为了能够在没有电池的情况下运行，需要具备安装于系统当中的-一个PROM设备或者是一-个EPROM，EEPROM和闪存，这些设备可以在没有电池的情况下存储程序逻辑，硬件配置和寄存器中的数值，并且可以在PLC上电的任意时刻配置CPU从PROM中读取数据到RAM存储器中.可能的不利条件

RED LION CONTROLS ALPID400 115 VAC 50/60 HERTZ DC CURRE

JAYCO INC. 3/4″ TD 135 SET 266 SCFM VALVE,

VIKING VK152, DRY HORIZONTAL SIDEWALL SPRINKLER, 175 PS

PARKER F602-06WJ/M4 3/4 250 PSI PNEUMATIC FILTER,

UNIVERSAL FLOW MINIOTR SM-NSB5GM-6-32V?1.0-A3WL-1.5D FLO

ABSOPULSE HBC65-Q6292 115 VAC 47-63 HERTZ SWITCHING POW

GRACO 206728, FIRE-BALL AND MONARK AIR MOTORS REPAIR KI

SOLA 83-24-212-3 SINGLE OUTPUT LINEAR OPEN FRAME DC POW

NUMATICS, 082SS415K, PNEUMATIC VALVE, 15 A, 150 PSIG, 1

WOODHEAD 1R4006A39M030, MINI-CHANGE RECEPTACLE, 4-PIN M

HIRSCHMANN 24VDC 4-PORT RAIL HUB RH1-TP

GE 87198 / GES40048TAC4-5 HIGH PRESSURE SODIUM BALLAST

TECUMSEH RK136AT-002 HERMETIC COMPRESSOR, 100/115 V, 50

WARREN-RUPP 031-039-000, SLEEVE / SPOOL SET, NNB

WARREN RUPP 031-039-000, SLEEVE / SPOOL SET, NIB

REXROTH MOD 13 / 1X0041-001 PROGRAMMING MODULE, NIB

SEW EURODRIVE 5 METER CONTROL CABLE 817 533 0