Models 154-8 8 Trunk Powerfail Transfer and 154A-8 Peace of mind protection during power failures . . . powerfail transfer for ground or loop start trunks The Models 154-8 (48VDC) and 154A-8 (24VDC) provide bypass for up to 8 trunks when the power fails. See Ordering Information chart for model numbers. Easily installed using parallel connections, the Model 154 products work with ground start or loop start trunks and have automatic ground start built-in. They can be activated by power failure, a manual bypass switch or a ground from a local or remote location. The Model 154 can also be set up to control auxiliary equipment with two sets of relay contacts. You may install multiple units to handle more than 8 trunks. When the power is returned, the Model 154 will restore only those powerfail trunks that are idle. Others are restored only after they become idle. Calls are never lost a second time! Don’t be fooled by Uninterrupted Power Supplies (UPS). They only protect against power outages. The 154 provides full protection against system equipment failures as well as power outages. Benefits Application Every successful organization thrives on efficient communication links with – Connects dedicated telephones directly to clients and suppliers. If you fall into this category, you cannot miss a call. It Central Office during powerfail or major alarm could be a customer calling with an order or a supplier calling with a delivery date. Communications by telephone lines, whether voice or data, are crucial to a – Automatic ground start business’s success. That’s why power failure can hurt your company. When the – Calls in progress are not interrupted when power goes out, your communications link with the rest of the world is severed power is restored unless you have the Model 154 Powerfail Bypass unit installed in your facility. It’s the obvious solution for every business and organization. When the power – Parallel connections simplify installation goes out, or you have a major alarm, you will continue to receive calls and – Activated by powerfail, manual bypass switch business goes on as usual. You can even control auxiliary equipment using the or remote ground Model 154 such as an autodialer to inform another branch or customer that your power is down. – LED power indicator – Can be remotely activated – 2 sets of auxiliary contacts, one normally open, one normally closed 4130 - 148th Avenue NE, Redmond, Washington, USA, 98052 • Tel: 425-869-1963 • Fax: 425-869-0717 • www.dees.com Installation Ordering Information Model 154-8 8 Trunk Powerfail 48VDC Model 154A-8 8 Trunk Powerfail 24VDC Model 154A-8/PSU 8 Trunk Powerfail 24V PSU - with Power Supply - (Model 193) Specifications Dimensions (HxWxL) Min Typical Max Unit 1.75" x 4.75" x 13.5" (4.5 cm x 12.1 cm x 34.3 cm) Electrical Shipping Weight Operating Supply Voltage 3.57 lbs (1619 grams) - without power supply Model 154-8 40 56 VDC Certification Approval Number Model 154A-8 20 28 VDC DOC CS03 350 1976 A Operating Supply Current CSA C22-2 No. 225-M90 LR 65726 Model 154-8 230 mA (DC) FCC Part 68 FCNCAN-22540-OT-N Model 154A-8 460 mA (DC) 2 UL 1459-2 D05921080C and Loop Current 20 120 mA (DC) D0292442DBC Auxiliary Contacts Current 2 A (DC) Voltage 30 VDC Power 30 VA Environmental Operating Temperature 32 158 °F 070 °C (intended for indoor use only) Humidity (non-condensing) 95 % RH