R621 *Protect circuits with appropriate circuit breakers. Each branch circuit must be protected by 1 and only 1 circuit breaker or fuse on the PD per Table 8‑3. No other electrical load can be connected to the breaker or fuse supplying this circuit with the exception of devices downstream of a permitted motor power adapter board placed between the PD and a motor controller (WCP-1380, RF-4003, RF-4004, RF-4005).
Table 8‑3 Branch circuit protection requirements
|
Branch Circuit |
Circuit Breaker/ Fuse Value |
Quantity Allowed Per Breaker |
|
Motor Controller |
Up to 40A |
1 |
|
CUSTOM CIRCUIT |
Up to 40A |
No limit |
|
Automation Direct Relay 40A (*6M40*) |
Up to 40A |
1 |
|
Fans permitted per R501 and not already part of COTS computing devices. |
Up to 20A |
No limit |
|
Spike Relay Module |
Up to 20A |
1 |
|
Automation Direct Relay 25A (*6M25*) |
Up to 20A |
1 |
|
PCM/PH – with compressor |
Up to 20A |
1 |
|
Servo Power Module/Servo Hub |
Up to 20A |
1 |
|
Additional VRM (non-radio)/Additional PCM/PH (non-compressor) |
Up to 20A |
3 total |
|
Automation Direct Relay 12A (*6M12*) |
Up to 10A |
1 |
This rule does not prohibit the use of smaller value breakers in the PD or any fuses or breakers within CUSTOM CIRCUITS for additional protection.
Fans permitted per R501 may also be included within CUSTOM CIRCUITS.