How to Select an Interface Relay for PLC Outputs
A step-by-step guide to matching PLC output type, coil voltage and current, contact rating, and socket style when selecting an interface relay.
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The Siemens 6GK7542-6UX00-0XE0 is a SIMATIC NET CP 1542SP-1 communication processor that connects a SIMATIC ET 200SP station to Industrial Ethernet over an integrated 2-port switch at 10 to 100 Mbit/s. It handles open IE communication over TCP/IP, ISO-on-TCP, and UDP, PG/OP traffic, S7 routing, and NTP time synchronization, and requires a separate bus adapter.
Up to 2 CP 1542SP-1 modules can be plugged per ET 200SP CPU for redundant or segmented network connections, and simultaneous operation alongside a CM DP module is supported if PROFIBUS is also needed on the same station. The 32 open (T-block) connections plus 16 S7 connections give enough headroom for a station also running SNMP, DCP, and LLDP management traffic without exhausting connection resources. Because the bus adapter, RJ45, FC, or SCRJ, is ordered separately, confirm the physical media choice before ordering - the CP itself is media-agnostic at the module level.
Adding a second, independently addressable Industrial Ethernet connection to a SIMATIC ET 200SP station for network segmentation, redundant PG/OP access, open TCP/IP or UDP communication to third-party devices, or NTP-synchronized time distribution.
| product type designation | CP 1542SP-1 Communications processor CP 1542SP-1 for connection of an SIMATIC S7-ET 200SP to Industrial Ethernet; open IE communication (TCP/IP, ISO-on-TCP, UDP), PG/OP, S7 routing, IP broadcast/multicast, SNMPV1, DHCP, Email, IPV4/IPV6, time-of-day synchronization via NTP, access to web server of CPU, bus adapter required. |
|---|---|
| product brand name | SIMATIC NET |
| transfer rate: at the 1st interface | 10 ... 100 Mbit/s |
|---|
| number of interfaces / according to Industrial Ethernet | 1 |
|---|---|
| number of electrical connections: at the 1st interface / according to Industrial Ethernet | 2 |
| type of electrical connection: at the 1st interface / according to Industrial Ethernet | via ET 200SP bus adapter (RJ45, FC, SCRJ), integrated switch |
| Part number | 6GK7542-6UX00-0XE0 |
|---|---|
| Type designation | CP 1542SP-1 Communications processor CP 1542SP-1 for connection of an SIMATIC S7-ET 200SP to Industrial Ethernet; open IE communication (TCP/IP, ISO-on-TCP, UDP), PG/OP, S7 routing, IP broadcast/multicast, SNMPV1, DHCP, Email, IPV4/IPV6, time-of-day synchronization via NTP, access to web server of CPU, bus adapter required. |
| Brand | Siemens |
| Condition | New, factory sealed |
| Source | Siemens and its authorised distributors |
| Warranty | Manufacturer warranty |
| Lifecycle status | Phase-out announced by the manufacturer |
| EAN | 4047622199619 |
| ETIM class | EC001423 |
| eCl@ss | 27242208 |
| type of voltage / of the supply voltage | DC |
|---|---|
| supply voltage | 24 V |
| power loss [W] | 6 W |
| ambient temperature: for vertical installation / during operation | -30 ... +50 °C |
|---|---|
| ambient temperature: for horizontally arranged busbars / during operation | -30 ... +60 °C |
| ambient temperature: during storage | -40 ... +70 °C |
| ambient temperature: during transport | -40 ... +70 °C |
| relative humidity: at 25 °C / without condensation / during operation / maximum | 95 % |
| protection class IP | IP20 |
| width | 60 mm |
|---|---|
| height | 117 mm |
| depth | 74 mm |
| fastening method: 35 mm DIN-rail mounting | Yes |
| number of units: per CPU / maximum | 2 |
|---|---|
| number of units: note | 2 CPs can be pluged in per CPU, simultaneous operation with BA Send and CM DP is possible |
| number of possible connections / for open communication: by means of T blocks / maximum | 32 |
|---|---|
| data volume: as user data per ISO on TCP connection / for open communication / by means of T blocks / maximum | 65536 byte |
