Specifications – Rockwell Automation 1794-IP4/B INSTL INSTR 24V dc FLEX I/O 4 CHANNEL User Manual

Page 5

Publication 1794-IN064D-EN-P - March 2005

Specifications

Pulse Counter Module, Cat. No. 1794-IP4

Number of Inputs

Module Location

Cat. No. 1794-TB2, -TB3, -TB3S, -TBN

Dimensions (with module
installed in base)

Imperial

Metric

3.7H x 3.7W x 2.7D inches
94H x 94W x 69D mm

Counting Frequency

100kHz maximum - Each signal condition must be stable for at least
2

µs to be recognized

Input Range Input ON

Input OFF

26.4V dc (24V dc +10%) maximum

6V dc minimum

3V dc maximum

-26.4V dc minimum

Input Current (typical)

3mA @ 6V dc

9mA @ 12V dc

15mA @ 24V dc

Data Format

Period read in 1

µs counts with 1 MHz internal clock selected;

0.1

µs counts when 10 MHz internal clock selected.

Overflow

Maximum period is 65 ms when 1 MHz internal clock selected;
maximum period = 6.5 ms when 10 MHz internal clock selected

Isolation Voltage

Tested at 600V ac for 1s

Flexbus Current

5mA at 5V dc

Power Supply (external)

12...24V dc (+10%)

Current Consumption
from external power
supply

150mA @ 12V dc

75mA @ 24V dc

Power Dissipation

5W maximum @ 26.4V dc

Thermal Dissipation

17.1 BTU/hr (maximum) @ 26.4V dc

Indicators (field side
indication, customer
device driven)

1 green/red power/status indicator

8 yellow status indicators

Keyswitch Position

Environmental Conditions

Operating
Temperature

IEC 60068-2-1 (Test Ad, Operating Cold),
IEC 60068-2-2 (Test Bd, Operating Dry Heat),
IEC 60068-2-14 (Test Nb, Operating Thermal Shock):
0 to 55°C (32 to 131°F)

Storage Temperature

IEC 60068-2-1 (Test Ab, Unpackaged Nonoperating Cold),
IEC 60068-2-2 (Test Bb, Unpackaged Nonoperating Dry Heat),
IEC 60068-2-14 (Test Na, Unpackaged Nonoperating Thermal Shock):
–40 to 85°C (–40 to 185°F)

Relative Humidity

IEC 60068-2-30 (Test Db, Unpackaged Nonoperating

Damp Heat):
5 to 95% non-condensing

Vibration

IEC60068-2-6 (Test Fc, Operating):
5g @ 10-500Hz

Shock

IEC60068-2-27 (Test Ea, Unpackaged shock):
Operating 30g
Non-operating 50g

Emissions

CISPR 11:
Group 1, Class A (with appropriate enclosure)

ESD Immunity

IEC 61000-4-2:
4kV contact discharges
8kV air discharges

Radiated RF Immunity

IEC 61000-4-3:
10V/m with 1kHz sine-wave 80%AM from 80MHz to 1000MHz

EFT/B Immunity

IEC 61000-4-4:
±2kV at 5kHz on signal ports

Surge Transient
Immunity

IEC 61000-4-5:
±1kV line-earth(CM) on shielded ports

Conducted RF
Immunity

IEC 61000-4-6:
10Vrms with 1kHz sine-wave 80%AM from 150kHz to 80MHz

Enclosure Type Rating

None (open-style)

Conductors

Wire

Length (maximum)