Modem (opt.)
The internal Modem option can be used with a typical land line to provide remote access. Access is restricted by means of a user-defined password. It supports speeds up to 33,600 Baud.
4 Analog Inputs
Positive and negative DC and AC voltages are continuously monitored by the Analog Inputs. Separate user-defined High and Low Limit Values are used to identify abnormal conditions.
Relay Output
User-programmed Virtual Inputs control the operation of the Relay Output. It can be used to provide an external indicaton of a fault or failure condition.
BN Power
Typical battery power can be used to power the device. Its operating range is 9 to 36Vdc. The internal power supply is fully isolated.
CWR‑24A Documentation
On the Inside
Up to 128 days of Event Storage
Irrespective of how many days are saved in memory, after the memory is filled new data automatically overwrites the oldest data. Similarly, the 129th day overwrites the first day.
307,123 Event Record Storage Capacity (exp.)
Memory can be optionally expanded to 1,274,611 Event Records.
Events Time Stamped to .001 sec.
Time stamping at 1/1000th of a second can be useful when monitoring high speed or short duration electronically generated signals.
Non-Volatile Memory With No Internal Batteries
Event Records and the Setup Database are retained indefinitely, even when power is not applied. There are no batteries or other consumables to replace.
Clock Accuracy ±8 sec. per Month (std.)
Even in the absence of clock synchronization the RTC is highly accurate. The clock will continue to run with a loss of power of up to 30 days duration.
100% Accurate Clock (opt.)
The GPS Receiver and Ethernet Port options can be used to maintain 100% accuracy of the RTC. Using the Ethernet Port option for this purpose requires an accessible time server.
Tamperproof Event Records
At the user's discretion, an Event Record report can be digitally signed. The signature can be used to detect alterations of the report.
8 Programmable Virtual Inputs
Logical conditions among any 4 Digital, Analog or other Virtual Inputs are automatically detected using the Virtual Input feature. These conditions, that may be of special interest to the user, are logged to memory as Event Records.
16 Programmable Timer Inputs
The duration between any 2 events can be measured and reported as an Event Record. User-defined High and Low Limit Values can be used to detect abnormally long or short durations.
4 Programmable Train Speed Monitors
The monitors calculate the average front-of-train speed. A user-defined Limit Value is used to report excessive speed.
Flash Rate Reporting and Measurement
This feature can be used to precisely measure the flash rate. Additionally, the flash rate is reported in each Event Record when flashing is present.
Internal Temperature Sensor
The internal temperature of the device is continuously monitored. Excessively hot or cold conditions are logged to memory as Event Records.