Trigger distributor box TRG-8S is mainly designed for vehicle crash test. It can also be used for multi-devices synchronous trigger during tests. The trigger input is usually connected to a ribbon switch or a photoelectric switch. Trigger output is connected to data acquisition, airbag squib device, cameras, etc. All 8 internal channels are optically isolated. And trigger input is active if any one trigger input got signal. Built-in battery is UPS function, it is no matter the external power is connecting or not. The battery on button is locked after run to avoid the influence of shock.