Specifications:
Supply Voltage:    15 to 24 VAC / VDC: -5% to +10%
Operating Frequency:    4 Mhz (Microprocessor)
Power Consumption:    10 mA at rest, 50 mA Max.
Output:    (2) SPDT Relays
Maximum Voltage – Relay Contact:    30 V DC, 120 VAC
Maximum Current – Relay Contacts:    1 A DC, 0.5 A AC

MC-25: Micro-processed module that provides relay outputs for the purpose of coordinating automatic door operation with electronic lock triggering.
A. The module shall be digitally processed and shall have two  relays: one relay designated as “delay on break”, the other  designated as “delay on make”.
B. Timed outputs shall be fully adjustable and the “delay on break”  relay shall be field selectable for a “wet” output” which is  equivalent to the input voltage. Non micro-processed modules  shall not be acceptable.
C. Module Dimensions: 3”W x 2”H x .9”D

MC-25 (10MC25) is a Delay on Make / Delay on Break Time Delay Module.
The delay on break timer will release the lock and then the delay on 
make timer will enable the door to open and be held open for a set 
period of time.
When a momentary contact closure is applied at the input wires, RELAY 1 ( 0-7 seconds) will become active. Approximately 0.5 or 1.5 seconds after RELAY 1 becomes active, a second relay, RELAY 2, ( 0-15 seconds ) will become active. The time delay will begin as soon as the input signal is released. If another momentary contact closure is applied to the input wires during the output of RELAY 2, the entire timing cycle will begin again. RELAY 2 will not drop out, but it will be reset to the full time delay. Also, the input voltage can be supplied through the contacts of RELAY 1 by changing the position of two jumpers on the MC-25.