PSM-ME-RS232/RS485-P Serial Interface Converter
RS232 to RS485 Converter with electrical isolation
- Convert RS232 to RS422 or RS485
- Transmission speeds up to 115.2 kbps
- Supports full duplex and half duplex
- 3-way electrical isolation
The PSM-ME-RS232/RS485-P bi-directionally converts RS-232 interface signals to the RS-485 2/4-wire and RS-422 standard.
With support for 4-wire balanced full duplex communication, or 2-wire half-duplex, the PSM-ME-RS232/RS485-P is suitable for most applications, including industrial, commercial and any general office computer device. Transmission speeds of 1.2 kbps up to 115.2 kbps can be applied to point-to-point and point-to-multipoint networks.
Use the PSM-ME-RS232/RS485-P in all common bus systems with UART/NRZ data format and character length of 10/11 bits. This is the best “plug and play” solution for converting RS-232 (V.24) to RS-422 (V.11) and RS-485, with electrical isolation.
RS232 to RS485 Converter Features
- RS-422 4-wire for point-to-point operation
- RS-485 2-wire operation, half duplex
- RS-485 4-wire operation, full duplex
- Automatic transmit/receive changeover
- Transmission speed from 1.2 kbps up to 115.2 kbps
- Integrated data indicator for dynamic indication of transmit and receive data
- High-quality 3-way isolation between power supply, V.24 (RS-232), and RS-422/485 for reliable decoupling of the potentials with 1.5 kV
- Integrated surge protection with transient discharge to the DIN rail
- Shipbuilding approval per DNV
Hardware Specifications - PSM-ME-RS232/RS485-P Serial Interface Converter
Serial interface
Interface 1
V.24 (RS-232) interface in acc. with ITU-T V.28, EIA/TIA-232, DIN 66259-1
Connection method
D-SUB 9 plug
Transmission length
15 m (shielded twisted pair)
Conductor cross section solid min.
0.2 mm²
Conductor cross section solid max.
2.5 mm²
Conductor cross section AWG min.
24
Conductor cross section AWG max.
12
Pin assignment
DTE/DCE switchover via switch
Protocols supported
Protocols supported
Serial transmission speed
1.2; 2.4; 4.8; 7.2; 9.6; 19.2; 31.25; 38.4; 57.6; 75; 93.75; 115.2 kbps
Interface 2
RS-422 interface in acc. with ITU-T V.11, EIA/TIA-422, DIN 66348-1
Connection method
Pluggable screw connection
Transmission length
1200 m (shielded twisted pair)
Termination resistor
- 390 Ω
- 150 Ω
- 390 Ω (Can be connected)
Conductor cross section flexible min.
0.2 mm²
Conductor cross section flexible max.
2.5 mm²
Conductor cross section AWG min.
24
Conductor cross section AWG max.
13
Protocols supported
transparent protocol
Serial transmission speed
1.2; 2.4; 4.8; 9.6; 19.2; 38.4; 57.6; 75; 93.75; 115.2 kbps
Interface 3
RS-485 interface in acc. with EIA/TIA-485, DIN 66259-1
Connection method
Pluggable screw connection
Transmission length
Automatic control or via RTS/CTS
Transmission length
1200 m (shielded twisted pair)
Termination resistor
- 390 Ω
- 150 Ω
- 390 Ω (Can be connected)
Conductor cross section flexible min.
2.5 mm²
Conductor cross section flexible max.
0.2 mm²
Conductor cross section AWG min.
14
Conductor cross section AWG max.
24
Protocols supported
transparent protocol
Serial transmission speed
1.2; 2.4; 4.8; 9.6; 19.2; 38.4; 57.6; 75; 93.75; 115.2 kbps
Ambient conditions
Ambient temperature (operation)
-40°C ... 70°C
Ambient temperature (storage/transport)
-40°C ... 85°C
Permissible humidity (operation)
10 % ... 95 % (non-condensing)
Altitude
5000 m (For restrictions see manufacturer's declaration)
Degree of protection
IP20
Noise immunity
EN 50 082-2
General
Electrical isolation
VCC // V.24 (RS-232) // RS-485
Test voltage data interface/power supply
1.5 kV AC
Electromagnetic compatibility
Conformance with EMC Directive 2014/30/EU
Net weight
139.88 g
Housing material
PA 6.6-FR
Color
green
MTTF
- 1654 Years (SN 29500 standard, temperature 25°C, operating cycle 21 % (5 days a week, 8 hours a day))
- 746 Years (SN 29500 standard, temperature 40°C, operating cycle 34.25 % (5 days a week, 12 hours a day))
- 310 Years (SN 29500 standard, temperature 40°C, operating cycle 100 % (7 days a week, 24 hours a day))
Conformance
CE-compliant
ATEX
II 3 G Ex nA IIC T4 Gc (Please follow the special installation instructions in the documentation!)
