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Em đang làm tự động hóa của hãng Invensys dùng module digital output là dạng Relay Module RLY4
nhưng không có dàn rơle trung gian cách ly module DO và khởi động từ 220VAC
mong các anh chỉ xem nhược điểm cho em với em cảm ơn
datasheet:
Relay Module RLY4
The RLY4 module "output" contains four power relay contacts capable of working at 2A,
250Vac. Otherwise, module operation is exactly the same as the other logic output modules.
Channel Types: On/Off, TPO, Valve Raise/Lower
Number of channels: 3 N/O (normally open contact), 1 C/O (changeover contacts)
RLY4 Channel Specification:
Voltage rating: <264V rms sine wave, <200Vdc
AC current: 2A at 0 to 264Vac, resistive load
AC derating: Reduce max current rating 10% for load factor of 0.5
DC current: 2A at <50Vdc
DC derating: Max current reduces to 0.5A at 200Vdc
Wetting Voltage: 12V min
Wetting Current: 100mA min
Snubber: 100Ω + 22nF (see note) across all N/O contacts.
RLY4 General Features:
Isolation channel-
channel:
Functional (basic insulation), 264 Vac max.
Isolation to system: Reinforced (double insulation), 264Vac max
Note: the snubber circuit may be removed by cutting the resistors off the board.
Note: "wetting" power: lower voltages or currents may be switched at reduced contact life.
nhưng không có dàn rơle trung gian cách ly module DO và khởi động từ 220VAC
mong các anh chỉ xem nhược điểm cho em với em cảm ơn
datasheet:
Relay Module RLY4
The RLY4 module "output" contains four power relay contacts capable of working at 2A,
250Vac. Otherwise, module operation is exactly the same as the other logic output modules.
Channel Types: On/Off, TPO, Valve Raise/Lower
Number of channels: 3 N/O (normally open contact), 1 C/O (changeover contacts)
RLY4 Channel Specification:
Voltage rating: <264V rms sine wave, <200Vdc
AC current: 2A at 0 to 264Vac, resistive load
AC derating: Reduce max current rating 10% for load factor of 0.5
DC current: 2A at <50Vdc
DC derating: Max current reduces to 0.5A at 200Vdc
Wetting Voltage: 12V min
Wetting Current: 100mA min
Snubber: 100Ω + 22nF (see note) across all N/O contacts.
RLY4 General Features:
Isolation channel-
channel:
Functional (basic insulation), 264 Vac max.
Isolation to system: Reinforced (double insulation), 264Vac max
Note: the snubber circuit may be removed by cutting the resistors off the board.
Note: "wetting" power: lower voltages or currents may be switched at reduced contact life.
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