The 3500/32 and 3500/33 are relay modules of the Bently Nevada 3500 series monitoring and protection system, which are mainly used to realize functions such as alarm, interlock, and control in industrial automation systems. The following is a detailed introduction: – **Relay Type and Channel Quantity** – The 3500/32M is a full – height module with 4 double – pole double – throw (DPDT) relay channels. – The 3500/33 is also a full – height module, equipped with 16 single – pole double – throw (SPDT) relay channels. It can also be configured to work like a DPDT relay, using two SPDT relays to perform the function of each configured DPDT relay. – **Output Logic and Configuration** – Each relay output of the two modules can be programmed independently to perform voting logic. – Each relay contains alarm drive logic, which can use “AND” and “OR” logic. The alarm drive logic can be programmed through the 3500 rack configuration software. It can use alarm inputs (such as alarm and danger statuses), abnormal signals, and individual measured variables of monitor channels or their combinations as trigger conditions. – **Application Scenarios** – They can be used for alarm, interlock, and control. When a fault or abnormal condition is detected, the alarm signal can be triggered, preventing dangerous operations or accidents, and controlling the start, stop, and operating status of equipment. – Widely used in industrial fields such as petroleum and natural gas production, water treatment, process control, and safety protection. – **Installation Method** – Any number of 3500/32M or 3500/33 modules can be installed in any slot on the right side of the transient data interface module in the 3500 system, which is convenient for programming the “alarm drive logic” that controls the relay action.
