UNI-1B (spco) & UNI-4B (4pco)


  • Din rail mounted
  • Modern modular design
  • Width 27mm (1.5 modules)
  • Unique product
  • SPCO & unique 4PCO versions
  • Multi voltage 12-250VACDC
  • Range selectable
  • 10 second proving function
  • Daily, weekly, fortnightly, monthly changeover
  • Dual LED indication
  • CE marked
Download data sheet

An attractive modern designed “duty changeover reIay” in a din rail mounted modular style housing of 1.5 modules width (27mm). A selector switch is provided to select one of four different fixed time ranges from 1 day to 1 month, (there is also a 10 second “circuit proving” setting). This is an ideal simple product to achieve a daily, weekly, fortnightly or monthly duty changeover on pumps, fans and similar equipment especially in the HVAC and pumping industry. A green supply on LED is featured along with a red LED to indicate relay output status. All terminal details and the function information along with the CE mark is clearly marked on the sides of the housing.

Initiated by supply on terminals A1 & A2. Timing commences to energise relay contacts (pause first) and then times to de-energise relay contacts. This cycle continues so long as the supply is connected. The time period on both energisation and de-energisation (T1 & T2) are both fixed. If the supply is removed at any point within the cycle any remaining time will be cancelled and if the relay contacts are energised they will de-energise.


Time ranges (fixed): 1 day, 7 days, 14 days, 30 days

Proving function (fixed): 10 sec

Repeat accuracy: ±0.5% of set value

Reset time: Max 100mSec

Relay outputs:

Output contacts:
UNI-1B 16Amps/250V AC1
UNI-4B 8Amps/250V AC1

Max breaking capacity:
UNI-1B 4000VA
UNI-4B 2000V

Mechanical life: 30 Million ops

Electrical life: 200K ops at max rated load

Supply voltage:

Supply voltage: 12-250V AC/DC

Max consumption: 5mA

Insulation: 2.5KV 50Hz impulse


Operating temperature: -20°C to +65°C

Storage temperature: -20°C to +65°C

Max cable size: 2.5mm

CE marked: Yes

In accordance with:
EN61000-6-1: 2007
EN61000-6-3: 2007
EN61010-1: 2002

Housing material: Polycarbonate, Auto extinguishable to UL 94 V-0

Position 1: 10 secs fixed
Position 2: 1 day fixed
Position 3: 7 days fixed
Position 4: 14 days fixed
Position 5: 30 days fixed




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