ServerTech Sentry Fail Safe Transfer Switch

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)

Unique to the Sentry FSTS is the ability to designate which power source is primary and which is secondary. With the Primary Select switch, a power engineer simply toggles the switch from primary to secondary, which transfers the load from one power feed to the other. Now, the “secondary” becomes “primary” and the power engineer can safely work on the first power source without dropping power to the connected equipment.

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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