GE IC693ACC307 Expansion I/O Bus Terminator Plug

Description

Basic Hardware Information

‑ Connector form: 25‑pin female D‑Sub connector, internal integrated precision termination resistor pack ‑ Supported expansion cables: IC693CBL302, IC693CBL314 ‑ Maximum total expansion cable length: 15 m (50 ft) ‑ Power consumption: Passive device, no external power supply required ‑ Mechanical: Compact D‑Sub plug‑in housing; weight approx 0.05‑0.14 kg; no DIN‑rail mounting required; directly plug into baseplate expansion port; non‑hot‑swappable, perform plug‑unplug under rack power‑off condition ‑ Operating ambient temperature: 0 ℃ ~ +60 ℃; storage temperature ‑40 ℃ ~ +85 ℃; relative humidity 5‑95 % non‑condensing ‑ Safety certification: UL, cUL, CE ‑ Handling note: ESD‑sensitive component; anti‑static wrist strap required during handling ‑ Compatibility: Only for Series 90‑30 PLC expansion‑I/O bus; cannot apply to Genius bus or Series 90‑70 expansion interface. Only one terminator shall exist within one expansion chain, install on final rack only.

Core Functions & Features

1. Provides correct impedance termination for Series 90‑30 parallel expansion‑I/O bus, eliminates high‑speed signal reflection and ringing on multi‑rack daisy‑chain expansion topology, guarantees stable data transmission between CPU and remote expansion baseplates。
2. Passive hardware device, no configuration software setting needed; physical plug‑in completes termination function.
3. Restricts signal‑reflection‑induced faults: intermittent expansion‑rack offline, random module fault reporting, PLC scan time overtime, sporadic I/O data distortion.
4. Revision‑A unit is drop‑in replacement for base IC693ACC307; no modification for wiring and system structure.

On‑site Installation & Commissioning Notes

1. Cut off whole PLC rack power before plugging or removing IC693ACC307; apply anti‑static protection.
2. In multi‑rack expansion daisy‑chain system, install this terminator only on the expansion D‑Sub port of the last expansion baseplate. Do not install on CPU main‑rack port or intermediate‑rack port; multiple terminators on same chain will cause bus communication failure。
3. Tighten D‑Sub fixing screws to prevent vibration‑induced loose contact. Arrange expansion‑cable routing separately from high‑voltage power cables to reduce EMI interference.
4. After completing whole expansion‑chain wiring and terminator installation, power‑on PLC, verify all expansion‑rack modules are fully recognized inside programming software, check for expansion‑bus fault bits.
5. Replacement note: Generic third‑party D‑Sub plug cannot substitute for IC693ACC307, internal resistor network is mandatory. After replacement, double‑check installation position (last rack only), and perform full‑point I/O validation test.

Common On‑site Abnormal Conditions

‑ Intermittent expansion‑rack drop‑out: Missing terminator plug; terminator installed on intermediate rack; loose D‑Sub connector; damaged internal resistor inside terminator. ‑ Some expansion‑I/O modules cannot be recognized: Wrong terminator position, damaged expansion cable, D‑Sub connector pin damage on baseplate. ‑ Sporadic I/O data jitter / random module fault alarms: Signal reflection caused by missing or defective terminator, heavy EMI interference on expansion‑cable route. ‑ Whole expansion‑chain no communication: Two terminators fitted on same expansion chain simultaneously. ‑ Terminator physical damage: Surge voltage conducted through expansion cable, ESD impact on D‑Sub interface.