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WIRING
DLC LINE 1
1
DLC
LINE
2
2
DLC
LINE
1
DLC
LINE
2
3
PIGTAIL LEADS
Figure 3
HMS-2S / HMS-SA Wiring Information
INSTALLATION
Surface Mounting
Flush Mounting
ELECTRICAL RATINGS
Siemens Industry, Inc.
Building Technologies Division
Florham Park, NJ
TO NEXT ADDRESSABLE DEVICE
FROM INITIATING CONTROL PANEL
OR PREVIOUS ADDRESSABLE DEVICE
EARTH GROUND
PROGRAMMABLE
N/C AUX CONTACT
24 VDC, 2A
(DOOR HOLDER OR
A MAGNETIC LOCK
RELEASE, ETC.)
ONLY CONNECT TO
POWER LIMITED SOURCE
Distribute the manual station boxes throughout the protected area so that they
are unobstructed, readily accessible, and located in the normal exit path. Place the
manual station according to the regulations of the authorities having jurisdiction.
Mount the backplate to a Model MC-5 Backbox as shown in Figure 4.
Mount the backplate to a user supplied single gang switchbox as shown in Figure 4.
Do not overtighten the screws. Overtightening may distort the backplate.
2¾ in.
BACKPLATE
KEYSWITCH
SURFACE
LOCKING
SCREW
MOUNTING
ENCLOSURE
HOUSING
Figure 4
Mounting The HMS
D
L
C
M
a
. x
C
r u
e r
t n
Siemens Building Technologies, Ltd.
Fire Safety & Security Products
2 Kenview Boulevard
Brampton, Ontario L6T 5E4 Canada
NOTES:
1. Recommended wire sizes:
18 AWG minimum, 14 AWG maximum
2. Wire larger than 14 AWG can damage the connector.
3. When using shielded cable without metal raceway or with
nonmetallic raceway, the shields should be terminated at the device
ground terminal. If the device box is already grounded by another
means, such as being mounted to a grounded structure, the wire
shields should be continuous and must be grounded solely at the point
of origin; for example, at the control panel.
4. When using shielded cable with metal raceway, the wiring shields
shall be continuous and grounded solely at the point of origin. The
device ground terminal shall be connected to the grounded device box.
5. When using metal raceway without shielded cable, connect the
device ground terminal to the grounded device box.
6. Metal raceway should be thoroughly grounded throughout the system.
7 . Addressable Device Loop ratings:
Voltage: 31V max.
18V min. (pulsing)
Current maximum: 1mA
In supervisory: HMS-2S / HMS-SA draws 1mA.
8. The HMS-2S / HMS-SA is a polarity insensitive device. Line 1 and Line 2
can be either line of the loop.
The use of limited energy cable is not allowed.
4 in.
MODEL
MC-5
5½ in.
HOUSING HINGED
TO BACKPLATE
NAMEPLATE
BACKPLATE
FLUSH
MOUNTING
ENCLOSURE
/
F
S
D -
L
C
L
o
o
p
1
m
A
3½ INCH DEEP
SWITCH BOX
(USER SUPPLIED)
3½ in.
3 in.
P/N 315-033430-6
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