Specifications
WSE • 3/21/97 16720 — 6 Alto 818 Access Control System
b. Capacities:
1) Monitor point inputs: 4 (four) 2-state.
2) MSM units: up to 8
3) Monitor inputs: 32
c. Specifications:
1) MSM board dimensions: 4 in. Square by 1 in. (10 cm square X 2.54 cm).
2) [MSM enclosure dimensions: 4.5 in. square X 2.25 in. (12 cm X 15.7 cm).]
d. Environmental:
1) Humidity: 10% to 95% non-condensing.
2) Temperature: 20° to +120° F (-7° to +49° C).
e. Mounting: The MSM shall be mounted in a NEMA type enclosure with the Controller or
standalone in a controlled area.
f. Power:
1) Source: Coax wiring connected to the Controller.
g. Wiring:
1) A single coax cable with recommended maximum length of 1,000 feet shall connect the
MSM to the Controller and must meet the following specifications:
(i) Pure copper, single strand, 18 AWG center conductor, a foam dielectric and a dual
shield, 61% AL braid, 100% AL bond wrap, impedance of 75 ohms and the physical
dimensions of RG6/U. All spools must have a 100% sweep test before use.
(ii) Additional cables, for direct burial, plenum and elevator rated conforming to WSE
models SE9284DB, SE9284PL and SE9284EL can be utilized for the respective
applications.
2) Input wiring: Twisted pair wiring with distances up to 200 feet between MSM and contact
point.
3) Module shall require a supervisory End of Line resistor at each contact.
h. Communication: The MSM transmits information via the coaxial cable to the Controller.
i. Manufacturer: Westinghouse Security Electronics Model #774-A.
3. Annunciator Control Module (778A):
a. General:
1) 778A Remote Annunciator Module (Annunciator) provides 8 (eight) dry contact outputs
plus status and latched alarm outputs.
2) Module shall also have building mode indicator and mode selector switch and input
points for remote selector switches.
3) Outputs are programmed to operate based on alarm/report generated from the Controller.
b. Capacities:
1) Output alarm contacts: 8 (eight).
2) Master latched alarm contact: 8 (eight).
(i) Rating: 0.5A.
c. Specifications:
1) Dimensions: 12 in. X 5.25 in. X 3.375 in. (31 cm X 13.4 cm X 9.5 cm).
d. Environmental:
1) Humidity: 10% to 90% non-condensing.
2) Temperature: 20° to +120° F (-7° to +50° C).