WEG RTW Interface & Timing Relays
Compact relays and timers to bridge PLC I/O and field devices.
RTW interface relays deliver pluggable flexibility, wide coil voltages, and diagnostic indicators so you can isolate PLC outputs, expand I/O, and manage timing logic without bulky hardware. Pair them with monitoring relays to capture phase loss, voltage imbalance, and pump protection alarms.
Interface Relay Portfolio
1CO or 2CO contact sets rated 10 A with coil voltages from 12 VDC to 240 VAC.
6 mm wide relay modules with push-in terminals, status LED, and test button.
3CO contacts rated 12 A/250 VAC with mechanical indicator and lock-down test lever.
Timing & Monitoring
8 timing functions with ranges from 0.05 s to 100 h, dual relay outputs, and DIN rail sockets.
Detect phase loss, reversal, undervoltage, and overcurrent with adjustable thresholds and LED indication.
Conductive level control with automatic alternation, pump protection, and alarm outputs.
Socket & Wiring Options
- DIN rail sockets with screw or push-in terminals and integrated retaining clips.
- Isolated common terminals for easy bridging and distribution wiring.
- Snap-on marker strips, jumpers, and end plates for tidy panel layouts.
- Optional diode or RC snubber modules for coil suppression.
Application Highlights
- PLC output isolation, signal inversion, and interlocking for motor starters.
- Time-delayed start/stop sequences for pumps, compressors, and conveyors.
- Voltage and phase monitoring for critical loads and remote alarm points.
- Compact control cabinets and OEM machinery with limited DIN rail space.
Why Integrators Choose RTW Relays
Wide Coil Coverage
Single relays support 12–240 VAC/DC coil ranges, reducing spare part inventories.
Service-Friendly
Mechanical indicators, LED status, and test buttons simplify troubleshooting without removing wiring.
Panel Density
Slim housings and jumper-ready sockets enable high-density I/O marshalling next to PLC racks.
Function Flexibility
Multi-function timing modules cover on-delay, off-delay, interval, and cyclic modes with one part number.
Relay & Timer Selection Guide
| Series | Contact Form | Coil Range | Features |
|---|---|---|---|
| RTW17 | 1CO / 2CO, 10 A | 12–240 VAC/DC | Plug-in with mechanical flag, LED indicator, test button, and push-in sockets. |
| RTW33 | 1CO, 6 A | 24 VDC, 24/120 VAC | 6 mm slim relay with pluggable jumpers, status LED, and marking tabs. |
| RTW-T | 1CO or 2CO, 8 A | 24–240 VAC/DC | Multi-function timer, rotary dial setting, wide timing ranges, LED output indication. |
| RTW-M | 1CO, 5 A | 24, 110, 230 VAC | Phase monitoring for loss, reversal, and imbalance with adjustable thresholds. |
Control Panel Integration Services
Gross Automation packages RTW relays with terminal blocks, power supplies, and PLC wiring harnesses to deliver turnkey control panels. We document socket wiring, numbering, and PLC addressing for seamless commissioning.
- Relay logic schematics with cross-references to PLC I/O cards.
- Pre-wired socket assemblies with labeled jumpers and terminal markers.
- Timing and monitoring configuration sheets for maintenance teams.
- Remote support for troubleshooting, replacements, and spare part planning.
Bundled Solutions
PLC I/O Cabinets
Relay banks matched to PLC500 or CLIC PLC architectures with terminal schedules.
Motor Starter Interlocks
Pre-engineered interlock relays for forward/reverse, star-delta, and pump duplexing.
Monitoring Suites
Voltage, current, and level monitoring relays tied into SCADA dashboards for alarms.
Documentation & Tools
- RTW interface relay catalog with socket cross-reference tables.
- Timing function cheat sheets and application notes for pump sequencing.
- Monitoring relay configuration worksheets capturing voltage and current thresholds.
- Panel labeling templates with terminal numbering and test point references.
Need Help with PLC Integration?
Our automation engineers map RTW relays to PLC I/O, generate tag databases, and create test scripts so your commissioning team can focus on production.
Plan an Integration Session