General information
Product type designationCM 1241 RS 232 / 422 / 485
based on6ES7241-1EA50-0XB0
Input current
from backplane bus 5 V DC, typ.170 mA
Power loss
Power loss, typ.0.9 W
Interfaces
Interfaces/bus typeRS 232 (full duplex) / 422 / 485
Number of interfaces1
Point-to-point connection
Cable length, max.1 000 m; RS 232 10 m shielded max., RS 422/485 1 000 m shielded max.
Integrated protocol driver
— FreeportYes
— ASCIIYes; Available as library function
— Modbus RTU masterYes
— Modbus RTU deviceYes
— USSYes; Available as library function
RS 232
Transmission rate, max.115.2 kbit/s
RS 485
Transmission rate, max.250 kbit/s
Freeport
— Telegram length, max.4 kbyte
— Bits per character7 or 8
— Number of stop bits1 (Standard), 2
— Parityno parity (standard); even, odd, mark (parity bit always 1); space (parity bit always 0)
Modbus RTU master
— Address area1 through 65535 (Standard Modbus addressing)
— max. number of devices247; slave numbers 1 through 247, per MODBUS network segment maximum 32 devices, additional repeaters needed to expand the network to maximum configuration
Modbus RTU device
— Address area1 through 65535 (Standard Modbus addressing)
Interrupts/diagnostics/status information
Diagnostics functionYes
Diagnostics indication LED
DIAG LEDYes
for status of the outputsYes
Degree and class of protection
IP degree of protectionIP20
Free fall
Fall height, max.0.3 m; five times, in product package
Ambient temperature during operation
min.-40 °C
max.60 °C; at max. voltages and max. specifications
horizontal installation, min.-40 °C; incl. condensation/frost
horizontal installation, max.70 °C; at rated voltages, 50 % of max. specification and alternate IO active
vertical installation, min.-40 °C
vertical installation, max.50 °C; at max. voltages and max. specification
Ambient temperature during storage/transportation
min.-40 °C
max.70 °C
Air pressure acc. to IEC 60068-2-13
Operation, min.540 hPa
Operation, max.1 140 hPa
Storage/transport, min.540 hPa
Storage/transport, max.1 140 hPa
Altitude during operation relating to sea level
Installation altitude, min.-1 000 m
Installation altitude, max.5 000 m; Restrictions for installation altitudes > 2 000 m, see manual
Relative humidity
With condensation, tested in accordance with IEC 60068-2-38, max.100 %; RH incl. condensation / frost (no commissioning in bedewed state), horizontal installation
Vibrations
Vibration resistance during operation acc. to IEC 60068-2-63.5 mm from 5 - 8.4 Hz, 1g from 8.4 - 150 Hz
Operation, tested according to IEC 60068-2-6Yes
Shock testing
tested according to IEC 60068-2-27Yes; IEC 68, Part 2-27 half-sine: strength of the shock 15 g (peak value), duration 11 ms
Coolants and lubricants
— Resistant to commercially available coolants and lubricantsYes; Incl. diesel and oil droplets in the air
Use in stationary industrial systems
— to biologically active substances according to EN 60721-3-3Yes; Class 3B2 mold, fungus and dry rot spores (with the exception of fauna); Class 3B3 on request
— to chemically active substances according to EN 60721-3-3Yes; Class 3C4 (RH < 75%) incl. salt spray acc. to EN 60068-2-52 (severity degree 3)
— to mechanically active substances according to EN 60721-3-3Yes; Class 3S4 incl. sand, dust
Use on ships/at sea
— to biologically active substances according to EN 60721-3-6Yes; Class 6B2 mold, fungal and dry rot spores (excluding fauna)
— to chemically active substances according to EN 60721-3-6Yes; Class 6C3 (RH < 75%) incl. salt spray acc. to EN 60068-2-52 (severity degree 3).
— to mechanically active substances according to EN 60721-3-6Yes; Class 6S3 incl. sand, dust
Usage in industrial process technology
— Against chemically active substances acc. to EN 60654-4Yes; Class 3 (excluding trichlorethylene)
— Environmental conditions for process, measuring and control systems acc. to ANSI/ISA-71.04Yes; Level GX group A/B (excluding trichlorethylene; harmful gas concentrations up to the limits of EN 60721-3-3 class 3C4 permissible); level LC3 (salt spray) and level LB3 (oil)
Conformal coating
Coatings for printed circuit board assemblies acc. to EN 61086Yes; Class 2 for high reliability
Protection against fouling acc. to EN 60664-3Yes; Type 1 protection
Military testing according to MIL-I-46058C, Amendment 7Yes; Discoloration of coating possible during service life
Qualification and Performance of Electrical Insulating Compound for Printed Board Assemblies according to IPC-CC-830AYes; Conformal coating, Class A
Mechanics/material
PlasticYes
Dimensions
Width30 mm
Height125 mm
Depth100 mm
Weights
Weight, approx.178 g