305 SERIES GP TIMER	Distributed by:
MOTOR-DRIVEN ANALOG RESET TIMER	T&C Industrial Controls
Noted for its circuit flexibilty, the 305E also provides the highest accuracy among analog timers. Available for either ON-Delay or OFF-Delay operation, the 305E provides delay, interval or pulse timing function for up to 7 load circuits through two instantaneous and two delayed switches. It features a plug-in design and cycle progress indication.

PRODUCT HIGHLIGHTS

HIGHEST ACCURACY	FASTEST RESET	LONGEST LIFE
Because of its exclusive infinite engagement cluth, the 305 has a repeat accuracy of 0.2%, highest of any timer in its class.	All 305 timers reset to a full-scale setting within 0.1 second, proportionately faster for shorter settings.	With an average mechanical life expectancy of over 5,000,000 operations before the first failure, the 305 is the leader in its class.
PLUG-IN AND DUST-TIGHT DESIGN	CIRCUIT FLEXIBILITY	PILOT LIGHT
By virtue of its true plug-in design, the body of a 305E can be replaced in seconds without disturbing the housing or disconnecting the wiring. Its gasketed dial assembly forms a dust-tight seal against the housing, whether panel or surface-mounted.	All the contacts of its two instantaneous and two delayed load switches are externally accessible at a 14 point terminal block.	A built-in pilot light indicates that the timer is running.
APPROVALS
UL Recognized (AC units only) E24305, CSA 47886.

 

The 305 is a synchronous motor-driven timer with an electrically operated clutch equipped either for ON-Delay or OFF-Delay operation. ON DELAY When power is applied (start signal ON), the clutch solenoid is energized. Two things happen immediately and simultaneously, the instantaneous switches transfer from one set of contacts to the other, and the motor begins to drive the cycle progress pointer toward zero. At the end of the timed period, the pointer trips one of the delayed switches, a brief time later (about 1/2% of full scale), the other delayed switch is tripped, stopping the timer motor but leaving the clutch engaged. The timer does not reset until power to the clutch is removed. OFF DELAY Timing starts when power is removed (start signal OFF), from the spring loaded, normally engaged clutch. The timer is reset when power is restored to the clutch solenoid; simultaneously, the instantaneous contacts are tripped. Action of the delayed contacts is the same as with ON-Delay timers. A power outage stops the motor but does not reset the OFF-Delay 305.

SPECIFICATIONS

MODELS Choice of ON-Delay or OFF-Delay operation. RANGES (AC) 16 standard ranges, from 6 sec. to 60 hrs. at 60 Hz (7 sec. to 70 hrs. at 50 Hz) other ranges on special order. REPEAT ACCURACY AC MODELS: ±0.2% of full scale (For ranges of 60 sec. or less, it may be necessary to run timer motor before start to achive related accuracy). DC MODELS: ±1.75% of full scale at constant ambient temperature and ±15% voltage variation (48, 125, 250V models); ±3.5% of full scale at constant voltage and 32 to 120°F ambient temperature variations (all models). RESET TIME 0.1 sec., full scale. MIN. SETTING 1/60th of range (all models except: 0.3 sec. for 6 sec. model). DIAL DIVISIONS 6 sec., 60 sec., 120 sec., 240 sec., 6 min., 60 min., 120 min., 240 min., 6 hr., and 60 hr. - 120 Dial Divisions 15 sec., 30 sec., 15 min., 30 min., 15 hr., and 30 hr. - 150 Dial Divisions

LIFE EXPECTANCY MECHANICAL: over 5,000,000 operations (average). CONTACTS: 3,000,000 operations under resistive or inductive load of 1A. TIMING MOTOR Synchronous, permanently lubricated. TIMING MODES Single cycle interval ro delay. LOAD SWITCHES INSTANTANEOUS: two, each SPDT; self cleaning, heavy duty silver contacts. DELAYED: two, each SPDT; precision type, silver contacts. CONTACT RATING (non-inductive): 10A @ 120VAC, 5A @ 240VAC, 1/4A @ 115VDC. PILOT LIGHT Wired in parallel with motor; standard with all AC and DC models. TERMINALS 14 screw terminals accessibile at rear; intergral wiring diagram on timer housing (On DC timers, terminal 10 is not available for load circuit use on units rated 48 volts DC or higher.).

HOUSING Plug-in design; completely gasketed, dust tight when surface or panel mounted. POWER REQUIREMENTS AC MODELS: 120 or 240V, 50/60 Hz (all ranges), +10% -15% DC MODELS: 48, 125 or 250V with zener regulations; 28V without zener regulation. AC MODELS: running current - 0.128A (115VAC) inrush current - 0.628A (115VAC) TEMPERATURE RATING 32° to 140°F (0 to 60°C) WEIGHT NET: 2 lb., 6 oz. SHIPPING: 2 lb., 12 oz. MOUNTING ACCESSORIES STANDARD: Hardware is provided to mount timer so that is is dust tight from front of panel. OPTIONAL: Surface mounting with front or rear facing terminals. NEMA 12 or NEMA 1 case for one or two timers.

DIMENSIONS

WIRING

TERMINAL WIRING

ORDERING INFORMATION

Basic Type	Range	Voltage	Arrangement	Setting	Features
305E	101	A	1	0	PX

RANGE - 60 CYCLES - 120 VAC 101 6 Sec.   004 15 Sec.   006 30 Sec.   007 60 Sec.   008 120 Sec.   011 240 Sec.   029 6 Min.   014 10 Min.   015 15 Min.   016 30 Min.   017 60 Min.   018 120 Min.   019 240 Min.   030 6 Hr.   021 15 Hr.   022 30 Hr.   023 60 Hr.

RANGE - 50 CYCLES - 120 VAC 441 7 Sec.   071 18 Sec.   165 35 Sec.   166 70 Sec.   167 140 Sec.   157 280 Sec.   168 7 Min.   049 18 Min.   169 35 Min.   170 70 Min.   171 140 Min.   160 280 Min.   164 7 Hr.   161 18 Hr.   162 35 Hr.   163 70 Hr.

RANGE - DC UNITS 006 30 Sec.   007 60 Sec.   008 120 Sec.   011 240 Sec.   015 15 Min.   016 30 Min.   017 60 Min.   018 120 Min.   019 240 Min.   000 Special

VOLTAGE AND FREQUENCY A 120/60   B 240/60   C 120/50   D 240/50   H 28VDC   J 48VDC   L 125VDC   M 250VDC   K Special

ARRANGEMENT 1 ON-Delay (reset on power interruption) 2 OFF-Delay (non-rest on power interruption) 3 Special	SETTING 0 Knob 5 Key	FEATURES P Basic, standard plug-in unit X Non plug-in timer X Basic standard unit K Special
ACCESSORIES 03052656500   Surface mounting assembly with front facing terminals, less timer (for AC timers and 28 VDC timer only) 03052636400   Surface mounting bracket - rear facing terminals