Technical Q&A
Q1: What is the difference between IS200WNPSH1A and IS200WNPSH1AAA?
A1: The “AAA” variant adds conformal coating and extended-temperature screening to the base board IS200WNPSH1A, widening storage temperature to –40 … +85 °C for marine or high-humidity environments.
Q2: What is the main function of this board in a Mark VI system?
A2: It supplies isolated +28 V and –28 V wetting power to contact-input cards and feeds the actual voltage value back to the controller, ensuring reliable dry-contact detection.
Q3: What is the output capability?
A3: 200 mA max per 28 V rail, ripple < 50 mV pp—enough for about 40 typical dry-contact loops.
Q4: What are the input-bus requirements?
A4: 28 VDC nominal, 20 – 32 V transient tolerated; on-board TVS and diode-OR allow dual-power redundancy.
Q5: Is hot-swap supported?
A5: No. Power must be off for 5 min before insertion/withdrawal to prevent back-plane arcing.
Q6: How can I confirm the board is healthy?
A6: Front dual-color LEDs: “+OK” green = +28 V good, “–OK” green = –28 V good; either LED off sends a fault bit to the controller.
Q7: Dimensions & weight?
A7: 123 × 129 × 30 mm, approx. 0.45 kg, occupies one standard Mark VI daughter-card slot.
Q8: Which countries or regions do you ship to?
A8: We ship worldwide.
Q9: How do you ship the goods?
A9: By air courier—DHL, TNT, UPS or FedEx.
Q10: What is your delivery time?
A10: In-stock items: 2–3 business days.
Out-of-stock items: to be negotiated.
Contact Now
Company: PLC Autocontroller
E-mail: ab@mooreplc.com
Phone/WhatsApp: +86-18106909650
WeChat: dcsfcs
Attn: May
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