Johnson Controls S300 Series Hardware Installation Manual page 20

Hardware Installation
The DC Power Harness
Connects to the
DIN-mounted device
 To replace the DC power harness:
1. Switch the power off.
2. Disconnect the DC power harness cables.
3. Replace the harness and reconnect the cables.
4. Switch the power on.
The Lock
To replace the lock, follow the instructions included with the hardware.
The Tamper Switch
 To replace the tamper switch:
1. Disconnect the tamper switch wires from the input point of the DIN-mounted
device.
2. Remove the nut securing the switch to the bracket.
3. Replace the switch and secure it with the nut.
4. Wire the tamper switch to an input point of the DIN-mounted device.
The Spare Connectors
Two spare connectors are provided:
4-position terminal block, 12-24 AWG, to be used to connect the RS485 to the

DIN-mounted device.
3-position terminal block, 12-24 AWG, to be used to connect the power

supply to the DIN-mounted device.
16
Connects to
chassis ground
Figure 4-1: DC Power Harness
This document contains confidential and proprietary information of Johnson Controls
S300-DIN-L
Connects to COM
of the power supply
Connects to +24
of the power supply
24-10239-340 Rev. B
© 2017 Johnson Controls