Application Scenarios
Picture a chemical processing plant running a Honeywell HC900 hybrid controller where reactor feed-line solenoid valves demand 230 VAC actuation, but the controller’s standard output cards supply only low-voltage logic. Adding interposing relays for every valve would mean extra panel wiring, more failure points, and higher installation labor. The Honeywell 621-2200RC solves this directly: its eight isolated relay contacts wire straight to the solenoid coils, eliminating an entire row of interposing relays across two reactor trains. Maintenance technicians confirm each channel’s status at a glance through the per-channel LED indicators, and the dry-contact design ensures a failed module can never backfeed voltage into the sensitive controller backplane. For plants still running legacy Honeywell TDC 2000 or TDC 3000 systems, the module is equally valuable as a critical spare for burner management and emergency shutdown applications, where a fuel gas shutoff valve must be de-energized the moment a flame failure signal appears.
Parameter
| Main Parameters | Value / Description |
|---|---|
| Product Model | Honeywell 621-2200RC |
| Manufacturer | Honeywell Process Solutions |
| Product Category | Digital AC Output Module (Relay Type) |
| Product Series | 621 Universal I/O System / IPC 620 Series |
| Compatible Systems | IPC 620, IPC 621 PLC; HC900 hybrid controller; TDC 2000/3000 legacy platforms |
| Number of Outputs | 8 channels, independent |
| Output Type | Electromechanical relay, Form A (SPST-NO), normally open |
| Nominal Output Voltage | 230 VAC |
| Operating Voltage Range | 195–250 VAC |
| Maximum Switching Voltage | 250 VAC |
| Current Rating per Point | 2 A maximum (resistive load) |
| Current Rating per Common | 6 A maximum |
| Total Module Current | 8 A maximum |
| Maximum Switching Power | 500 VA (AC) / 60 W (DC) |
| Common Configuration | CH1–4 share COM A; CH5–8 share COM B |
| Isolation | Relay coil-to-contact galvanic isolation; channels share common (not isolated from each other) |
| Response Time | Approximately 10–15 ms pick-up and drop-out |
| Status Indication | Per-channel LED, illuminated when output is active |
| Backplane Power | +5 VDC logic and +24 VDC relay-coil power from rack backplane |
| Field Wiring | Removable screw-terminal block; module withdrawable without disturbing field conductors |
| Mounting | Direct insertion into IPC 620 / HC900 I/O rack |
| Operating Temperature | -25 °C to +70 °C (industrial grade) |
| Storage Temperature | -40 °C to +85 °C |
| Compliance | CE compliant (“C” suffix); meets IEC 61131-2 and relevant industrial safety standards |
| Lifecycle Status | Legacy product; supplied through new-surplus, refurbished, and repair channels |
