Description

MTL 8623‑FT‑IS 16‑Channel Intrinsically‑Safe Field Terminal Base

Technical Specifications

• Product Model: 8623‑FT‑IS
• Brand: MTL
• Warranty: One Year
• Input Voltage: Passive terminal assembly; no internal power consumption; terminal rating max 250 VAC
• Operating Temperature: ‑40 °C to +70 °C
• Storage Temperature: ‑45 °C to +85 °C
• Response Time: Not applicable (passive wiring termination hardware)
• Protection Class: IP20, DIN‑rail carrier‑mount; ATEX / IECEx [EEx ia] IIC; cabinet‑side Zone 2 approved; field‑side for Zone 0/Zone 1 hazardous‑area instruments
• Accuracy Class: Passive signal routing, no signal conversion
• Output Frequency: Not applicable
• Rated Current Range: 3 A per‑channel continuous; screw‑clamp terminals accept 0.5‑2.5 mm² multi‑strand instrument cables
• Communication Interface: PAC8000 module mating connector; screw‑clamp field terminals; integrated tag marking strip; mechanical key‑coding for 16‑channel IS modulesEmerson
• Supported Protocols: Passive interface for 16‑channel IS digital‑input module 8220‑DI‑IS; incompatible with 8‑channel IS modulesEmerson
• Overload Capacity: Mechanical anti‑mismatch key‑coding; maintains intrinsic‑safety entity‑parameter compliance; no built‑in electronic protection
• Dimensions: Standard PAC8000 wide‑body I/O terminal footprint, blue IS‑coloured housing

Product Overview

The 8623‑FT‑IS is a blue snap‑on intrinsically‑safe field terminal base for PAC8000 remote‑I/O systems, dedicated for the 16‑channel intrinsically‑safe digital‑input module 8220‑DI‑ISEmerson. It provides screw‑clamp termination for field IS contact‑type discrete sensors located in Zone 0 / Zone 1 hazardous‑locations, and mates mechanically and electrically onto PAC8000 DIN‑rail carrier. It transfers energy‑limited input signals from field switches back to the I/O module, and preserves intrinsic‑safety certification for the whole signal loop.

This terminal base addresses hazardous‑site automation challenges: consolidated 16‑point intrinsically‑safe discrete‑input field termination, mechanical interlock to prevent mismatched non‑IS module installation, and drop‑in spare‑part compatibility for PAC8000 remote nodes. It supports hot‑swap I/O module replacement online while field wiring remains connected to the terminal base. Oil‑gas pipeline‑automation engineers, well‑site technicians and hazardous‑area retrofit integrators benefit most. It fits standard PAC8000 DIN‑rail carriers; terminal hardware can be replaced independently without changing I/O electronics, reducing maintenance downtime for natural‑gas compressor‑stations, refineries and petrochemical remote‑site installations.

Key Application Notes

• Passive terminal base; must pair with 8220‑DI‑IS 16‑channel IS digital‑input module; cannot operate standaloneEmerson
• Blue IS‑rated terminal base; must never be used with non‑IS modules or non‑IS terminal bases mixed‑up
• Mechanical key‑code prevents wrong‑module insertion; only compatible with 16‑channel IS DI module, not for 8‑channel IS modules such as 8215‑DO‑IS (use 8621‑FT‑IS instead)
• Field‑side wiring certified for Zone 0/Zone 1 intrinsically‑safe field switches; terminal base itself must be installed inside safe‑area cabinet or Zone 2 cabinet only