RDM172 Remote Display Module QUICK GUIDE BG0324 Rev.
RDM172 Remote Display Module QUICK GUIDE The RDM172 is an optional remote display for the PM172 Powermeter. It features a bright LED display (3 windows with 6 LEDs each), 18 LED indicators, two communication receive/transmit LEDs, 6 control pushbuttons, and a communication port (RS-485). The RDM172 uses the Modbus RTU transmission protocol for communication with the PM172 and acts as the Master.
LIMITED WARRANTY The manufacturer offers the customer a 24-month functional warranty on the instrument for faulty workmanship or parts from date of dispatch from the distributor. In all cases, this warranty is valid for 36 months from the date of production. This warranty is on a return to factory basis. The manufacturer does not accept liability for any damage caused by instrument malfunction.
1 Mechanical Installation 1.1 Standard Cutouts (round or square) Figure 1-1 RDM172 Cutout Dimensions Figure 1-2 RDM172 Mounting STEP 1: Insert RDM into cut-out. STEP 2: Fasten washers and nut on screws.
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2 Electrical Installation The RDM172 is connected to the PM172 via terminals as shown in Figure 2-1. One RDM unit can be connected in multi-drop mode to up to 32 PM172 instruments. Figure 2-1 RDM172 Electrical Connections IMPORTANT: It is recommended to solder the wire ends before attaching them to the connectors.
3 Setup on the RDM 3.1 Instrument Setup Menus Following is a list of instrument setups menus available from the RDM.
Table 3-1 RDM Options (∗ default setting) Display Code Parameter Options Description diSP UPdt 0.5 UPdt Display update time 0.1 - 10.0 s (0.
Display diSP bAud 19.2 Code Parameter bAud Baud rate Options Description 2400, 4800, 9600, 19200* dAtA diSP dAtA 8n Data format 8n*(8 bits, no parity) 4 Status Information Menu Table 4-1 lists the displays available from the RDM Status Information Menu. The display windows are labeled in the table as follows: 1=upper window, 2=middle window, 3=lower window. Table 4-1 Page Window 1 1 8 Parameter Digits 1 2 rOt. 1 3 Phase rotation (POS/NEG/ERR) 2 1 rEL. 2 2 1.2.
5 Troubleshooting: Fault Condition Display The RDM172 fault condition screen provides an indication of communication problems, should any occur. Reasons for a communication fault could be: • Instrument switched off • Communication cable disconnected • Instrument communication setup changed diSP Con.E • RDM172 communication setup changed Press to check or alter the RDM172 adjustment and scroll to communication options.
