DOZ7138 (Z7138) is an 8-channel digital output terminal board / base of the German HIMA H41q/H51q system, specifically designed for 8-point DO modules (such as F3330/F3331), used for the switch quantity output connection in the SIL3 safety system.

Basic Information

Model: DOZ7138 (referred to as Z7138)

Brand: HIMA (Black Horse)

Type: 8-channel DO isolation terminal base

Compatible system: H41q/H51q (QMR redundancy)

Compatible module: F3330, F3331 (8-point digital output)

Safety level: SIL3 / AK6 (TÜV certification)

Specification parameters

Channels: 8 digital outputs (DO)

Signal: 24VDC active / relay contacts

Single-channel capacity: 24VDC/2A (resistive)

Isolation: Electrical isolation between channels

Connection: Screw terminals (field) + backplane sockets (for modules)

Operating voltage: 24VDC (±20%)

Temperature: 0°C ~ +60°C

Protection: IP20 (in cabinet)

Installation: Standard DIN rail

Functions and Applications

8-channel high-current DO adapter: Compatible with F3330/F3331, used to drive large current actuators such as solenoid valves, contactors, and audible and visual alarms.

Redundancy compatibility: Supports H41q/H51q quad redundant (QMR) architecture.

Diagnosis and protection: Channel-level isolation, short circuit / overload protection, combined with modules to achieve open circuit / short circuit detection.

Application scenarios: Key valve / actuator control in petrochemical ESD, power plant BMS, and oil and gas F&G systems.