GE IC694MDL655 PACSystems RX3i 32‑Point 24VDC Discrete Input Module

Description

Hardware & Electrical Specifications

‑ Model：IC694MDL655 ‑ Part Number：IC694MDL655 ‑ Module Type：RX3i 32‑Channel 24VDC Discrete Input Module ‑ Mounting：Plug‑in any slot on RX3i universal backplane, local main rack or expansion rack ‑ Backplane power：5 VDC @140 mA drawn from rack backplane ‑ Field input：  • Rated voltage：24 VDC, operating range 10‑30 VDC  • Input current：7 mA typical @24VDC per channel  • Logic selection：Each group hardware jumper select POS(positive/sourcing) / NEG(negative/sinking)  • ON threshold：≥10 VDC  • OFF threshold：≤5 VDC  • Response time：ON/OFF max 2 ms ‑ Isolation：Field‑to‑backplane 1500 VAC 1‑minute withstand; group‑to‑group isolation; no isolation between channels within same group ‑ Termination：Requires separate 36‑pin terminal block IC694TBB032 / IC694TBS032 ‑ Diagnostics：Module self‑diagnosis; channel input status feedback to CPU register ‑ PCB treatment：Conformal coated for dust‑moisture‑corrosion resistance ‑ Compatibility note：Cannot run standalone; field 24VDC power must be externally supplied; jumper setting must match field sensor type; full discrete‑input loop simulation test mandatory after replacement。

Environmental Specifications

‑ Operating temperature：0 ℃ ~ +60 ℃ ‑ Storage temperature：‑40 ℃ ~ +85 ℃ ‑ Relative humidity：5%‑95% non‑condensing ‑ Installation location：Indoor industrial control cabinet, IP20 ‑ EMC compliance：IEC 61000‑6‑2 ‑ Certifications：CE, UL Class I Div 2 hazardous‑location certification

Mechanical Data

‑ Weight：approx 0.24 kg ‑ Dimension：RX3i single‑slot module form‑factor ‑ Handling note：ESD‑sensitive input circuit; pay attention to group jumper setting before power‑on; separate signal cables from high‑power cables

Main Functions

1. Collect field discrete signals: proximity switches, limit switches, push‑buttons, relay auxiliary contacts; convert field 24VDC on/off signal into digital data for RX3i CPU.
2. Four independent groups, each group can switch sourcing / sinking logic by hardware jumper, adapt to different sensor wiring schemes.
3. Real‑time data exchange with CPU via backplane bus, upload 32‑point input status to PLC discrete‑input register.
4. LED status indication on front panel:   ‑ Green P/S OK：Module 5V backplane power normal   ‑ Green MODULE OK：Module hardware & configuration normal   ‑ 32 individual green channel LED：Real‑time status indicator for each input channel

Installation & Wiring Requirements

1. Cut off PLC rack power and field 24VDC input power before replacement. Hot‑swap is forbidden. Strict anti‑static protection when handling module.
2. Insert IC694MDL655 fully into backplane slot and lock latch; install matched terminal block; set group POS/NEG jumpers according to field sensor type.
3. Field signal wiring strictly follow GE RX3i hardware manual; use shielded twisted‑pair for long‑distance signal; separate input signal cables from high‑power cables; reliable protective‑ground connection.
4. After replacement：power‑on rack and field 24VDC; verify P/S OK、MODULE OK and channel LED status; download hardware configuration; perform full‑channel input trigger test.
5. Replacement note: Double‑check jumper logic matches field device; avoid wrong jumper causing signal abnormal; full‑system commissioning test mandatory before unit put‑into‑service。