The maximum allowable external capacitance (Co) and inductance (Lo) of MTL7796 vary with the intrinsically safe terminals and adapted gas groups. The core parameters are as follows:

1. 3-Ground terminal: IIC (0.1μF/4.91mH), IIB (0.77μF/20mH), IIA (2.6μF/40mH)
2. 4-Ground terminals: IIC (0.22μF/13mH), IIB (1.41μF/51mH), IIA (5.5μF/108mH)

Note: When the inductance and capacitance (excluding cables) in the intrinsically safe circuit are both greater than 1% of the allowable value, the parameters are implemented as 50% (specifically, refer to the attachment of the product explosion-proof certificate).

The different terminals on the intrinsically safe side of MTL7796 refer to the core terminals on the device that connect to field devices in hazardous areas. The core information is as follows:

1. Terminal 3 – Ground terminal: The terminal group composed of terminal number “3” and the ground terminal is connected to one field equipment signal line.
2. 4 – Ground terminal: Terminal number “4” and the ground terminal form another set of terminals, connected to another independent field equipment line.
3. Supplementary: The intrinsically safe terminal is usually marked in cyan and features a detachable design. The two sets of terminals work separately to form an independent intrinsically safe circuit.

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