User`s manual

WATLOW Series 945 High/Low Limit User's Manual

Series 945 Model Number Information

The Series 945 Model Number, listed on your unit sticker, is defined below.

Control

Series 945 = 1/4 DIN, single input,

High/Low limit, dual alarms,

dual digital displays.

Input Type

1 = Type J, K, T, N, C, PT2 thermocouple

2 = Type J, K, T, N, C, PT 2 thermocouple,

RTD 1°, 4-20mA, 0-5VDC

3 = Type J, K, T, N, C, PT 2 thermocouple,

RTD 0.1°, 4-20mA, 0-5VDC

Alarm 1

Output 1 Type

C = Switched DC, (Open Collector), non-isolated

Alarm 2

Output 2 & 3 Type

2 = Dual, Mechanical Relay, 6A, Form A or B

Communications

A = None

B = Isolated RS-423/RS-422

D = EIA-485

Specifications

Communications

• Serial data communications.

• RS-422A or RS-423A (RS-232C compatible) or EIA-485.

• ANSI X3.28 protocol, or XON/XOFF protocol.

• Isolated.

• Data logging.

• #6 compression type screw terminals.

Power

• 120/240VAC + 10%, -15%, 50/60Hz, ± 5%.

• 16VA maximum.

• Data retention upon power failure via non volatile memory.

Operating Environment

• 32 to 149°F/0 to 65°C.

• 0 to 90% RH, non-condensing.

Dimensions

• Height: 3.8 in. 97 mm

• Width: 3.8 in. 97 mm

• Overall depth: 7.0 in. 178 mm

• Behind panel depth: 6.0 in. 153 mm

• Weight: 2.5 lb. max. 0.4 kg

A P