Honeywell 10005/1/1 Watch Dog Module

Description

The Honeywell 10005/1/1 Watchdog Module (WD) monitors critical system parameters to ensure proper functioning of the process and prevent failures:

Application Loop Monitoring:
- Maximum execution time: Detects if the process is correctly executing its program and not in a loop (hang-up).
- Minimum execution time: Detects if the processor is skipping parts of the program.
5 Vdc Voltage Monitoring:
- Monitors for overvoltage and undervoltage (5 Vdc ± 5%).
Memory Error Logic:
- Monitors the CPU, COM, and MEM modules. In case of a memory error, the watchdog output is de-energized.
ESD Input:
- Independent input to de-energize the watchdog output from the processor. This input is 24 Vdc and is galvanically isolated from the internal 5 Vdc.

The module functions as a 2-out-of-3 voting system, where each section monitors the parameters described.

Maximum WDG OUT Output Current: 900 mA (fuse 1A) 5 Vdc. If multiple output modules are on the same 5 Vdc supply and require a higher current, a watchdog repeater (WDR, 10302/1/1) is required to divide the load between the WD and the WDR.

Technical Data

General

Type Number: 10005/1/1 01302 / 10005/1/1 01303
Approvals: CE, TÜV, UL
Software Versions: All
Space Requirements: 4 TE, 3 HE (= 4 HP, 3U)

Power

Power Requirements:
- 5 Vdc, 175 mA (without WDG OUT output current)
Ripple Content: < 50 mV p-p

WDG OUT

Max. Output Current: 900 mA

Input

ESD1 Input: 24 Vdc, 5 mA
Reset Input: 24 Vdc, 10 mA
ESD2 Input: 5 Vdc, 10 mA

Notes

Modules with a suffix code are functionally identical to those without a suffix. The changes involve improved production yield and reliability.
Suffix Code Details:
- 01301: Supports the 10005/O/1 watchdog horizontal bus.
- 01302: Supports the 10005/O/2 watchdog horizontal bus with ESD key switch.
- 01303: Supports the 10005/O/3 watchdog horizontal bus without ESD key switch.
Important: Do not remove or replace this module while power is on to its Central Part.

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