Figure 3-5
- Sample Relay Output Wiring
NOTE: The relay can be
programmed to be failsafe
(normally energized). By default,
the relay is set to be normally
de-energized. This can be set using
parameter P-06.
MODBUS Network Configuration
Wiring and Configuration • 11
Make relay connections (NO, NC, or both) using 18 to
20 AWG wires to terminal block positions 10, 11, and
12 (see
Figure 3-5
), noting normally open, normally
closed, and common connectors per
Table 3-3
.
Table 3-3
- Relay Output Terminal Block Connections
Function
Pin
Mounting
Procedure
Relay (Alarm)
Output
10
Relay NC contact
11
Relay common
contact
12
Relay NO contact
3.5.
MODBUS Network
Configuration
If your application includes a MODBUS network,
make network connections (RS-485 A and RS-485 B)
using 18 to 24 AWG shielded twisted pair wires (with
120 ohm characteristic impedance) to terminal block
positions 7 and 8
Figure 3-6
noting inverted B (-) and
non-inverted A (+) signal connectors per
Table 3-4
.
Figure 3-6
- MODBUS Network Wiring
Table 3-4
- MODBUS Network Communications
Connections
Function
Pin
Wiring
Termination
MODBUS
Network
Communications
7
RS-485 “B” (inverted)
8
RS-485 “A”
(non-inverted)
9
RS-485 shield
CAUTION: For MODBUS network
communications wiring, use only
18-24 AWG shielded twisted pair wire
with 120 ohm characteristic
impedance.
