Product
group
E
An attractive modern designed conductive probe type level control relay in a din rail mounted modular style housing of 1.5 modules width (27mm). The MOD-W-1 is a transformer based conductive probe level control relay and is hence available in dedicated AC voltages only. The sensitivity is potentiometer adjustable 2-100 Kohms, also a potentiometer is fitted to adjust a delay on tripping timer 0.1-10 secs, useful to delay threshold tripping due to fluid movement in tanks. An eight way function switch is provided (designated A to H) to switch between “pump up” and “pump down” modes along with a relay proving function “permanent on” or “permanent off”, the switch will also determine how the adjustable time delay will function. The function positions are as follows:-
A: Pump up, delay on energisation & de-energisation
B: Pump down, delay on energisation & de-energisation
C: Pump up, delay on energisation
D: Pump down, delay on energisation
E: Pump up, delay on de-energisation
F: Pump down, delay on de-energisation
G: Relay proving, permanent on
H: Relay proving, permanent off
Regulation of two levels - pump down mode: The relay energises when the high level probe is reached and deenergises when the level falls below the low level probe.
Regulation of two levels - pump up mode: The relay deenergises when the high level probe is reached and energises when the level falls below the low level probe.
Regulation of one level - pump down mode selected: Connect the maximum and the common terminals together. In this case a single probe only is used and the relay operates when the probe is immersed.
Note: Selection of pump up mode reverses the relay.
Relay proving feature: The front selector switch can be used to “prove” the relay either permanently ON or permanently OFF.
Common probe: A common reference is always required, if the vessel or tank is conductive the chassis of the tank or vessel will suffice. If the tank or vessel is not conductive a third probe is required to act as the common reference.
Supply & Measuring
Supply voltage:
24VAC, 110VAC, 230VAC
24VDC (unisolated)
Supply voltage tolerance: ±15%
Max power consumption: 3VA
Insulation: 2.5KV 50Hz impulse
Sensitivity range: Adjustable 2-100 KOhms
Delay on tripping: Adjustable 1-10secs
Probe supply:
20VAC
5VDC on DC Version
DC auxiliary supply units are possible but the probe supply is an unisolated 5VDC with a consequential risk of a possible electrolysis reaction, especially in solutions with a high mineral or contaminant content.
Max probe current: 2mA
Relay outputs:
Output contacts: SPCO 8Amps/250V AC1
Max breaking capacity: 2000VA
Mechanical life: 30 Million ops
Electrical life: 200K ops at max rated load
General
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
TYPE
MOD-W1 (Din rail SPCO)
COIL VOLTAGE
230VAC
110VAC
24VAC
24VDC
DC auxiliary supply units are possible but the probe supply is an unisolated 5VDC with a consequential risk of a possible electrolysis reaction, especially in solutions with a high mineral or contaminant content.
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