BCU 370 · Edition 01.19 74
Technical data
Housing made of impact-resistant and heat-resistant
plastic. Plug-in upper section with operating controls
and indicators.
Lower section with connection terminals, grounding
strip and pre-wired neutral bus with spacious wiring
chamber.
1x M25 multiple cable gland, 4x 7 mm cable grommets,
2x M20 multiple cable gland, 2x 7 mm cable grommets,
and loosely enclosed
1x or 2x M16 plastic cable glandr(s) for the ignition
cable(s).
Voltage to inputs, valves, fan, controller enable, actuator
and ignition unit = mains voltage.
Power consumption: approx. 9 VA plus approx. 50 VA for
integrated ignition.
Input voltage of signal inputs:
Rated value 120 V AC 230 V AC
Signal “1” 80–126.5 V 160–253 V
Signal “0” 0–20 V 0–40 V
Input current signal “1”: typ. 2 mA
Output to ignition transformer:
no-switch contacts via semi-conductor.
Contact rating:
Valves: max. 1 A, cos j = 1,
Butterfly valves: max. 1 A, cos j = 1,
Ignition: max. 1 A, cos j = 0.3,
Controller enable signal: max. 1 A, cos j = 1,
the contacts may be loaded with a max. total of 2.5 A,
Fan: max. 3 A, start-up current: max. 6.5 A < 1 s.
The outputs may be loaded with a max. total of 4 A.
Operation and fault signalling contacts:
Dry contact, max. 1 A, 253 V, not internally fused (does
not satisfy the requirements for safe isolation, therefore
not floating).
Reset/Information button: max. number of operating
cycles: 1000.
Fuse in BCU, replaceable, F1: T 5A H, pursuant to
IEC 601272/5.
Fuse for protecting the safety-relevant outputs V1, V2, V3,
Ignition, Controller enable, Open valve, Close valve and
Valve ignition position: 3.15 A, slow-acting, not replaceable.
Permissible UV sensors:
Honeywell Kromschröder models UVS 1, 5, 10 and UVC 1.
Weight: approx. 1.8 kg.
9.1 PROFIBUS DP
Manufacturer ID: 0x08EC.
ASIC type: SPC3.
SYNC and FREEZE-capable.
Baud rate detection: automatic.
Min. cycle time: 0.1 ms.
Diagnostic bytes: 6 (DP Standard).
Parameter bytes: 7 (DP Standard).
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