GE IC693MDL930 8-Point Isolated Relay Output (Form C)

Description

In industrial automation environments where the field devices run on 120 VAC or 240 VAC — motor starters, solenoid valves, pilot lights, dampers, or legacy control circuits — the last thing you want is a separate interposing relay panel just to talk to the PLC. Every extra relay adds cost, panel space, wiring errors, and another failure point that maintenance has to chase at 2 a.m. When you need to switch real plant loads directly, safely, and reliably from a Series 90-30 rack, the cleanest and most proven answer has always been a high-quality isolated relay output module.

This is precisely why the GE IC693MDL930 remains the go-to choice more than 25 years after its introduction. This 4 A, 8-point isolated relay output module gives you eight completely independent Form C (SPDT) contacts — each rated 4 A resistive at 24 VDC/120 VAC/240 VAC and capable of 10 A inrush — with no shared commons whatsoever. You can freely mix 24 VDC brake coils on points 1–2, 120 VAC tower lights on 3–5, and 240 VAC hydraulic valves on 6–8 on the same card without ever worrying about sneak paths or voltage conflicts. For plants still running bulletproof Series 90-30 systems in 2025 — and there are thousands — the GE IC693MDL930 is the universal “talk-to-anything” relay output that eliminates interposing hardware and keeps panels simple and reliable.

The GE IC693MDL930 occupies a single slot in any Series 90-30 baseplate and appears as eight %Q bits to the programmer. Each contact is driven by an optically isolated triac/relay driver with built-in RC snubber across the NO contacts, and every point has its own LED plus a field-replaceable 5 A slow-blow fuse. Because the contacts are truly dry (no leakage current), the module is equally happy switching 5 VDC/10 mA logic signals or full 4 A plant loads. Field power is supplied by the user — there is no internal snubber supply — so backplane draw stays low at only 70 mA when all outputs are energized.

Diagnostics include individual blown-fuse reporting to the PLC fault table (when the optional fuse-blown jumper is installed) and hot-insertion capability in expansion/remote racks. The removable terminal block accepts up to 14 AWG wire and mates with standard IC693ACC316 quick-disconnect cables for ultra-fast maintenance.

Choosing the GE IC693MDL930 means you finally get rid of the interposing relay graveyard. The 4 A rating and true isolation let you drive almost any pilot device found in industry — from 120 VAC Allen-Bradley 100-C contactors to 24 VDC pneumatic manifolds to 240 VAC European motor starters — without external snubbers in most cases. The individual fuses and blown-fuse diagnostics (when jumpered) turn a midnight fuse hunt into a two-minute fix. Maintenance crews love the removable terminal block and the fact that a single welded contact never takes down the other seven outputs.

Over decades of service the IC693MDL930 routinely runs 20+ years with zero relay failures when applied within rating — making it one of the lowest total-cost output modules in the entire 90-30 family.

You’ll find the GE IC693MDL930 energizing pump motor starters in water-treatment plants, switching 240 VAC damper actuators in HVAC skids, driving 120 VAC stack lights on automotive assembly lines, and controlling 24 VDC clutch coils on packaging machines. Municipal utilities use it to interface 90-30 controllers with decades-old 120 VAC annunciator panels. In every case the requirement is absolute voltage flexibility, rock-solid isolation, and contacts that simply do not fail — exactly what the IC693MDL930 has delivered since the mid-1990s.

IC693MDL931 – 8-point isolated 120 VAC-only version (lower cost)

IC693MDL940 – 16-point 2 A Form A (NO) relay (higher density)

IC693MDL930F – Later revision with minor component updates

IC693MDL732 – 12-point 0.5 A 24 VDC transistor output (faster)

IC693MDL741 – 16-point 24 VDC negative-logic transistor

IC693ACC316 – Quick-disconnect cable kit for fast maintenance

IC693ACC301 – Replacement terminal block + fuses

IC693MDL930E – Current production revision

Before installing the GE IC693MDL930, size your field supply and wiring for the actual load — sixteen 4 A contactors starting at once can pull >60 A inrush. Install external RC snubbers or MOVs on highly inductive AC loads >2 A if you want maximum contact life. Torque terminals to 0.8 Nm and consider adding the blown-fuse jumper (JP1–JP8) if you want per-point fuse diagnostics in the fault table. Keep one spare set of fuses and a terminal block on the shelf.

In service, maintenance is visual and fast: a blown fuse lights the red LED and posts a fault instantly. Cycle outputs annually on high-duty points and check contact resistance every few years. Hot-swap replacement takes under two minutes.