| number of possible connections / for S7 communication: maximum | 16 |
|---|---|
| number of possible connections / for S7 communication: with OP connections / maximum | 16 |
| number of active connections / with multi-protocol mode | 32 |
|---|
| product function / MIB support | Yes |
|---|---|
| protocol / is supported: SNMP v1 | Yes |
| protocol / is supported: SNMP v3 | No |
| protocol / is supported: DCP | Yes |
| protocol / is supported: LLDP | Yes |
| configuration software: required | STEP 7 Professional V14 (TIA Portal) or higher |
| identification & maintenance function: I&M0 - device-specific information | Yes |
| identification & maintenance function: I&M1 - higher level designation/location designation | Yes |
| product function / is supported / identification link | Yes; acc. to IEC 61406-1:2022 |
| product function / web-based diagnostics | Yes; via ET 200SP CPU |
|---|
| product function: blocking of communication via physical ports | Yes |
|---|
| product function / SICLOCK support | Yes |
|---|---|
| product function / pass on time synchronization | No |
| protocol / is supported: NTP | Yes |
| protocol / is supported: NTP (secure) | No |
| time synchronization: from NTP-server | Yes |
| certificate of suitability / CE marking | Yes |
|---|---|
| certificate of suitability / UKCA marking | Yes |
| certificate of suitability / Regulatory Compliance Mark (RCM) | Yes |
| certificate of suitability / RoHS conformity | Yes |
| certificate of suitability / EAC approval | Yes |
| certificate of suitability / ATEX | Yes |
|---|---|
| certificate of suitability / IECEx | Yes |
| certificate of suitability / CCC / for hazardous zone according to GB standard | Yes |
| certificate of suitability / FM registration | Yes |
| Environmental Product Declaration | Yes |
|---|---|
| global warming potential [CO2 eq]: total | 207.05 kg |
| global warming potential [CO2 eq]: during manufacturing | 19.13 kg |
| global warming potential [CO2 eq]: during operation | 187.74 kg |
| global warming potential [CO2 eq]: after end of life | 0.18 kg |
| formity tion | For use in hazard- |
|---|---|
| General Product Approval China RoHS | ous locations |
| Net weight | 0.201 kg |
|---|---|
| Package dimensions | 110 × 62 × 24 mm |
| Country of origin | DE |
| Shipping weight | 0.701 kg |
| Ships from | Türkiye |
| Dispatch | 13 Nov |
| Stock | In stock |
Source: manufacturer data · Last verified: 01 Nov 2026
No documents are on file for this part yet.
Ask us for the datasheetThe tariff (HS) code on file for CP 1542SP-1 Communications processor CP 1542SP-1 for connection of an SIMATIC S7-ET 200SP to Industrial Ethernet; open IE communication (TCP/IP, ISO-on-TCP, UDP), PG/OP, S7 routing, IP broadcast/multicast, SNMPV1, DHCP, Email, IPV4/IPV6, time-of-day synchronization via NTP, access to web server of CPU, bus adapter required. is 85176200.
The EAN (GTIN) of CP 1542SP-1 Communications processor CP 1542SP-1 for connection of an SIMATIC S7-ET 200SP to Industrial Ethernet; open IE communication (TCP/IP, ISO-on-TCP, UDP), PG/OP, S7 routing, IP broadcast/multicast, SNMPV1, DHCP, Email, IPV4/IPV6, time-of-day synchronization via NTP, access to web server of CPU, bus adapter required. is 4047622199619.
CP 1542SP-1 Communications processor CP 1542SP-1 for connection of an SIMATIC S7-ET 200SP to Industrial Ethernet; open IE communication (TCP/IP, ISO-on-TCP, UDP), PG/OP, S7 routing, IP broadcast/multicast, SNMPV1, DHCP, Email, IPV4/IPV6, time-of-day synchronization via NTP, access to web server of CPU, bus adapter required. ships from Türkiye. Shipping calculated at checkout · import duties and taxes paid on arrival. Stock items are dispatched within 1–2 business days.
A step-by-step guide to matching PLC output type, coil voltage and current, contact rating, and socket style when selecting an interface relay.
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