
85
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Physical
Size
(without mounting brackets)
Length
: 9.5"
Height
: 7.2"
Depth
: 3.4"
Weight
2.5 lb.
Environmental
Storage
Temperature
: ‑50 °C to 85 °C
Humidity
: 0 to 95 %, non‑condensing
Operating
Temperature
: ‑40 °C to 72 °C
Humidity
: 0 to 95 %, non‑condensing
Mounting
Shelf or backboard (includes mounting brackets)
Construction
Chassis
Fully enclosed, anodized aluminum
Externally accessible keypad, LEDs and connec‑
tors
Electrical
All components mounted on conformal coated,
internal PCBs
Power
Voltage
Range
: 9 to 36 Vdc
Consumption
Typical
: 2 W
Maximum
: 4 W (with GPS Receiver, Ethernet and
Modem options)
Isolation
Power
Minimum
: 3800 Vdc from B and N terminals to
chassis and inputs
Analog Inputs
Minimum
: 3800 Vdc to any terminal
Input to Adjacent Input
Analog
: minimum 3200 Vdc
USB Host and Device Ports
Minimum
: 3800 Vdc to any terminal
GPS Receiver and Ethernet Port (optional)
Minimum
: 3800 Vdc to any terminal
Internal Modem (optional)
Designed to meet FCC part 68 standards
Capacities
Inputs
Digital
: 999, as available from Siemens S7‑300
Analog
: 4 total, voltage or current (optional)
Virtual
: 8, user assigned
Timer
: 16, user assigned
Outputs
Relay
: 1, form C, rated for 2 A at 24 Vdc or 1 A at
125 Vac, maximum switching capacity of 125 VA
or 60 W, service life 1 million electrical (typical)
Event Storage
Standard
: 284,785 records
Maximum
: 1,182,769 records
Liquid Crystal Display
Characters
: 80 total on 4 lines
Viewing Area
: 2.8" by .8"
Front Panel Keypad
Quantity
: 20 keys
Inputs
Input Impedance
Analog
: minimum 10 MOhms
Range
Analog DC Voltage
: 3 scales, ±25.5, +51.1, ±255
Analog AC Voltage
: 2 scales, 25.5, 255
Event Validation Times
Digital
: not applicable, Siemens S7‑300 transmits
999 bit states 3 times per second using 3964R
protocol
Analog
: fast and slow filter settings
Analog Limit Values
Voltage
High and Low Limits
: in multiples of .1 V or 1 V
Current
High and Low Limits
: in multiples of .1 A
Analog Input Accuracy
Typical Vdc
: ±1 % full scale
Typical Vac
: ±1.5 % full scale
Typical Current
: ±2 % full scale
Virtual Inputs
Definitions
Any logical association shared by 1 to 4 variables
(i.e., Digital, Analog, Timer or other Virtual Inputs)
Assigned by defining the state of the Virtual Input
for each combination of variable states
Reporting
Creates standard Event Records
Relay can be controlled by each Virtual Input
Modem (optional) can be enabled to dial out
Event Records
Timer Inputs
Programming
Any input can be assigned as a trigger or termi‑
nating source
On or Off events can be assigned as a trigger or
terminating source
Limit Values
High and Low Limits
: in multiples of .1 seconds
Range
: 0.0 to 999.9 seconds
Reporting
Measured Time is reported in each Timer Input
Event Record
Violation of Limit Values are also reported
Temperature Sensing
Usage
: measures and reports internal tempera‑
ture of logger
High and Low Limits
: ‑67 °F to 257 °F
Memory
Type
Non‑volatile, Event Records and Setup Database
are stored in flash memory chip
Newest data over‑writes oldest data, 129th day
over-writes first day
Storage Longevity
Infinite with power off
Rated for 100,000 write operations
Ports
RS‑232
Quantity
: 1, for use with a PC
Terminal Emulation
: ANSI
Baud Rates
: 300, 600, 1200, 2400, 4800, 9600,
19,200, 38,400, 57,600, 115,200
Bit Format
: 8‑N‑1
Vital‑Processor Port
Quantity
: 1, connects to CP 340 of Siemens
S7‑300
Bit Messaging
: Siemens S7‑300 transmits 999
bit states 3 times per second
Protocol
: Siemens 3964R
Baud Rates
: 300, 600, 1200, 2400, 4800, 9600,
19,200, 38,400, 57,600, 115,200
Default Rate
: 9600
Bit Format
: 8‑N‑1
USB Host
Compatible with any FAT-32 formatted flash drive
Can create a text file of Event Record data from
any time span
Can be used to update firmware
USB Device
Eliminates need for serial comm port, data trans‑
fer rates of 960 Kbps
Summary of Contents for CWR-24E
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