Shinkawa VM-721B/TB1 Relay Output Module
VM-721B/TB1 is an 18 channel programmable relay output module for the Shinkawa VM-7 series TSI system in Japan. Collect warning, danger, and fault signals from various monitoring modules such as vibration, displacement, speed, and temperature within this rack; VM-721B/TB1 performs programmable logic operations (AND, OR, non logical combinations) internally and outputs 18 independent relay dry contacts; Output unit comprehensive alarm and trip interlock contacts to DCS and interlocking system; VM-721B/TB1 is used to expand the number of system alarm output contacts, achieve logical combination of multiple measurement point alarms, complete the output of hard contacts for rotating machinery protection interlocking, and compensate for the problem of insufficient relay channels in a single monitoring module.
The role of VM-742B1-5 is to serve as the external digital communication gateway for the entire VM-7 TSI system; Upload the measurement values, alarm status, and fault information of each monitoring module (VM-701B, etc.) to DCS, PLC, and upper monitoring computer through Modbus TCP Ethernet protocol; Support PC diagnostic software connection to achieve module parameter configuration, fault diagnosis, and waveform data reading; Replacing traditional 4-20mA hard wiring, realizing digital data exchange of the entire TSI rack, it is the core network interface board for the integration of VM-7 system and external control system
Parameter Specifications
| Parameter | Value |
|---|---|
| Model | VM‑721B/TB1 |
| Product family | VM‑7 Series TSI System |
| Module type | 18‑channel programmable relay module |
| Termination option | /TB1 front‑plug terminal block |
| Install slot | Only for slot11 of VM‑761B chassis |
| Total relay output | 18 channels relay dry contact |
| Contact rating | 250 V AC / 30 V DC, 2 A per contact |
| Logic function | AND / OR / NOT combinatorial logic |
| Logic elements | Max 255 elements per relay channel |
| Backplane bus | VM‑7 rack internal backplane bus |
| Power supply | Supplied by rack backplane 24 V DC |
| Power consumption | ＜12 W |
| Hot‑swap | Hot‑swappable |
| Operating temperature range | 0 ~ +60 ℃ |
| Storage temperature range | ‑20 ~ +70 ℃ |
| Relative humidity | 5‑95% non‑condensing |
| Dimension(W×H×D) | 45 ×120 ×210 mm |
| Weight | 0.65 kg |
| Origin | Japan |
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Product features
- Dual port RJ45 Ethernet interface, Modbus TCP industrial Ethernet protocol, can simultaneously interface with DCS systems and diagnostic PCs without the need for additional hardware conversion.
- The backplane bus of the rack collects data from all monitoring modules of the rack, and a single communication module can read all measurement point data from up to 11 monitoring boards in the entire rack.
- Support hot swapping, replacing modules in the cabinet without power on does not affect the continued protection and alarm functions of other vibration monitoring modules.
- Support PC based MCL View diagnostic software, which can read vibration waveforms online, modify module parameters, view historical alarms, and trace faults, facilitating unit maintenance and debugging.
- The panel LED indicator light intuitively displays the module operation, network link, and backplane bus communication fault status, facilitating quick on-site troubleshooting.
- The B1-5 version is a dedicated configuration version with a fixed protocol register layout, which is directly compatible with existing DCS point tables in existing power plants and petrochemical projects. Replacement of spare parts does not require modification of the upper level program.
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