DDC Panels
Tor Chiller Plant Panel
176 points of control and a local HMI in one factory-built panel. It sequences chillers, sets the pumps and towers, and runs Tor Shield Chiller Plant Manager across the whole plant.
What it runs
- Chiller staging and sequencing on actual plant load
- Chilled water supply temperature reset
- Condenser water temperature optimisation, kept within each chiller OEM's recommended limits
- Secondary chilled water and condenser water pump speed control through VFDs
- Live IKW for the whole plant, and kW/TR for each chiller
- Alarms, trends and reports in Tor Shield
Primary pumps stay with the chiller or a separate starter.
What's inside
- Tor Cygnus 901 controller and 4 Cygnus 902 I/O expansion modules
- Local HMI for on-site viewing and operation
- Mean Well 5 V and 24 V DIN-rail power supplies
- Built-in 5 V mini UPS that keeps the controller powered through short outages
- 2-pole 16 A MCB and switched 3-pin service socket
- 10 interposing relays (8× 230 V AC, 2× 24 V DC) on plug-in bases
- Feed-through field terminals
At a glance
| Item | Specification |
|---|---|
| Controller | Tor Cygnus 901 + 4× Cygnus 902 expansion |
| Total I/O | 176: 124 DI, 10 relay DO, 34 AI, 8 AO (0–10 V) |
| Relayed outputs | 8× 230 V AC, 2× 24 V DC |
| Analog input types | 4–20 mA, resistive and voltage |
| Field protocols | Modbus RS485, BACnet, BLE |
| Chiller integration | Reads chiller controllers over BACnet or Modbus |
| Local HMI | Included |
| Backhaul | Ethernet, Wi-Fi or GSM |
| Deployment | Cloud or on-premise |
Relay count stays at 10 (8× 230 V AC, 2× 24 V DC) when expansion modules are added.
Our IBMS customers
