Installation Instructions

D371B/D371C | Installation Instructions | 2.0 Installation
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Bosch | 2/06 | 33852C 3
2.0 Installation
2.1 Installing the Floor-Mount Bracket
Verify the bracket mounting can withstand
the stress the door exerts on it through the
D371B/D371C Electromagnet.
The D371B/D371C is packaged with the backbox
mounted on the bracket. The backbox accepts
electrical conduit through knockouts at the top, bottom,
and back (Figure 2).
Figure 2: D371B/D371C Bracket Mounting
1
2
2
1 - Floor-mount bracket
2 - Floor mounting anchor screws (4)
1. Remove the four backbox mounting screws.
2. Position the bracket so the backbox aligns with the
catch plate location on the door. Refer to
Section 2.4 Mounting the Catch Plate to the Door on
page 5 for the catch plate location and alignment.
3. Securely mount the bracket to the floor.
2.2 Attaching the Backbox to the Bracket
Refer to Figure 3 when attaching the backbox to the
bracket.
Figure 3: Backbox to Bracket Mounting
1
2
3
4
1 - Floor mount bracket
2 - Backbox
3 - Backbox screws (4)
4 - Anchor screws (4)
1. Mount the backbox to the bracket and connect the
wiring conduit.
2. Pull the circuit wiring through the conduit and into
the backbox.
The D371B/D371C operates on 24 VDC, 24 VAC, or
120 VAC. The D371B/D371C terminals accept wires
between 12 AWG (2.3 mm) and 22 AWG (0.8 mm).
You can wire 120 VAC to either Terminal L or
Terminal H depending on the required holding force
(Table 1).
Table 1: Specifications
Input
Voltage
Terminal
Connections
Current
Draw
Holding
Force
24 VDC nominal
(18 VDC to
30 VDC)
C&L 20 mA 40 lb
(18 kg)
24 VAC nominal
(18 VAC to
30 VAC)
C&L 19 mA 40 lb
(18 kg)
120 VAC nominal
(90 VAC to
150 VAC)
C&H 20 mA 35 lb
(16 kg)
120 VAC nominal
(90 VAC to
150 VAC)
C&L 100 mA 110 lb
(50 kg)
Terminal C = Common
Terminal L = Low voltage
Terminal H = High voltage