ServerTech’s Fail-Safe transfer switches supply single-power equipment with dual, redundant power sources.
The Sentry Fail-Safe Transfer Switch (FSTS) features two input power feeds, from separate AC circuits, to supply single-feed equipment with dual, redundant power sources. A primary AC circuit provides power to the connected device(s). With this rack automatic transfer switch, if the primary source becomes unavailable for whatever reason, then the Sentry FSTS auto-switches to the secondary power source to support the connected equipment.
The transfer from one power source to the other is seamless to the connected equipment with this rack automatic transfer switch. When the secondary power source is available, an interruption of the primary power source will not affect the equipment’s uptime or performance.
Sentry Fail Safe Transfer Switch (FSTS)
Also exclusive to the FSTS is the ability to select the high voltage (208-230V) or low voltage (110-120V) operating range of the AC power source. Use the Sentry FSTS as a universal power transfer switch for all cabinets and servers, regardless of the voltage. To apply power, just remove a panel and then choose the appropriate voltage range for the Fail-Safe Transfer Switch.
Server Technology Fail-Safe Transfer Switch Comparison
| PTTS | C Series | CS Series | CW Series | |
|---|---|---|---|---|
| Function | Basic (Not networked) | Metered (Not networked) | Smart (Networked) | Switched (Networked) with outlet ON/OFF/Reboot control |
| Total Number of Outlets | (8) IEC C13 | 200-240V: (8) IEC C19 200-240V: (16) IEC C13 120V: (16) NEMA 5-20R |
(2) IEC C19 | 120 V: (16) NEMA 5-20R 200-240 V: (16) IEC C13 |
| Power Distribution Under Normal Operation |
Primary selector switch to supply power to all 8 outlets | Load sharing. Input A powers Outlet A, Input B powers Outlet B | Load sharing. Input A powers Outlet A, Input B powers Outlet B | Load sharing. Input A powers Outlet A, Input B powers Outlet B |
| Input Power Cord | Sold separately | 16/20 A versions: sold separately 30/32 A versions: hardwired |
16/20 A version: sold separately 30/32 A version: hardwired |
16/20 A version: sold separately 30/32 A version: hardwired |
| Input Power Options | 100-240V; 20A (user accessible selector switch) |
120 V; 20 A or 30 A 208 V; 20 A or 30 A 230 V; 16 A or 32 A |
120 V; 20 A or 30 A 208 V; 20 A or 30 A 230 V; 16 A or 32 A |
120 V; 20 A or 30 A 208 V; 20 A or 30 A 230 V; 16 A or 32 A |
| Phase Synchronization Required? |
Yes | No | Yes | Yes |
| Form Factor | 1U, Horizontal Mount | 2U, Horizontal Mount | 1U, Horizontal Mount | 2U, Horizontal Mount |
| Temperature/Humidity Sensors * | No | No | Up to 2 (P/N EMTH-1-1) | Up to 2 (P/N EMTH-1-1) |
| Input Current Monitoring | No | Yes | Yes | Yes |
| Input Current LEDs | No | One per input feed | One per input feed | One per input feed |
| Expansion Unit to Share One IP Address |
No | No | Yes | Yes |
| Branch Circuit Protection | Internally fused | Internally fused | Internally fused | User-resettable breakers |
* Environmental monitoring sensors sold separately.
Product List
| Model # | Total Outlets | Input Power Capacity | Input Nominal Voltage | Input Current | Input Current Rated | Phase | Plug Type | Branch Monitoring | Outlet Monitoring | Dimensions | Mounting | PRO2 | Input Monitoring | Alt Phase |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| C-16HFE-P32 | 16 | 7.3 | 230 | 32 | 32 | 1-Phase (L-N) | IEC 230V/32A 2P+PE 6Hr | None | None | 17.0 x 3.5 x 10.0 in. (254.0 x 89.0 x 432.0 mm.) | 2U Horizontal | CDU1 | Current (A) | No |
| C-16HF2-L30 | 16 | 5 | 208 | 30 | 24 | 1-Phase (L-L) | NEMA L6-30P | None | None | 17.0 x 3.5 x 10.0 in. (254.0 x 89.0 x 432.0 mm.) | 2U Horizontal | CDU1 | Current (A) | No |
