Description
Key Technical Specifications
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Model Number: IC697VDR151
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Manufacturer: GE Fanuc (now Emerson)
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Output Points: 64 Form-C relays (non-latching)
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Contact Rating: 2 A resistive @ 250 VAC / 220 VDC; 0.5 A pilot-duty L/R = 40 ms
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Coil Power: 24 VDC bus-derived; 4.0 A from +5 V back-plane (logic only)
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Response Time: 6.5 ms max (0.5 ms coil energise + contact make)
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Isolation: 1500 VAC for 1 min / 250 VAC continuous field-to-logic; 500 V group-to-group
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Connectors: Two 64-pin cables (IC697ACC801/804) to two IC697ACC822 terminal blocks
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Protection: Snubber & MOV on each coil; no per-point fuses—external protection required
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Diagnostics: Green “MODULE OK,” individual red LEDs for coil fault / blown-driver
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Operating Temperature: 0 °C to +60 °C (conformal-coated)
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VME Compliance: ANSI/IEEE 1014-1987, A24/A16, D32/16
IC697VDR151
Field Application & Problem Solved
A Series 90-70 turbine controller doesn’t want sixteen ice-cube relays flopping around—it wants one VME card that can drive 64 contactors, solenoids, and trip coils straight from the rack. Slide IC697VDR151 into any I/O slot, land two cables to the terminal blocks, and you have 64 isolated, LED-indicated, Form-C outputs ready for PLC commands. When the card fails you lose the output group and the unit folds to manual; swap the module (draw-out style), snap the two cables back in, and the loads re-energise exactly as before—no software reload, no re-addressing. Found in every Series 90-70 / RX7i remote drop from gas-turbine Mark V upgrades to steel-mill drives. Value is density: 64 relays in one slot replaces four 16-point modules, a fuse block, and a handful of interposing relays.
A Series 90-70 turbine controller doesn’t want sixteen ice-cube relays flopping around—it wants one VME card that can drive 64 contactors, solenoids, and trip coils straight from the rack. Slide IC697VDR151 into any I/O slot, land two cables to the terminal blocks, and you have 64 isolated, LED-indicated, Form-C outputs ready for PLC commands. When the card fails you lose the output group and the unit folds to manual; swap the module (draw-out style), snap the two cables back in, and the loads re-energise exactly as before—no software reload, no re-addressing. Found in every Series 90-70 / RX7i remote drop from gas-turbine Mark V upgrades to steel-mill drives. Value is density: 64 relays in one slot replaces four 16-point modules, a fuse block, and a handful of interposing relays.
Installation & Maintenance Pitfalls (Expert Tips)
No per-point fuse—external protection mandatory
The module has only coil-driver snubbers; each point needs its own 2 A fast-blow fuse in the field panel. Forget them and a shorted solenoid welds the Form-C contact—then you’re pulling the card.
The module has only coil-driver snubbers; each point needs its own 2 A fast-blow fuse in the field panel. Forget them and a shorted solenoid welds the Form-C contact—then you’re pulling the card.
Cable reversal—coil power on contact pad cooks the trace
The two 64-pin cables (ACC801/804) are keyed alike but pin-outs differ. Land coil power on the normally-closed side and you stuff 24 V into a 220 VDC contact trace—smoke show. Match the white stripe to the silk-screen “COIL” arrow before you push the connector home.
The two 64-pin cables (ACC801/804) are keyed alike but pin-outs differ. Land coil power on the normally-closed side and you stuff 24 V into a 220 VDC contact trace—smoke show. Match the white stripe to the silk-screen “COIL” arrow before you push the connector home.
Coil in-rush > 2 A—contact welds, load stays on
The contact is rated 2 A resistive; a large contactor coil can pull 10 A for 5 ms. If you exceed 2 A steady-state the contact welds and the load can’t drop. Add an interposing relay or size the coil for ≤ 2 A.
The contact is rated 2 A resistive; a large contactor coil can pull 10 A for 5 ms. If you exceed 2 A steady-state the contact welds and the load can’t drop. Add an interposing relay or size the coil for ≤ 2 A.
Conformal coat cracked—salt fog bridges the coil driver
The board is coated, but the 64-pin edge is masked. If the coat cracks, salt bridges 24 V to 5 V and you cook the driver IC. Scrape the salt, hit the edge with 2100-FTG, and re-coat—problem gone for another decade.
The board is coated, but the 64-pin edge is masked. If the coat cracks, salt bridges 24 V to 5 V and you cook the driver IC. Scrape the salt, hit the edge with 2100-FTG, and re-coat—problem gone for another decade.
IC697VDR151
Technical Deep Dive & Overview
IC697VDR151 is a 64-relay output slice frozen in 1990s VME silicon. A 5 V logic interface latches the CPU word, drives 64 miniature relays, and reports coil/status back over the VME bus. Because the module is group-isolated and non-latching you can swap it hot—just kill the 24 VDC coil supply first or you’ll arc-weld the 64-pin connectors. Treat the Form-C contacts like precision switches and the card will keep the contactors pulling for another thirty years
IC697VDR151 is a 64-relay output slice frozen in 1990s VME silicon. A 5 V logic interface latches the CPU word, drives 64 miniature relays, and reports coil/status back over the VME bus. Because the module is group-isolated and non-latching you can swap it hot—just kill the 24 VDC coil supply first or you’ll arc-weld the 64-pin connectors. Treat the Form-C contacts like precision switches and the card will keep the contactors pulling for another thirty years
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