Power & Expansion Module Accessory for the TG-7 Series You love our TG-7 commercial series of alarm communicators for their unmatched reliability. Now you'll love them for their superior flexibility as well. With the TG-PEM Power & Expansion Module, you now have access to the TG-7 features you've requested most. When the fire panel doesn't have a DACT, use the TG-PEM as a solution to connect panel relay outputs to the Telguard Fire Communicator to deliver the essential signals: fire alarm, trouble, and supervisory. The TG-PEM's zone expander allows you to expand Telguard intrusion communicators with 8 highly configurable zones (16 if you use two TG-PEMs).