Instruction manual

ROC800-Series Instruction Manual

3-4 Power Connections Revised Jul-14

+ / –

AUX+ / AUX–

LED

3.3

LED

Figure 3-2. 24 Volt dc Power Input Module

Table 3-3. 24 Volt dc Power Input Terminal Block Connections

Terminal Blocks Definition Volts DC

+ and –

Accepts 24 Volts dc nominal from an AC/DC converter

or other 24 Volts dc supply.

20 to 30 Volts dc

AUX+ and AUX–

Supplies reverse polarity protected source voltage to

external devices. Circuit limited.

+12 Volts dc minus

∼

0.7 Volts

Table 3-4. 24 Volt dc Power Input LED Indicators

Signal LED

Green LED on when voltage is provided to backplane.

3.3

Green LED on when voltage is provided to CPU.

3.1.3 30-Volt DC Power Input Module (PM-30)

Using the PM-30, the ROC800 can accept up to 30 Volts dc (nominal)

input power from an AC/DC converter or other 30 Volts dc supply

connected to the + and – terminals. Connect the input power to either or

both of the + and – channels. The PM-30 module does not have CHG

terminals for monitoring a charging voltage, and does not monitor the

input voltage for alarming, sleep mode, or other monitoring purposes.

The module has two LEDs that indicate voltage is received at the

backplane and the CPU (see Figure 3-3 and Tables 3-3 and 3-4).

The module uses 3.3 Volts dc switching power to provide power to the

I/O and communications modules installed in the ROC800 and any