PSM-ME-RS232/RS232-P Serial Isolator
Interface converter for the electrical isolation of RS-232 interfaces
- 3-way isolation up to 2 kV
- Transmission speed of 115.2 kbps
- Integrated surge protection
- Transmit TxD/RxD data channels and RTS/CTS control lines
For the electrical isolation of RS-232 (V.24) interfaces, the PSM-ME-RS232/RS232-P is the ideal solution.
3-way EMI, RFI and Transient Surge Immunity
The RS-232 interface is an asymmetric voltage interface with common signal ground for all signals. In addition to its very low signal power, a characteristic feature of the interface is that the signal ground is connected to the grounded chassis housing. This results in very little immunity to interference and a maximum range of 15 meters. Using the PSM-ME-RS232/RS232-P Serial Isolator, considerably higher immunity to interference in industrial applications can be achieved.
By isolating the TX/RX data channels and the RTS/CTS control lines the PSM-ME-RS232 Serial Isolator effectively protects your RS232 devices from transient surges, lightning strikes, ground loops and noise issues.
With their high-grade 3-way isolation between both interface sides the PSM-ME-RS232 provides a floating and interference resistant RS-232 interface for the supply and ground potential. Expensive termination devices are also protected against damage by this decoupling.
Any additional potential EMI can be removed from the transmission path by using additional PSM-ME-RS232 Serial Isolators on both device interfaces.
The PSM-ME-RS232 Serial Isolators can be wall mount AC powered or snapped onto standard DIN rails supplied with 24V DC or AC. In the case of variable cable lengths, the RS-232 connection on the field side can be established conveniently using plug-in screw terminal blocks
Serial Isolator Features
- Maximum transmission speed of 115.2 kbps
- High-quality 3-way isolation up to 2 kV (VCC, V.24 (RS-232), TTY)
- Integrated surge protection with transient discharge to the DIN rail
- Transmission speed up to 115.2 kbps
- Transmission of TxD/RxD data channels and RTS/CTS control lines
- Active data transmission indicated by separate data indicators for the transmit and receive channels
- 24 V DC or AC power supply suitable for the control cabinet
Hardware Specifications - PSM-ME-RS232/RS232-P Serial Isolator
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.
13
Pin assignment
DTE/DCE switchover via switch
Protocols supported
transparent protocol
Serial transmission speed
115.2 kbps
Interface 2
V.24 (RS-232) interface in acc. with ITU-T V.28, EIA/TIA-232, DIN 66259-1
Connection method
Pluggable screw connection
Transmission length
15 m (shielded twisted pair)
Conductor cross section flexible min.
0.2 mm²
Conductor cross section AWG min.
24
Conductor cross section AWG max.
13
Ambient conditions
Ambient temperature (operation)
0°C ... 55°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 61000-6-2:2005
General
Electrical isolation
VCC // V.24 (RS-232) (A) // V.24 (RS-232) (B)
Test voltage data interface/power supply
2 kVrms (50 Hz, 1 min.)
Standards and Regulations
Electromagnetic compatibility
Conformance with EMC Directive 2014/30/EU
Net weight
123.18 g
Housing material
PA
Color
green
Conformance
CE-compliant
UL, USA/Canada
508 recognized
Noise emission
EN 61000-6-3
MTBF
- 2263 Years (Telcordia standard, 25°C temperature, 21% operating cycle (5 days a week, 8 hours a day))
- 438 Years (Telcordia standard, 40°C temperature, 34.25% operating cycle (5 days a week, 12 hours a day))
Transmission channels
Transmission channels
Bit delay
< 3 µs
Bit distortion
< 5 %
Test voltage data interfaces
2 kV AC
Test voltage data interface/power supply
2 kV AC
Power supply
Nominal supply voltage
24 V AC/DC ±20 %
Supply voltage range
19.2 V AC/DC ... 28.8 V AC/DC
Typical current consumption
40 mA (24 V DC)
Protective circuit
Surge protection Suppressor diode
Dimensions
Width
22.5 mm
Height
99 mm
Depth
118.6 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
EMC Immunity
- EN 61000-4-2: Contact discharge ± 6 kV (Test Level 3)
- EN 61000-4-3: Frequency range Test Level 3
- EN 61000-4-4: Criterion B
- EN 61000-4-5: Signal ± 2 kV (12 Ω)
- EN 55011
- EN 61000-4-6
Conformance
CE-compliant
UL, USA/Canada
508 recognized
Noise emission
EN 61000-6-3
Noise immunity
EN 61000-6-2:2005
Connection in acc. with standard
CUL
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
- cULus Recognized
- UL Listed
- cUL Listed
- cULus Listed
Commercial data
Packing unit
1
Weight per piece
181.2 g
Country of origin
Germany
Application Diagrams
Interference-free RS-232 interface
Electrical isolation
Interface Converter
Block Diagram
Click on a part number for ordering information
Product Image
Product Description
Power Cord & Part No.
PSM-ME-RS232/RS232-P - Serial Isolator. Interface converter for the electrical isolation of RS-232 interfaces ( 4 channels ). Connections via DB9M and terminal block - requires external DC power supply
PSM-ME-RS232/RS232-P - Serial Isolator. Interface converter for the electrical isolation of RS-232 interfaces ( 4 channels ). Connections via DB9M and terminal block– 24VDC USA wall power adapter included
PSM-ME-RS232/RS232-P - Serial Isolator. Interface converter for the electrical isolation of RS-232 interfaces ( 4 channels ). Connections via DB9M and terminal block– 24VDC UK wall power adapter included
PSM-ME-RS232/RS232-P - Serial Isolator. Interface converter for the electrical isolation of RS-232 interfaces ( 4 channels ). Connections via DB9M and 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
