Siemens Industry, Inc.
Building Technologies Division
P/N 315-034850-8
2
INSTALLATION
Remove all system power before installation, first battery then AC. (To power up,
connect the AC first, then the battery.)
Electrical Connections
After you have set the HZM address, connect the field wiring. There are three basic
connections to the HZM: initiating devices, DLC or FS-DLC device loop, and 24 VDC
power. All terminals are power limited.
Initiating Devices
(Figures 2, 3, and 4)
The HZM supports one zone of initiating devices in either Class A or Class B. The
initiating devices are connected to terminals 5–8 on the HZM terminal block. The
HZM is a polarity insensitive module and terminals 1 and 2 can be connected to
either line of the DLC or FS-DLC Device Loop. Figure 2 shows the Class A wiring.
Figure 3 shows the Class B wiring.
1
2
3
4
5
6
7
8
9
EARTH
DEVICE LOOP
24VDC POWER
LINE 2
LINE 1
STYLE D/CLASS A
(DCLA)
EOL *
†
* EOL DEVICE IS 4.7K, 1/4W (P/N 140-820188)
FOR CANADIAN APPLICATIONS, USE MODEL
†
EL-33 WITH 4.7K, 1/4W RESISTOR.
+
+
+
Figure 2
HZM Initiating Devices Wiring Diagram
Class A/Style D (ULC DCLA) Installation
Figure 3
HZM Initiating Devices Wiring Diagram
Class B/Style B (ULC DCLB) Installation
DEVICE LOOP
24VDC POWER
LINE 2
LINE 1
1
2
3
4
5
6
7
8
9
EARTH
NOT USED
STYLE B/CLASS B
(DCLB)
* EOL DEVICE IS 4.7K,
1/4W (P/N 140-820188)
FOR CANADIAN APPLICATIONS,
†
USE MODEL EL-33 WITH
4.7K, 1/4W RESISTOR.
+
+
EOL*
†
NOTES
1. Wire 18 AWG minimum, 12
AWG maximum, 35 ohms Max.
2. Supervised, power limited to
NFPA 70 per NEC 760.
3. Voltage 24VDC.
4. Positive and negative ground
fault detected at <60K ohms
for terminals 5-8.
NOTES
1. Wire 18 AWG minimum, 12
AWG maximum, 35 ohms Max.
(both sides)
2. Supervised, power limited to
NFPA 70 per NEC 760.
3. Voltage 24VDC.
4. Positive and negative ground
fault detected at <60K ohms
for terminals 5, 8.