Switching units BK-... (SENS Measurement System)
Application
Switching units (fig. 1 … 3) are designed to control actuators by switching relay contacts using signals of “SENS&rdquo system devices. Each relay of switching unit can be programmed for triggering using single or multiple values of measured parameters of single or multiple sensors thus making possible creation of automatic control, blocking and signaling algorithm. Programming of switching units is made using MS-K-500-… signaling device or PC with “Configuration” program.
Design
Switching units have different number of relays, power supply voltage and housing design. Switching unit in plastic housing have explosion-proof modification in metal housing with “VZ” index (fig. 1 … 3). List and technical specifications of switching units are shown in table 1, connection diagrams are shown in fig. 4 … 7.
Connection diagrams
Technical parameters (table 1)
|
Modifications* Parameter |
БК-2Р |
БК-220В-5Р |
БК-12В-5Р БК-24В-5Р |
БК-220В-8Р |
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Number of relays |
2 |
5 |
8 |
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Power supply voltage, V |
6…15 (SENS line) |
~220 V+-10%, 50+-3 Hz |
12…16 (20…28) |
~220 V+-10%, 50+-3 Hz |
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Power consumption, W, not more |
0.36 |
1 |
1.3 (2.4) |
1.5 |
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Current consumption with Upow = 9V, mA, not more |
40 |
- |
- |
- |
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Load parameters of relay contacts |
<250V, 6A |
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Housing material
|
BK-… |
shock-proof polystyrene |
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BK-… -VZ |
steel 09Mn2Si |
aluminum alloy |
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Explosion protection marking
|
BK-… |
- |
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BK-… -VZ1 |
1Ex db IIB T4 Gb |
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Ambient temperature range, °С |
BK-… |
-30… 50 |
5 … 50 |
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BK-… -VZ |
-50 … 60 |
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Климатическое исполнение по ГОСТ 15150 |
BK-… |
УЗ |
УХЛ4 в диапазоне температур от 5 °С до +50 °С |
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BK-… -VZ |
УХЛ1 в диапазоне температур от-50 °С до+60 °С |
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Water and dust ingress protection degree as per IEC 60529 |
BK-… |
- |
IP66 |
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BK-… -VZ |
IP66 |
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Overall dimensions, mm |
BK-… |
70,4x90x17,5 |
132x97x57 |
165x97x57 |
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BK-… -VZ |
124x123x114 |
220x177x85 |
274x168x66 |
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Average lifetime, years, not less |
10 |
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* including modification «VZ»
Designation
Designation of switching units:
BK-2R, BK-2R-VZ-A-B;
BK-12V-5R-C, BK-12V-5R-VZ-B, BK-24V-5R-V, VK-24V-5R-VZ-B, BK-220V-5R-V, BK-220V-5R-VZ-B;
BK-220V-8R-C, BK-220V-8R-VZ-B,
where:
A - housing, cover, parts of cable fittings are made of corrosion-resistant steel: no designation - made of steel 09G2S (Steel 20); SS - made of 12Cr18Ni10Ti steel.
Б - kitting of cable fittings with cable protective sheath mounting devices: no designation no mounting devices; UKM10 / UKM12 / UKBK15 / UK16 - with corresponding mounting device.
C - availability of 35 mm DIN rail mounting clamp: no designation - no clamps, DIN - clamps available.