EPS IPES-IR3 - Terminal Block Arrangement; Modbus Address and Baud Rate Configuration

820-0003
IPES IR3 Flame Detector
Operating Manual
Page 18 of 37
IPES‐IR3 Terminal Block
Table 6‐1: Arrangement of Electrical Connections
Terminal Block
Pin
Function
X3
+24V
24VDC from system power source (External User Provided)
GND
System Ground from system power source (External User Provided)
+4/20
Industry Standard +4-20mA current loop output
RS485A
RS-485 MODBUS
RS485B
RS-485 MODBUS
R_WORK
R_WORK
Fault / Obstruction Relay Normally Closed (NC Type B) When Energized
X4
+24V
Output to next device if required
GND
Output to next device if required
-4/20
Industry Standard +4-20mA current loop output
RS485A
Output to next device if required
RS485B
Output to next device if required
R_FIRE
R_FIRE
Alarm Relay Normally Open (NO Type A) When Energized
X5
Factory Use
X6
Factory Use
Arrangement of
Electrical Connections
Arrange the electrical connections as described in Table 6‐1, Table 6‐2 and Figure 6‐3 below.
To connect the IPES‐IR3 to external devices, use armored control cables 4 x 1.5, which are used in
all classes of explosive zones including indoor and outdoor sites, channels, tunnels, ground
(trenches) with corrosive medium, and in zones containing roaming currents.
Setting the Modbus
Address and Baud Rate
To ensure proper communications, a unique address must be assigned to each device, as duplicate
addresses are not automatically detected. Modules with duplicate addresses will report with the
same address, confusing latest updates. Record all addresses and device types after completing the
installation.
Refer to Appendix B for setting the Modbus address and baud rate.
When using an RS‐485 bus connection, it is advisable to connect the IPES‐IR3 to the bus via the
terminal box. To connect the detector to the terminal box, use a cable not longer than
1.64 feet (0.5 m). The cable characteristics should meet the requirement of the cable entries
mounted on the IPES‐IR3 casing and those of the terminal box.