Suspension is not punishment. Practically, when the presence of the delinquent employee is not desirable, during investigation/enquiry, then the employer suspends the delinquent employee and it is not as a 'punishment'. It is another aspect, whether the employer conducts a formal domestic enquiry or not. However, without proceeding further i.e. conducting a domestic enquiry, suspension is not advisable.
In any event, should not be for more than 90 days, otherwise, full salary would be payable. During the initial period of 90 days, subsistence allowance as per standing orders applicable upon the industry, will have to be paid.