| C-16HF1-L30 | 16 | 2.8 | 120 | 30 | 24 | 1-Phase (L-N) | NEMA L5-30P | None | None | 17.0 x 3.5 x 10.0 in. (254.0 x 89.0 x 432.0 mm.) | 2U Horizontal | CDU1 | Current (A) | No |
| C-8HF2-L303 | 8 | 5 | 208 | 30 | 24 | 1-Phase (L-L) | NEMA L6-30P | None | None | 17.0 x 3.5 x 10.0 in. (254.0 x 89.0 x 432.0 mm.) | 2U Horizontal | CDU1 | Current (A) | No |
| C-16HF2-C20 | 16 | 3.3 | 208 | 20 | 16 | 1-Phase (L-L) | IEC C20 200-240V Inlet | None | None | 17.0 x 3.5 x 10.0 in. (254.0 x 89.0 x 432.0 mm.) | 2U Horizontal | CDU1 | Current (A) | No |
| C-16HF1-C20 | 16 | 1.9 | 120 | 20 | 16 | 1-Phase (L-N) | IEC C20 100-120V Inlet | None | None | 17.0 x 3.5 x 10.0 in. (254.0 x 89.0 x 432.0 mm.) | 2U Horizontal | CDU1 | Current (A) | No |
| C-8HF2-C203 | 8 | 3.3 | 208 | 20 | 16 | 1-Phase (L-L) | IEC C20 200-240V Inlet | None | None | 17.0 x 3.5 x 10.0 in. (254.0 x 89.0 x 432.0 mm.) | 2U Horizontal | CDU1 | Current (A) | No |
| PTTS-H008-0-02M | 8 | 3.3 | 208 | 16 | 16 | 1-Phase (L-L) | IEC C20 100-240V Inlet | None | None | 17.2 x 1.75 x 8.0 in. (204.0 x 45.0 x 437.0 mm.) | 1U Horizontal | CDU1 | None | No |
| C-8HFE-C203 | 8 | 3.6 | 230 | 16 | 16 | 1-Phase (L-N) | IEC C20 200-240V Inlet | None | None | 17.0 x 3.5 x 10.0 in. (254.0 x 89.0 x 432.0 mm.) | 2U Horizontal | CDU1 | Current (A) | No |
| C-16HFE-C20 | 16 | 3.6 | 230 | 16 | 16 | 1-Phase (L-N) | IEC C20 200-240V Inlet | None | None | 17.0 x 3.5 x 10.0 in. (254.0 x 89.0 x 432.0 mm.) | 2U Horizontal | CDU1 | Current (A) | No |
| C-8HFE-P323 | 8 | 7.3 | 230 | 32 | 32 | 1-Phase (L-N) | IEC 230V/32A 2P+PE 6Hr | None | None | 17.0 x 3.5 x 10.0 in. (254.0 x 89.0 x 432.0 mm.) | 2U Horizontal | CDU1 | Current (A) | No |
| CW-16HFEA452 | 16 | 3.6 | 230 | 16 | 16 | 1-Phase (L-N) | IEC C20 200-240V Inlet | Sense | None | 17.2 x 3.5 x 10.0 in. (254.0 x 89.0 x 437.0 mm.) | 2U Horizontal | CDU1 | Current (A) | No |
| CW-16HF2C452 | 16 | 5.0 | 208 | 30 | 24 | 1-Phase (L-L) | NEMA L6-30P | Sense | None | 17.2 x 3.5 x 10.0 in. (254.0 x 89.0 x 437.0 mm.) | 2U Horizontal | CDU1 | Current (A) | No |
| CW-16HFEK452 | 16 | 7.3 | 230 | 32 | 32 | 1-Phase (L-N) | IEC 230V/32A 2P+PE 6Hr | Sense | None | 17.2 x 3.5 x 10.0 in. (254.0 x 89.0 x 437.0 mm.) | 2U Horizontal | CDU1 | Current (A) | No |
| CW-16HF2A452 | 16 | 3.3 | 208 | 20 | 16 | 1-Phase (L-L) | IEC C20 200-240V Inlet | Sense | None | 17.2 x 3.5 x 10.0 in. (254.0 x 89.0 x 437.0 mm.) | 2U Horizontal | CDU1 | Current (A) | No |
| CS-2HFEK222A3 | 2 | 7.3 | 230 | 32 | 32 | 1-Phase (L-N) | IEC 230V/32A 2P+PE 6Hr | None | None | 17.0 x 1.75 x 7.0 in. (178.0 x 45.0 x 432.0 mm.) | 1U Horizontal | CDU1 | Current (A) | No |
| CS-2HFEA222A3 | 2 | 3.6 | 230 | 16 | 16 | 1-Phase (L-N) | IEC C20 200-240V Inlet | None | None | 17.0 x 1.75 x 7.0 in. (178.0 x 45.0 x 432.0 mm.) | 1U Horizontal | CDU1 | Current (A) | No |
| CS-2HF2A222A3 | 2 | 3.3 | 208 | 20 | 16 | 1-Phase (L-L) | IEC C20 200-240V Inlet | None | None | 17.0 x 1.75 x 7.0 in. (178.0 x 45.0 x 432.0 mm.) | 1U Horizontal | CDU1 | Current (A) | No |
| CS-2HF2C222A3 | 2 | 5.0 | 208 | 30 | 24 | 1-Phase (L-L) | NEMA L6-30P | None | None | 17.0 x 1.75 x 7.0 in. (178.0 x 45.0 x 432.0 mm.) | 1U Horizontal | CDU1 | Current (A) | No |
| CW-16HF1A452 | 16 | 1.9 | 120 | 20 | 16 | 1-Phase (L-N) | IEC C20 100-120V Inlet | Sense | None | 17.2 x 3.5 x 10.0 in. (254.0 x 89.0 x 437.0 mm.) | 2U Horizontal | CDU1 | Current (A) | No |
| CW-16HF1B452 | 16 | 2.8 | 120 | 30 | 24 | 1-Phase (L-N) | NEMA L5-30P | Sense | None | 17.2 x 3.5 x 10.0 in. (254.0 x 89.0 x 437.0 mm.) | 2U Horizontal | CDU1 | Current (A) | No |
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