UL, USA/Canada
508 recognized
Noise emission
EN 50 081-1
MTBF
10 Years (Telcordia standard, temperature 40°C, operating cycle 100 % (7 days a week, 24 hours a day))
Transmission channels
2 (1/1), RxD, TxD, full duplex
Bit delay
≤ 2.5 µs
Bit distortion
≤ 5 %
Test voltage data interfaces
1.5 kV AC
Test voltage data interface/power supply
.5 kV AC
Degree of pollution
2
IECEx
Ex nA IIC T4 Gc
Power supply
Nominal supply voltage
24 V AC/DC
Supply voltage range
18 V AC/DC ... 30 V AC/DC (via pluggable COMBICON screw terminal block)
Typical current consumption
85 mA (24 V DC)
Max. current consumption
100 mA
Conductor cross section flexible max.
2.50 mm²
Conductor cross section flexible min.
0.20 mm²
Conductor cross section solid max.
2.50 mm²
Conductor cross section solid min.
0.20 mm²
Max. AWG conductor cross section, flexible
12
Min. AWG conductor cross section, flexible
24
Conductor cross section AWG max.
12
Conductor cross section AWG min.
24
Dimensions
Width
22.5 mm
Height
99 mm
Depth
114.5 mm
Environmental Product Compliance
China RoHS
Environmentally Friendly Use Period = 50
Reach and RoHS Compliant
Standards and Regulations
Electromagnetic compatibility
Conformance with EMC Directive 2014/30/EU
Free fall
In acc. with IEC 60068-2-32
Result: 1 m
Vibration resistance
In acc. with EN 60068-2-6/IEC 60068-2-6
Result: 5g, 10...150 Hz, 2.5 h, in XYZ direction
EMC Immunity
- EN 61000-4-2: Contact discharge ± 6 kV (Test Level 3)
- EN 61000-4-3: Frequency range 26 MHz ... 3 GHz (Test Level 3)
- EN 61000-4-4: Criterion B
- EN 61000-4-5: Signal ± 1 kV (Data line, asymmetrical)
- EN 55011
- EN 61000-4-6: Frequency range 0.15 MHz ... 80 MHz
Conformance
CE-compliant
ATEX
II 3 G Ex nA IIC T4 Gc
UL, USA/Canada
508 recognized
Noise emission
EN 50 081-1
Noise immunity
EN 50 082-2
Shock
In acc. with EN 60068-2-27/IEC 60068-2-27
Result: 25g, 11 ms period, half-sine shock pulse
Connection in acc. with standard
CUL
IECEx
Ex nA IIC T4 Gc
UL, USA/Canada
- Class I, Div. 2, Groups A, B, C, D
- Class I, Zone 2, AEx nA IIC T4
- Class I, Zone 2, Ex nA IIC T4 Gc X
Approvals
- UL Recognized
- cUL Recognized
- DNV
- EAC
- KC
- cULus Recognized
- UL Listed
- cUL Listed
- IECEx
- ATEX
- cULus Listed
Commercial data
Packing unit
1
Weight per piece
200.0 g
Country of origin
Germany
Application Diagrams
Point-to-point connection between two RS-232 interfaces via RS-422
Use the RS-422 standard to implement rapid, interference-free point-to-point connections. Connections between two RS232 devices covering up to 1200 m can be established using a shielded, twisted pair 4-wire cable.
RS232 to RS485 Multipoint
The RS-485 standard allows more than two devices to communicate with one another. By converting the RS-232 point-to-point interface into the bus-capable RS-485 standard, you can network up to 32 devices via a 2 or 4-wire cable.
Block Diagram
Click on a part number for ordering information
Product Image
Product Description
Power Cord & Part No.
PSM-ME-RS232/RS485-P - RS232 to RS485 converter. RS-232 DB9M to RS-422/485 terminal block - requires external DC power supply
PSM-ME-RS232/RS485-P - RS232 to RS485 converter. RS-232 DB9M to RS-422/485 terminal block – 24VDC USA wall power adapter included
PSM-ME-RS232/RS485-P - RS232 to RS485 converter. RS-232 DB9M to RS-422/485 terminal block - 24VDC UK wall power adapter included
PSM-ME-RS232/RS485-P - RS232 to RS485 converter. RS-232 DB9M to RS-422/485 terminal block – 24VDC EU wall power adapter included
Related Accessories
Accessory Image
Accessory Description
Part No.
AC US WALL MOUNT ADAPT TL 24VDC , 18W wall power adapter, with tinned leads - 0 to 60C. For use with TC EXTENDER, PSI-MOS Converters, PSM-ME Isolator, PSM-ME Converter and PSM-ME Repeater
AC UK WALL MOUNT ADAPT TL 24VDC , 18W wall power adapter with tinned leads - 0 to 60C. For use with TC EXTENDER, PSI-MOS Converters, PSM-ME Isolator, PSM-ME Converter and PSM-ME Repeater
AC EU WALL MOUNT ADAPT TL 24VDC, 18W wall power adapter with tinned leads - 0 to 60C. For use with TC EXTENDER, PSI-MOS Converters, PSM-ME Isolator, PSM-ME Converter and PSM-ME Repeater
UNO-PS/1AC/24DC/60W DIN-Rail Power Supply: 24 VDC, 60 Watt with universal 85 to 264 VAC, -25 to 70°C extended operating temperature.
UNO-PS/1AC/24DC/150W Power Supply - DIN-Rail 24 VDC , 150 Watt power supply with universal 85 to 264 VAC, -25 to 70°C extended operating temperature
