Product Overview

The ABB 086348‑001​ is a legacy-numbered digital output module in the ABB Advant OCS and System 800xA S800 I/O families, electrically and functionally equivalent to the current S800 catalog item SD834​ — a 32‑channel, 24 VDC sourcing (PNP) transistor output module designed for distributed control system (DCS) applications in process automation, power generation, and heavy industry. The 086348‑001​ plugs into a dedicated S800 I/O termination/base unit (TU830 / TU833 / TU841 etc.) which provides the field wiring terminals, 24 VDC field power (UP/V+ and 0 V / U0), and the module mechanical latch. Each of the 32 output channels can switch up to 0.5 A continuous (2 A max total module load) at 24 VDC nominal (20.4–28.8 VDC), making the ABB 086348‑001​ suitable for driving DC relays, contactor coils, solenoid valves, annunciator lamps, and other low‑power actuator loads directly from the DCS I/O rack without intermediate interposing relays in most cases.Communication between the 086348‑001​ and the Advant Controller (AC450 / AC460 / PM8xx) or 800xA Controller (PM86x / PM89x) takes place over the S800 I/O ModuleBus — a high‑speed serial bus embedded in the I/O cluster’s ribbon cable or fiber optic link — with output states updated on every I/O scan cycle (typically 50–250 ms depending on configuration). The module features group‑wise optical isolation (500 V AC test) between the ModuleBus/logic side and all 32 output channels (outputs are divided into two isolated groups of 16 channels each, each requiring its own 24 VDC field supply feed), short‑circuit and overload protection per channel with automatic recovery, and a front‑panel multifunction LED that indicates module health (RUN / INIT / ERROR) and output group activity. The fail‑safe (de‑energize on communication loss / watchdog timeout) behavior of each channel is software‑configurable in Control Builder or the Advant Engineering Workplace — outputs can be forced off, held last state, or set to a predefined value on loss of communication, supporting SIL‑rated process safety requirements when part of a properly engineered SIS architecture.Because the ABB 086348‑001​ is a direct form‑fit‑function match for the SD834 and is recognized by both Advant and 800xA configuration software under the same GID (Generic I/O Device) parameters, it remains the specified spare for legacy Advant OCS racks and a fully compatible module for new S800 I/O expansions in brownfield modernization projects. Its 32‑point high‑density design in a single‑width S800 slice (approx. 45 mm wide) conserves cabinet space versus older 16‑point DO modules and reduces per‑point wiring cost.

Technical Specifications