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Page 9

Installation and Wiring - (continued)

Power Wiring - The CTM-530 requires external regulated, uninterruptible DC power. The module pro-

vides an internal switch regulator which supports input voltages between 12 to 24 VDC (+10% - 15%) @

1.6 Watts. To implement remote resetting of the module from the host panel, the supplied power bay be

interrupted during the host panels reset sequence. This “resettable power” function is the only means of

resetting the CTM-530LT version of the module which is provided without an integrated user interface.

Step 4 - Connect a regulated 12-24VDC resettable power supply to terminal J10 as shown in the

ﬁ eld wiring diagram (Figure 6). See the “Speciﬁ cation” section for power requirements.

Important! - The CTM-530 must be connected to earth ground via the J10 GND terminal as depicted in the

ﬁ eld wiring diagram. If earth ground is unavailable, for example in vehicle applications, the GND and COM

terminals must be connected to each other with a jumper wire.

4-20mA Output Wiring - The CTM-530 provides two 4-20mA outputs which allow the status of the mod-

ule to be remotely monitored. See the speciﬁ cations section of this manual and the 4-20mA Output Infor-

mation section for additional information on each outputs function.

Step 1 - Connect a regulated 12-24VDC power supply to Loop - 1 terminal J9 +V and to terminal

J9 RTN as shown in th eﬁ eld wiring diagram (Figure 6). Repeat this step for Loop - 2.

Step 2 - Select a conditioning resistor value from the list below based on the supply voltage and the

loop resistance of the measurement wiring. The total lop resistance including the resistor value

should not exceed the resistance value shown for the supply voltage.

Supply @ 12VDC - 300 Ohms

Supply @ 24VDC - 800 Ohms

Step 3 - Connect the measurement device wiring and load resistor determined in step 2 to terminals

J9 OUT and J9 RTN as shown on ﬁ eld wiring diagram (Figure 6). Repeat this step for Loop 2 if

the second loop is to be monitored.

Protectowire CTM-530 Series User Manual

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