ABB DTCC901B 61430001-FU Relay Digital Output Module

Description

Hardware & Electrical Specifications

• Model：DTCC901B
• Part Number：61430001‑FU
• Module Type：Digital Relay Output Module
• Channel quantity：8 channels, each SPDT (NO / NC / COM) dry contact
• Isolation：Every 2 channels form one isolation group, group‑to‑group opto‑isolation; channels to back‑plane bus galvanic isolation
• Rated load voltage：AC 250V；DC 30V
• Continuous rated current per channel：5A resistive load
• Peak short‑time current：10A, duration ≤1s
• Contact mechanical life：≥1 000 000 cycles (resistive load)；≥100 000 cycles (inductive load)
• Output response time：≤10 ms (from command to relay action)
• Built‑in fuse：6A /250V per channel, drawer‑type replaceable fuse
• Surge protection：Varistor parallel on each contact (AC275V / DC33V); support external RC snubber circuit for inductive load
• Power supply：24 V DC (‑15% ~ +10%) supplied by rack back‑plane
• Power consumption：max 4.2 W
• Insulation resistance：≥100 MΩ @500 V DC
• Dielectric strength：2.5 kV AC between field side and back‑plane logic side

Environmental Specifications

• Operating temperature：0 ℃ ~ +55 ℃
• Storage temperature：‑20 ℃ ~ +70 ℃
• Relative humidity：5%‑95% non‑condensing
• Protection class：IP20 (module internal, cabinet installation)
• Anti‑interference：meet IEC 61000‑6‑2 industrial EMC standard
• Certifications：CE, UL

Mechanical Data

• Installation：Slot‑in mounting on Advant OCS standard rack, mechanical latch locking
• Terminal type：Screw terminal, suitable for 0.75 mm²‑4 mm² copper wire
• Dimension：120 mm × 110 mm × 45 mm
• Weight：approx 0.35 kg

Main Functions

1. 8‑channel SPDT relay output：Each channel provides normally‑open and normally‑closed contacts, flexible for interlock, backup circuit design. Direct drive contactor coil, solenoid valve, local indicator light without extra intermediate relay。
2. Contact actual status feedback：The module reads real relay contact position and sends back to DCS controller, realize closed‑loop monitoring “control command‑actual execution status”. Prevent hidden fault that command sent but relay not act.
3. Per‑channel self‑diagnosis：Detect fuse blown, output over‑current, internal relay fault. Fault information includes channel number and fault type, uploaded to control system for alarm.
4. LED status indication per channel：
   • Green ON：contact closed
   • Green OFF：contact open
   • Red flash：channel fault (fuse blow / relay failure)
5. Parameter configurable via Control Builder software：Support output delay setting, fault latch / auto‑reset mode, channel invert logic.
6. Group‑wise galvanic isolation：Reduce cross‑channel interference when mixing AC and DC field loads.
7. Easy maintenance：Drawer‑type fuses can be replaced without removing whole module from rack.

Installation & Wiring Requirements

1. Install into standard Advant OCS rack slot, latch click to lock; back‑plane bus complete power and communication automatically.
2. Keep sufficient cabinet ventilation, avoid corrosive gas, conductive dust, strong magnetic field near module.
3. For inductive load (solenoid, contactor coil), install external RC absorption circuit on load side to suppress back‑EMF and extend relay service life.
4. Strictly follow load voltage & current rating; do not exceed 5A continuous current for each channel.
5. Cabinet grounding must comply with industrial control grounding specification to guarantee isolation performance and anti‑interference capability.
6. Wiring torque for screw terminals: 0.8‑1.2 N·m.